**Additional information!** Something I forgot to mention in the video - obviously, torque is down from the previous generation Z06. Power is ultimately the important figure, because you can make up for torque with aggressive gearing. You can get away with short (high torque) gearing because the engine revs high. New final drive ratio is 5.56:1, previous Z06 was only 2.41:1 (we don't know transmission gears yet). GM engineers say the engine really comes alive above 3,500 RPM. Below 3,000 RPM, not much torque, but part of the reason of keeping the engine large (5.5L is still very big) is so that down low it still has useful grunt. *Edit 1:* It's "Helmholtz" resonance not "Hemholtz." Words are hard for me. *Edit 2:* Should have mentioned, but two of the three center valves (intake manifold) share a common shaft (so they open/close together). So that gives you four possible combinations (all closed, all open, one open, two open). *Edit 3:* At 3:31 I state the naturally aspirated engine will have better air density (for its given pressure). To be clear, the supercharged engine will certainly have a greater air density than the NA engine overall, however it's not as simple as looking at a ratio of the two engines manifold pressure, because the supercharged air will have a higher temperature, reducing oxygen density. Also worth pointing out, it takes power to run superchargers, so some of the additional air going into the supercharged engine is also being used to power the supercharger.
I worked as an engineer at GM for 7 years. The engineers were some of the most brilliant people I've ever met. Unfortunately, also the worst management I've seen.
yea management sucks at big companies. I work for a big engine company and the bean counters come in and ruin a perfect design over a few cents per part..... yea you saved money now. youll pay it out in warranty cost though.
You are a SUPERB teacher. I am not a gear head, just a guy who loves cars. The other reviews I have seen of the new Z06 engine left me without much gain. Your explanations and graphics were so expertly done even I could understand. The best instructors figure out ways to structure the information to maximize comprehension. You, my friend are the best of the best.
@@boscovich11 they don’t steal from frerraii. Funny how farrai has nagnetic damping suspension on their cars and many other Europian cars that was designed by GM
@@boscovich11 they don’t steal from frerraii. Funny how farrai has nagnetic damping suspension on their cars and many other Europian cars that was designed by GM
@@stevehirsch4988 magnetic damping was used by citroen early 70's. They bought a ferrari wrecked and did reverse engineering of the air intake manifold,there is the secret. How they do such quantity of hp. The runners and the cavities that share some interesting resonance. Porsche now use this devices. Aston martin Valkirie and many others,i think that were used commonly in f1 then in some supercars,thats the main reason there is no legal claim against car factories. May be they have already more than 10 years or 15.
Too bad Toyota has BEEN had this technology! Dual overhead camshaft?! C’mon Chevy, it’s about damn time you realize it’s not the size of the engine, but the efficiency of it. Too bad this technology “future” technology is already dwarfed by Mazda’s Skyactiv-X engines. Why the hell didn’t Chevy copy Mazda instead of getting tech from a Toyota Prius?!!!! 🤦🏻♂️
@@pettersaethre they probably used to, but if you haven’t heard of the new Skyactiv-X engines then I’m afraid you are wrong. I myself am a Toyota fan, but Mazda has always been the funner cats to drive and now with the new technology they have they might edge out Toyota. Toyota’s relies too much on its reliability and the cars have become boring. Kia is slowly crewing up and might even pass them
Ive known most of this stuff, just a tad more than "generally". This video explains things so well, that it solidified my understanding to a higher degree. Excellent, and thank you!
I feel smarter every time I finish watching one of your videos! Today, I learned what the annoying buffeting air inside a car with a window down at 60mph is called.
@@MichaelSmith-ye2mt power is gained by getting more air into the motor, more air means more fuels, means more bang. sometimes that just shifting the powerband other option is to get there more efficiently, with less parasitic losses this engine will be near perfect volumetric efficiency. there will be very little to work with, without needing special fuels. plus they won't be porting anything really, it uses velocity stacks with thin walls, meaning, they will have to make new ones from scratch. I predict a lot of work, for little gains
BMW has been doing that with the N52 three stage intake manifold since 2010. Too bad they gave up on the N52 in favor of more powerful but less engaging turbo four cylinder engines.
That intake manifold reminds me a little bit of what you talked about in the video about the Porsche 4.0L flat 6. I think it's a great to get some extra power without forced induction. Crazy engineering for some of the last ICE's. I'm glad they didn't go for a V6 like Ford
If I remember correctly they even got musical instrument's engenieers to design the intake on the LFA to make it sound better. It's amazing where the ICE has come
Variable intake manifolds aren't new at all BMW had a three stage intake manifold in the 3 series 20 years ago. Someone else was probably doing it before that too.
Right! I'm so glad that they had the guts to actually put a manual in the Blackwing and have high hopes that they make the C8 Grand Sport in manual ONLY. It would be a perfect drivers car!
@@hpmetabolics7558 They already explained why they won't put a manual in the Vette, and it's because they literally can't make their money back on it. Not nearly enough people choose them. The number of people who buy these cars for the feeling rather than the performance is tiny
You forgot to mention that the super charged engine loses power running the super charger. (It's a net positive, of course, but it explains why you have less power per liter of air than a NA engine)
I was a bit shocked when I saw how much power they use, it can be as high as 20% of the total output. If I recall correctly, I saw a figure of 120 HP for the C7 Z06 supercharger. That's more than I ever use in my daily driver, and more than a 600 cc sport bike peak output. Dang! But as stated, it is a net positive. It makes me think about using hybrid drives for performance. If you could just drive your supercharger from an electric motor for short bursts of peak performance, what a huge gain you could achieve without even routing electric power to the wheels. The power will need to be returned to the battery over time, but removing the S.C. load for a 1/4 mile rip would be magic!
@@hondolane3125 Really it all depends on the application and the type oc supercharger, you can build some pretty efficient setups with a eithet a roots/screw or centrifugal blower.
@@hondolane3125 IIRC Audi and I think Mercedes both use a 48V battery system on some of their modern engines for specifically this purpose. They use an electrically driven supercharger. There is also a company that sells a kit to fit a 48V supercharger to basically any car that Cleetus used in a few videos for fun.
@@Glarth-WC Well, there I go again with the right idea too late. In the early 50's when my dad was working crew for a stock car team, he thought it might be smart to put a wing at the back to use aerodynamic force to create more rear wheel downforce. Good idea. I'll have to comb Cleeter's old posts for that kit.
The science is sound, 4 valves per cylinder, high rpm configuration, high compression ratio, and enough cam duration and lift. If this thing gets a pair of turbos, it's going to be awesome.
@@JohnLee-db9zt One reason is to have the fastest C8 Z06. Another reason is so the owner of the C8 Z06 doesn't get embarrassed by a commoner in a turbo LS Fox body.
@@c0c0asauce If that’s your goal, then go ahead. 670 hp with 8600 rpm redline and gorgeous flat plane crank V8 sound is perfection IMO. Turbos will ruin that auralgasmic sound, linear response, and reliability.
@@JohnLee-db9zt No argument here. I have an 95 Miata so I know HP isn't everything. Response makes driving at any speed entertaining but there will always be people who just want to be faster than the other guy.
@@Heavywall70 It's been done, it was supposed to go in the SVX replacement, but canned, also a 12 cylinder, to race in F1, it nearly was the powerplant for Koenigsegg's, back in the day
What? Look at the ls9 wich was the one of the most powerful v8s ever made with a 560hp n/a with a capability of holding 30psi boost wich means back in 2007 this engine could have 1010hp with just adding a supercharger
They didn't. They outsourced and paid the people who actually know how to build a proper car. They just use all the money they save from building their other vehicles out of Chinese parts. American made my ass.
Last time the Z06 came out, everyone was hyped about the new power and new interior, then I saw all the owners at the dealerships with serious problems. Let's hope history doesn't repeat itself.
As a UA-camr myself I know how hard it is to film and edit. And I know that taking requests for unplanned videos is not going to happen BUT I'm asking anyway. I'd love to see a video comparing the new LT6 Engine VS the Ferrari 458's F136 Engine. 😎🤙
Talking about the DOHC setup as being the future reminded me of the C4 ZR-1 with the Lotus LT-5 that had DOHC in the 90's Sad GM never used it again until now
Yea they never uses that LT5 after the C4ZR1 because when they came out with the LS1 it made better low speed power and drive much better. Had to really take the LT4 up in the range to really feel any difference. LS1 was very cheap to produce compared to LT5 also.
DOHC is a big deal when you are talking about the king of pushrods. What is amazing about GM is not that they had DOHC engines 30 years ago like the LT5, Quad 4, 3.4 DOHC, and Northstar… It’s that they all but completely abandoned them for any engine with more than one head and made pushrod engines that could run with any DOHC offerings from the competition.. not only in terms of power, but in size (not displacement.. but physical size), fuel efficiency, and reliability. Going to DOHC is a huge paradigm shift for GM and must be because like the like the pushrod four cylinders they made until 2000 and the pushrod six cylinders they made until 2011, they have reached the developmental limit of pushrod V8s.
@@Bartonovich52 agreed man the pushrods are maxed out. Dohc is going to make more power more efficiency than the pushrod with less displacement. 5.5L N/A V8 making almost 700 bhp vs the ls7s 500 hp with 7.0L of displacement. Power delivery on this new engine should be interesting.
When a new car comes out, the thing I’m most excited for is the tuning scene. Especially whenever the new car brings something new to a genre of cars. We’re getting a flat plane in a corvette! That’s crazy. I’m excited to see how people respond.
Wow. Engineering is truly a spectacular work of art, I feel like digging into the exhaust system would really be an interesting video as well, to see how the scavenging looks downstream. Excellent video as always Jason
Really great to see all this tech going into a Corvette engine, in my opinion. Everyone loves a big 'ol pushrod V8, but seeing a high revving, DOHC, flat-plane crank engine going into a Z06 is pretty cool. And if it sounds anything like the GT-350R then we're all in for a treat with the exhaust note too! Great video
I signed up for the Z06 Sep 2020 and GM has exceeded my expectations! What impressed me, according to Tadge Juechter the Z06 w/ the ZO7 option, “Will hang with the C7 ZR1 for quickest lap of a session, but if you look at the average lap over a full tank of fuel, the C8 Z06 will be quicker.” He went on to say that the difference in Z06 lap times over a session is zero, even negative. Sometimes the fastest lap of the day was the last lap. IMHO this Z06 truly is the whole package!
@@turtlegaming3829 Absolutely! The C7 Z06 is a fantastic car, enjoy! Be safe! Put it this way, you will be having fun driving while us in line will be waiting, and waiting, and waiting some more!
I just love that in this current EV craze GM is like here you go, the most powerful NA V8. They could've just stuck a supercharger on the LT2 and called it a day and it would've been fine. Bigger news to come when the ZR1 is released.
Once EV's become ubiquitous, an entire 50-70 year era of building and customizing combustion engine vehicles to express personal styles, and produce desired levels of horsepower will become a quickly forgotten period/blip of time. Cars will be entirely utilitarian, and devoid of any character, personality, or any reason for a person to customize it. Mechanics will no longer be necessary, and those skills will be tossed in the dustbin of history. It wont take long for people to forget this era entirely. It makes me sad.
@@kidwave1 the president of the company that made the BAC mono had an interesting view on this. If you take today's most focused supercars like this c8 z06 or a 992 gt3 they still compromise the driving experience for daily useability. He compares this to horses. Today's through breds would be terrible horses for the average person to own. They don't pull heavy stuff are fast and jump high. After the horse was released from being a utility it gained a second life as a tool for pure fun. I'm pretty sure this is going to be the future of combustion cars
@@memememine1 that would be very acceptable compared to the prospect of outright banning them. Which, although that would do almost nothing to help against climate change, seems to be a part of the agenda.
What a great motor! I've always been a loyal and appreciative fan and owner of Chevy's, and I love my 2004 C5 Corvette. I can't wait to buy the 2023 Corvette, adding another to the stable!
Very impressed with this level of details on how this engine works. I can't wait to see it on the road! Can't help but think when they unleash the ZR1 version it will be the hottest car for a long time.
"Larger" should always be explained between DOHC and push rod stuff. The old engine may be bigger in displacement but push rod stuff is usually physically compact in comparison.
True, this is why LS swaps are so popular, the old engine is big on displacement (and TQ) but small in size. You can fit an LS into a 911 or a Miata. However with the C8 moving to mid-engine they had more height to work with since they were no longer worried about needed a tall hood. Still a DOHC LS? The temperature in hell dropped a few degrees LOL
@@johnmoore3504 Yup, that's why I'm wondering what applications this one will ever have in the aftermarket due to packaging restraints. Especially the intake and exhaust systems. Super cool motor though. I thought they may even have to eliminate the rear trunk to maximize performance but I guess not.
@@bobhenry6159 The point is not everyone knows that when you say one is much larger than the other. If your coming here to learn and someone says the old LS is much larger in displacement would they be surprised in the size comparison when you put a Coyote next to an LS variant of whatever displacement (especially a 427)?
Great explanation as always. Thanks for bringing out the whiteboard! This Z06 is an incredible piece of mechanical engineering. I am so glad we got it just sad it is coming out in the twilight years of the internal combustion engine. 😢
Na internal combustion isn't going away anytime soon. The ban on gas and diesel engines in Europe was held up until the provision to allow for vehicles certified to run on fully synthetic, carbon neutral fuels to be sold. There are more and more pains being discovered with increasing electrification coupled with rising energy costs that are decreasing the 'cost saving' angle of owning an EV. If anything, the EV scene is pushing the ICE side to work harder to be better.
High strung N/A engines really don’t do well supercharged, look at the LS7. My guess is the compression will be too high for a reliable forced induction application
@@kingssuck06 Compression ratio isn't the limiting factor, us the proper fuel IE E85 problem solved. Look at the 5.0L Coyote 12.5:1 Compression ratio N/A on E85 you can easily run 20 psi boost.
Whoa, impressive to match Cosworth's BMEP. The question is the grunt factor? (Torque) My guess is that with the free sprung reciprocating weight the car will still pull as if it had 650 FP of Torque? 2.6 sec zero to sixty is Porsche Turbo numbers. Nice job. 👍
I was really excited when I first heard this then realized that they changed the engine completely and I just love the feel and power band of the normal gm engines. Like that 6.5 redline was always so nice in the way that the power band worked. Not sure how I feel about this but I guess we’ll see if I ever get to drive one of these new ones
I don’t think you actually lose almost any driveability or even feel compared to the sluggish old design. The main difference is that you have 2k more RPM to play with, and therefor more HP. The torque will likely be very similar in the lower RPM.
Love your engineering explanations. Coincidentally, I was just talking about how Chevy would have to get over the pushrod engine and move to an OHC engine and then, sure enough, they packaged one of the most impressive NA engines I've seen. I'm a huge fan of NA engines and have had 2 R8's which I love for their small package, high revving engines. I wish I could afford a Cogsworth small packaged V12 as their engineering is incredible. Congratulations to Chevy for building such an impressive engine. I hope that they are able to ditch the satin jacket/gold chain negativity for this incredible car.
Wait, what? I JUST received my new satin jacket (with matching pants) and gold chains in anticipation of ordering my C8Z06! And no chest shaving for 6 months too! Dammit!
Love the car window explanation about Hemholte resonance. You said we don't have to understand how those middle valves work to see the benefit, but if you've ever cracked your driver's window to offset the resonance caused by your rear passenger's open window, you already intuitively know how it works.
Take a look at the intake valves, 2 of the 3 share a shaft. Your combinations should be 0 open, 1 open, 2 open (if you closed the single), or 3 open based on this. Best possible if packaging were to allow, would be, 0 open, 1 open front, 1 open middle, 1 open rear, 2 open (many combinations), and finally all open).
When the C8 was first announced I was blown away. I think this is the most impressive vehicle I’ve ever seen in my life. I like the C7, but the C8 is out of this world.
Can’t ask for a better delivery of deep engineering know-how using simple terms and focused graphics that most enthusiasts can grasp the refinement of the design. Great job EE! You’re a very skilled professional and a great teacher.
It never stops. Chevy makes some real strides in engineering and value and still people in the comments try their hardest to minimize or poo-poo it. This is an accomplishment for a U.S. manufacturer and I'm impressed, especially considering the price point.
USA has some of the greatest engineers but a car is more then a engine. C8 brake issues, lack of quality stitching in leather. I understand it's a value but still this car better get everything right or we will never be a class act.
Gt350 did the same thing was the most powerful N/A V8 at the time. Flat plane crank naturally aspirated V8 revs to 8250 Even came with carbon fiber wheels a magic 6 speed transmission.
@@eleventy-seven Please provide some links to more information on these brake issues and stitching. Once again, someone else to poo-poo the car. Thanks for demonstrating my point.
“Now we have dual overhead camshafts with 4 valves per cylinder. Truly the future” hey, literally every car and motorcycle manufacturer from 1990s Japan called, they said the future was 30 years ago.
It's, uh...it's a joke. American manufacturers aren't exactly known for keeping up with the technological curve. If it ain't broke, sell it as new with a twenty percent markup, you know?
When you discussed the difference in airflow, why did you not point out that a good fraction of the 6.2L’s higher airflow is used to generate power to run that supercharger? Critical difference between NA and mechanically forced induction engines.
I was surprised that he didn't elaborate that the 5.5L motor has higher power than the 6.2L even with less L/min because combustion does not create power, it creates torque. Power is a function of torque x rpm / 5252. This means past 5252 rpm, you need less torque to make the same amount of power. I believe this more than makes up for the gap, especially when you consider parasitic losses from the supercharger.
I learn something every time I watch and I love that! Love your insight and the way you explain the details of everything. Thanks for another fantastic video
Engineering explained, Jwason i did not know you are a Chevy guy. Cool, this is good news 👍. Now you can talk about cadillac. Ya' the newer one's. 2005-2020 Thanks Jason..!
I wish GM put as much effort into some of its smaller motors as they did here. My buddies shop has at a minimum of 2 GM products in for extensive motor work or full replacements. Primarily the 3.6L V6, 1.4/1.5T and the 2.4L
Generally avoid non v8 American cars. That being said, the Buick 3800 was good and the 4.2 v6 in my f150 work truck only needed a tune up in 12 years after a trip cross country. I’d still have it but it got totaled.
@@Suction_ yeah, the Equinox never got the LE5. The first gens were all 3400-based V6s and then the High Feature V6, and the 2nd gens got the LAF and LEA. The latter two engines being direct-injected and the E85-compatible version respectively.
Hey man, I have a 2.0 LTG Turbo engine with 175,000 miles on it. The car still feels brand new, it just needs small repairs here and there. I’ve replaced cooling system items, coil packs, some seals here and there, but the thing is still going strong!.
You are so right: this is the first REAL mid engine Corvette. I so long have been going WHY? Why still valley camshaft with ports choked by a pushrod picket fence ?! Now, Chevy did more than a token OHV V8.... they built a world beater, and future hot rod legend core. Thank you GM for doing something right. Please do manufacture it in the USA, so your/our workers can afford to buy one.
I liked the detail offered in this video and I’m excited that the ICE technology continues to advance. Thank you for a great presentation. Any chance of a follow-up that focuses on the weaknesses and/or compromises in the engine design?
The engineering is absolutely fascinating. The engineer describing the engine did a fabulous job of describing the engine. I'm in love with the car already....like so many.
I also hear this new Z06 has something like 5 heat exchangers on the front with all that Aero! If you get some more requests I'd be VERY interested to learn how they link them to the engine which is in the back of the car! Great video Jason! 🍻
@@TurboCarSlut that's a safe educated guess but it'd be neat to do a breakdown of how they engineered everything in Engineering Explained in depth fashion!
There are three heat exchanges up front and two in the rear that are cooled by the air that enter the side inlets behind the doors. The three in front work in tandem.
Having watched the Chevrolet video on the Z06 and wondered why basketballers and shoe designers were trying to tell me how awesome this car was going to be without any technical details or any real details at all to back that up. This video clearly provides evidence on the actual engineering that has been put into this car. Great work!
This video just drives home how creative and intelligent our modern engineers really are. I can't even begin to imagine the tight tolerances required to achieve an engine of this nature. Any tighter and more precise, and we'll be down to single-atom sized tolerances, lol.
Hey, you guys don't think this engine would get worn badly in 3-5 years, do you? ... come to think of it, it's in a tuned version by factory - Factory tuned engine.
10:08 You did a video on the 992 GT3 engine and how it takes advantage of pressure waves to create higher than atmospheric intake pressures- is that also Heimholtz resonance? Same idea here?
I doubt it as heimholtz typically involves the cavity portion having lower air pressures so that moving air is drawn in but never really breaks to being over pressured.... there may be a way to do it with valves like Chevy does with the cross body valves and increasing the opening affecting how air flows into and out of the cavity... but I have a feeling it's likely an inverse function of heimholtz that naturally deals with the cavity having higher air pressures relative to atmosphere.
Respect. Finally showing the world what they can. One can see they really want to be recognized on the world wide parkett with a serious sports car and not a ditch reorganizer.
Great video. I worked at GM Tech Center Dyno row with the team developing the small block V8. Excellent engineers, all really committed to making the best. I feel confident that this is the last flat crank GM will ever produce since it will be the last Corvette generation that has an ICE. the Pinnacle of ICE engine development. Like Big Boy 4014, the last of an era.
As an engineer, car lover and just plain all cool mechanical thing lover... your channel is the best! Hemholtz resonance???? you talk about it like this is normal conversation with you. sitting at dinner discussing Hemholtz theory.
Once EV's become ubiquitous, an entire 50-70 year era of building and customizing combustion engine vehicles to express personal styles, and produce desired levels of horsepower will become a quickly forgotten period/blip of time. Cars will be entirely utilitarian, and devoid of any character, personality, or any reason for a person to customize it. Mechanics will no longer be necessary, and those skills will be tossed in the dustbin of history. It wont take long for people to forget this era entirely. It makes me sad.
@@GroundhogzGarage That will change in 10-15 years. I'm only 26 so chances are I will see this happen or come close to it. Almost every top manufacturer has promised to stop or almost stop producing combustion engines by around 2035. Whether they do or not is a better question.
GM has been on top of the performance/H.P. chart, while outperforming everybody's "high value" OHC engines. This truly is an impressive engine. This has to be very costly to produce, I can't imagine this engine being in very many "affordable" models anytime soon. The awesome earlier GM/Lotus LT5 didn't stick around long.
Yeah. Maybe history will repeat and in ten years GM will pull an "LS6," and we'll get the same or better performance, plus better fuel economy and lighter weight, in a much more affordable engine design. (One can dream)
Dodge has the best value for HP with its engines/cars. Dodge has the best per HP per Dollar spent. You can get a wide body Demon for 85k. Brand new in 2020 with 808 HP. You can then choose the high octane output option in the car and with the higher octane, get over 900HP. Under 90k with 808-900 HP. Quarter mile in. 9.64 seconds and the super stock version is. 10.4 seconds quarter mile. 0-60mph in, 3.45 seconds. Lol all of that for under 90k. Most cars with that type of power and even less power are well over 100k sometimes into 200k lol.
Around the 4:14 mark when Jason mentions "Clever ways to get more air into the engine". I'm pretty sure he is talking about "Resonance Supercharging" which is a possible side benefit of having the flat plane crank instead of the cross plane crank design. The 2023 Z06/Z07 oil containment system alone is breathtaking. It makes the old dry sump system on my LeMans block C5R 427 Gen IV Trans Am look like a T-Rex at a Flintstone's Pterodactyl wing eating contest .
I'm a diehard Mopar guy, mostly due to aesthetics. I also typically like the HEMIs of course. But I will say ever since the Corvette came in a mid-engine package, I've wanted one. I think Dodge made a HUGE mistake in never releasing a mid-engine Viper. Trust me, this is one Mopar guy who's definitely watching this car. It'll come out right around the time my bankruptcy ends. Maybe it's time for bankruptcy #2??? LOL
congrates you told everything about it , but i think you missed something and that is the previous engine made a buff torque (650 lb) and this one makes (450 ) , so all the extra air that LT4 sucks are getting to make more instant torque , but LT6 made 450 and takes it up to higher revs and this is the key that lets the engine to make more power! and another thing , chevy employed scavenging and supercharging effects on this and was able to increase the volumetric efficiency to a brilliant number of 112% ! this means that this engine can have air in a cylinder more than the cylinder volume and without any force induction .... good job chevy ✌🏻
As a Chevy guy, this makes me sooo happy :') (edit): the fact that a V8 engine from The States can easily rev above 8,000rpm is truly mindblowing 🤦🏾♂️
@@morgan98801 umm, what about the ZL1? XD I see where you're coming from though. For the past 8 or 9 years, my bro and I have been waiting for them to dish *something* out. Maybe even a V10 variant of the Corvette, but that won't be necessary if we've got an engine putting out that much power without a turbo or supercharger, lol.
This is really cool! I can't wait to hear what it sounds like. The GT350 is one of my favorite cars because of its high revving flat plane crank engine. Actually, a video talking about and comparing them both might be interesting.
Very excellent job by the presenter. If I'd had an instructor as enthusiastic and able to provide me with the information I needed to ask an informed follow-up question I'd have become whatever he/she was teaching. Truly, a very nice job.
Hah, I now work at a GM Powertrain plant. Unfortunately, not for this engine. Its still beyond cool to see basic cast block, cranks and heads come in at one end of the plant, and watch them go through the milling/machining process through to final assembly. The number of CMM stations checking and reading down to the .0001 has thrown out my previous Big 3 scepticism. Big 3 can easily do as good as anyone else, its just the bean counters in HQ who always seem to want to push plant upgrades and even basic machine maint. to failure to keep production maxed out. Upgrade to newer equipment that will keep to spec or crank out an additional 10-20% production? Nah, we'll just accept looser tolerances, customer will never notice...
I'm not really surprised that the LT6 could match that Cosworth engine in BMEP. I would bet that GM spent a considerable amount more money developing the LT6 than Cosworth/Aston Martin did on that V12. GM is, after all, a significantly larger company and will likely sell more C8 Z06s than Aston sells cars in a year. I also wonder how much is shared with the engine that is in the C8 GT3 car.
BMEP is kind of an irrelevant metric from the driver's seat, and you can always make an engine with a higher one it's just a matter of throwing money at it. It's the automotive engineer's way of measuring dicks basically. What matters to the person buying and driving the car is what happens when you put your foot down, and that can usually be improved much more easily and cheaply by simply making the engine bigger or letting it rev higher.
@@meekrab9027 Yes, I knew that but, turning those RPM's for a 24 hour race is still an extreme durability test, and most definitely helps prove the street engine's durability. How often will the LT6 turn redline or even 7,500 RPM's on the street, even if it is raced down a 1/4 mile or autocrossed, compared to a 24 hour race? Car companies for years have used racing to improve engines and safety of cars for the street. As the saying goes, racing improves the breed. Just like recently, Nelson Racing Engines turned a Bonneville race LS 260 C.I.engine with a mild 1,200 HP at full throttle for 24 hours straight.Then diassembled it and the bearings looked excellent. That will never happen on the street or even racing. I rest my case!
@@meekrab9027 Did you really try to aktuaalllly.jpg someone by suggesting 1100 rpms higher on the street is going to be harder than the stresses on a race engine? 🤣😂🤣💀
Indeed " The idea of no hydraulic dampening on the valve train did not operate as intended , your engine needs repairs and you are no longer in the warranty period"
@Skip R 0-60 is said to be half a second faster than the Stingray. That said, this engine is not designed for the drag strip. It is for the track where high revs are an asset. But for better strip performance, the upcoming E-Ray will probably be the best bang for the buck.
It's interesting to see this now. I had a 1970 340 Hemi (edit: wasn't a hemi) with a flat plane crank that pulled to 7,000+rpm thanks to triple carbies (6-pack) and a Mopar Purple Mechanical camshaft. The flat plane cranks were used in the 340 V8s in NASCAR and some of these cranks were put in the 340s sent to Australia, which is where I got one. The 340 Hemi Bore/Stroke is 4.04"/3.31" and has a 10.5:1 compression ratio. This Chevy engine has a much better head and a higher compression ratio, but the philosophy looks the same. Pity the Chevy doesn't have Freevalve tech.
@Keith Haren UA-cam deleted my previous 2 replies, I think because I included some links to pics I just posted to my twitter account. People drive on the left here so I need car bodies with right hand drive. All the Chrysler bodies I used were a "Valiant", mainly Valiant Chargers.
Pretty crazy how Chevy goes from the Traditional OHV V8 to quad cam V8, great for power and fuel efficiency but it'll lack the massive amount of torque but it will be interesting to see how it goes with the new air intake system! I do wonder what it'll sound like
I’ve always been a GM guy but is it just me or did Ford already create a very similar engine with dual overhead cams and a flat plane crank for the mustang? Even still very impressive engine and horsepower numbers especially giving the displacement. Can’t wait to see what kind of numbers it might make with twin turbos!
@@chevytony122540 this engine has big problems Blowing up with only a small amount of mileage Cylinder blow by destroying seats and violating emission regulations
**Additional information!** Something I forgot to mention in the video - obviously, torque is down from the previous generation Z06. Power is ultimately the important figure, because you can make up for torque with aggressive gearing. You can get away with short (high torque) gearing because the engine revs high. New final drive ratio is 5.56:1, previous Z06 was only 2.41:1 (we don't know transmission gears yet). GM engineers say the engine really comes alive above 3,500 RPM. Below 3,000 RPM, not much torque, but part of the reason of keeping the engine large (5.5L is still very big) is so that down low it still has useful grunt.
*Edit 1:* It's "Helmholtz" resonance not "Hemholtz." Words are hard for me.
*Edit 2:* Should have mentioned, but two of the three center valves (intake manifold) share a common shaft (so they open/close together). So that gives you four possible combinations (all closed, all open, one open, two open).
*Edit 3:* At 3:31 I state the naturally aspirated engine will have better air density (for its given pressure). To be clear, the supercharged engine will certainly have a greater air density than the NA engine overall, however it's not as simple as looking at a ratio of the two engines manifold pressure, because the supercharged air will have a higher temperature, reducing oxygen density. Also worth pointing out, it takes power to run superchargers, so some of the additional air going into the supercharged engine is also being used to power the supercharger.
@@dohabandit I hope they didn’t borrow the chains off of their dohc V6 💥
10:30 it's Helmholtz resonance, there is an 'l' missing
@@FireEye-zd4fm Oh boy, great catch hahaha, thank you!
@@dohabandit is the new LT6 interference or non?
I had a 1968 Z28 302 cu in 470 HP at the crank. The 302 was the most advanced engine of it's day.
I worked as an engineer at GM for 7 years. The engineers were some of the most brilliant people I've ever met. Unfortunately, also the worst management I've seen.
yea management sucks at big companies. I work for a big engine company and the bean counters come in and ruin a perfect design over a few cents per part..... yea you saved money now. youll pay it out in warranty cost though.
I had a lot of projects with GM and you nailed. Top management is only there due politics. A bunch of leeches!
Yes there smart but also some of the dumbest people i have seen to i have had to fix many of there very smart ideas by rewoking there setup
You're mentioning the GM in the past, this beast wouldn't even exist in the old GM era.
@@vinnyfrench8108 I bet it wont have the same problem as the flat plane Voodoo engine.
You are a SUPERB teacher. I am not a gear head, just a guy who loves cars. The other reviews I have seen of the new Z06 engine left me without much gain. Your explanations and graphics were so expertly done even I could understand. The best instructors figure out ways to structure the information to maximize comprehension. You, my friend are the best of the best.
I always click your videos thinking, "ah, I actually don't care that much, but I'll see what Jason is talking about". Then I stay for the whole thing.
Haha, well I appreciate it! It's a pretty neat engine!
GM must have a few Jason’s on the design team
No one ever expected to see this long run from a low hp six in 53 to this monster in 2023!! its an insane engine!!!!😁
I had no idea that the ZO6 engine is so perfectly engineered to maximize performance and without turbo or supercharger!!!
They steal the engineering from ferrari
@@boscovich11 elaborate on that
@@boscovich11 they don’t steal from frerraii. Funny how farrai has nagnetic damping suspension on their cars and many other Europian cars that was designed by GM
@@boscovich11 they don’t steal from frerraii. Funny how farrai has nagnetic damping suspension on their cars and many other Europian cars that was designed by GM
@@stevehirsch4988 magnetic damping was used by citroen early 70's.
They bought a ferrari wrecked and did reverse engineering of the air intake manifold,there is the secret.
How they do such quantity of hp.
The runners and the cavities that share some interesting resonance.
Porsche now use this devices.
Aston martin Valkirie and many others,i think that were used commonly in f1 then in some supercars,thats the main reason there is no legal claim against car factories.
May be they have already more than 10 years or 15.
"Truly the future..." Loved that subtle jab.
It hurt me. Lol
I’m sure the teslarati will be cackling at that comment !
Too bad Toyota has BEEN had this technology! Dual overhead camshaft?! C’mon Chevy, it’s about damn time you realize it’s not the size of the engine, but the efficiency of it. Too bad this technology “future” technology is already dwarfed by Mazda’s Skyactiv-X engines. Why the hell didn’t Chevy copy Mazda instead of getting tech from a Toyota Prius?!!!! 🤦🏻♂️
@@iargueta1220 toyota and honda afaik makes more(also better) efficient engines then mazda
@@pettersaethre they probably used to, but if you haven’t heard of the new Skyactiv-X engines then I’m afraid you are wrong. I myself am a Toyota fan, but Mazda has always been the funner cats to drive and now with the new technology they have they might edge out Toyota. Toyota’s relies too much on its reliability and the cars have become boring. Kia is slowly crewing up and might even pass them
Ive known most of this stuff, just a tad more than "generally". This video explains things so well, that it solidified my understanding to a higher degree. Excellent, and thank you!
Ill be throwing arguments with real engineers one day, by watching Jason explain stuff.
I know little stuff so i google some things here and there and this helps out a bit more!
I feel smarter every time I finish watching one of your videos! Today, I learned what the annoying buffeting air inside a car with a window down at 60mph is called.
My boss just said last night, "I need to do a deep dive into this engine" (we are in the porting business for Chevys) and, Voila !
Love this channel !
you're fuckt, what are you gonna get 120% volumetric efficiency, I bet they left nothing on the table
Look at Honda porting.
@@StabyMcStabsFace you can't port a thin wall stack, you have to make a new manifold
@@ihatecrackhead ?? What does that mean
@@MichaelSmith-ye2mt power is gained by getting more air into the motor, more air means more fuels, means more bang. sometimes that just shifting the powerband
other option is to get there more efficiently, with less parasitic losses
this engine will be near perfect volumetric efficiency. there will be very little to work with, without needing special fuels.
plus they won't be porting anything really, it uses velocity stacks with thin walls, meaning, they will have to make new ones from scratch.
I predict a lot of work, for little gains
The way they handled the pressure waves in the manifold is mind blowing!
BMW has been doing that with the N52 three stage intake manifold since 2010. Too bad they gave up on the N52 in favor of more powerful but less engaging turbo four cylinder engines.
Mazda has something similar going on in it's exhaust manifolds.
BMW have even made a continously variable intake manifold length before.
What was mind blowin;: the simplicity of the explanation.
WOW. I love this engineering! Very creative, especially the valves that help the torque curve.
Yoooo the fact is revs that high is sick I love high revving V8 engines.
That intake manifold reminds me a little bit of what you talked about in the video about the Porsche 4.0L flat 6. I think it's a great to get some extra power without forced induction. Crazy engineering for some of the last ICE's. I'm glad they didn't go for a V6 like Ford
If I remember correctly they even got musical instrument's engenieers to design the intake on the LFA to make it sound better. It's amazing where the ICE has come
@@juanordonezgalban2278 Yes, Yamaha was part of the team. The LFA is amazing!.
Variable intake manifolds aren't new at all BMW had a three stage intake manifold in the 3 series 20 years ago. Someone else was probably doing it before that too.
You just made me realize that this makes more power than the Ford GT and has a quicker 0-60 time.
Nah fr doe V8 >>>>
GM has been hitting home runs with the corvette!! Its great to see them competing with "supercars" for a fraction of the price.
Nah it's still sold 2x msrp
The engine hits home runs when it blows up before it even run in
Kudos to GM. This looks to be a brilliant engineering effort.
Between this and the Blackwing, it's a great time to be an enthusiast.
Right! I'm so glad that they had the guts to actually put a manual in the Blackwing and have high hopes that they make the C8 Grand Sport in manual ONLY. It would be a perfect drivers car!
if only it was stick
excpept the gov clamping down and suing sports shops and tuners
An enthusiast with 80k in your pocket
@@hpmetabolics7558 They already explained why they won't put a manual in the Vette, and it's because they literally can't make their money back on it. Not nearly enough people choose them. The number of people who buy these cars for the feeling rather than the performance is tiny
You forgot to mention that the super charged engine loses power running the super charger. (It's a net positive, of course, but it explains why you have less power per liter of air than a NA engine)
Great point!
I was a bit shocked when I saw how much power they use, it can be as high as 20% of the total output. If I recall correctly, I saw a figure of 120 HP for the C7 Z06 supercharger. That's more than I ever use in my daily driver, and more than a 600 cc sport bike peak output. Dang! But as stated, it is a net positive. It makes me think about using hybrid drives for performance. If you could just drive your supercharger from an electric motor for short bursts of peak performance, what a huge gain you could achieve without even routing electric power to the wheels. The power will need to be returned to the battery over time, but removing the S.C. load for a 1/4 mile rip would be magic!
@@hondolane3125 Really it all depends on the application and the type oc supercharger, you can build some pretty efficient setups with a eithet a roots/screw or centrifugal blower.
@@hondolane3125 IIRC Audi and I think Mercedes both use a 48V battery system on some of their modern engines for specifically this purpose. They use an electrically driven supercharger. There is also a company that sells a kit to fit a 48V supercharger to basically any car that Cleetus used in a few videos for fun.
@@Glarth-WC Well, there I go again with the right idea too late. In the early 50's when my dad was working crew for a stock car team, he thought it might be smart to put a wing at the back to use aerodynamic force to create more rear wheel downforce. Good idea. I'll have to comb Cleeter's old posts for that kit.
The science is sound, 4 valves per cylinder, high rpm configuration, high compression ratio, and enough cam duration and lift. If this thing gets a pair of turbos, it's going to be awesome.
Why would you ruin a beautiful normally aspirated engine with turbos?
@@JohnLee-db9zt One reason is to have the fastest C8 Z06. Another reason is so the owner of the C8 Z06 doesn't get embarrassed by a commoner in a turbo LS Fox body.
@@c0c0asauce If that’s your goal, then go ahead. 670 hp with 8600 rpm redline and gorgeous flat plane crank V8 sound is perfection IMO. Turbos will ruin that auralgasmic sound, linear response, and reliability.
@@JohnLee-db9zt No argument here. I have an 95 Miata so I know HP isn't everything. Response makes driving at any speed entertaining but there will always be people who just want to be faster than the other guy.
Rumor is the Zr1 will be this engined but TT and the Zora is the same + electric motors in the front
Jason: *mentions 'exhaust scavenging'
Subaru: "What's that"
Oh if Subaru would make a flat 8
Literal angels would sing
@@Heavywall70 It's been done, it was supposed to go in the SVX replacement, but canned, also a 12 cylinder, to race in F1, it nearly was the powerplant for Koenigsegg's, back in the day
@@Heavywall70 they could probably `stick` two together, like porsche did with their flat12 no limits race cars in the 70`s
@@nssherlock4547 that flat 12 was a dog!
@@pettersaethre I’d buy that
I’ve owned a few Soobs and I love the flat motors
Gotta hand to chevy! Never thought they’d do something like this
👀
What? Look at the ls9 wich was the one of the most powerful v8s ever made with a 560hp n/a with a capability of holding 30psi boost wich means back in 2007 this engine could have 1010hp with just adding a supercharger
@@jefferysant1770 the ls9 is supercharged…..
Neither of you know what you’re talking about
LS9: 2008, 638hp, 2300 supercharger
They didn't. They outsourced and paid the people who actually know how to build a proper car. They just use all the money they save from building their other vehicles out of Chinese parts. American made my ass.
Last time the Z06 came out, everyone was hyped about the new power and new interior, then I saw all the owners at the dealerships with serious problems.
Let's hope history doesn't repeat itself.
As a UA-camr myself I know how hard it is to film and edit. And I know that taking requests for unplanned videos is not going to happen BUT I'm asking anyway. I'd love to see a video comparing the new LT6 Engine VS the Ferrari 458's F136 Engine. 😎🤙
You mean lt6🤣
@@allanb3222 yup lol. This is why you wait until AFTER coffee to post! 🤣
@@nfareview touché lol
I'd also like to see this comparison. But, I'd also like to see it compared to the ford gt350 Voodoo engine.
Adam you gotta start doing suppressor engineering explained videos with this dude
Talking about the DOHC setup as being the future reminded me of the C4 ZR-1 with the Lotus LT-5 that had DOHC in the 90's
Sad GM never used it again until now
I mean, GM probably built a million or so Northstar V8 powered cars....
Yea they never uses that LT5 after the C4ZR1 because when they came out with the LS1 it made better low speed power and drive much better.
Had to really take the LT4 up in the range to really feel any difference. LS1 was very cheap to produce compared to LT5 also.
Yeah I was like "did you just make a big deal about DOHC?"
I really hope Jason isn't starting to drink manufacturers Kool Aid.
DOHC is a big deal when you are talking about the king of pushrods.
What is amazing about GM is not that they had DOHC engines 30 years ago like the LT5, Quad 4, 3.4 DOHC, and Northstar…
It’s that they all but completely abandoned them for any engine with more than one head and made pushrod engines that could run with any DOHC offerings from the competition.. not only in terms of power, but in size (not displacement.. but physical size), fuel efficiency, and reliability.
Going to DOHC is a huge paradigm shift for GM and must be because like the like the pushrod four cylinders they made until 2000 and the pushrod six cylinders they made until 2011, they have reached the developmental limit of pushrod V8s.
@@Bartonovich52 agreed man the pushrods are maxed out. Dohc is going to make more power more efficiency than the pushrod with less displacement. 5.5L N/A V8 making almost 700 bhp vs the ls7s 500 hp with 7.0L of displacement. Power delivery on this new engine should be interesting.
I can’t wait to see what this engine does at Lemans!
This is the engine I've been waiting for GM to release. High revving, flat plane, DOHC V8.
It's the perfect engine for the mid engine platform.
@@Alkatross now they just need to mate it with an awd system and a 3 pedal set up for some serious fun.
The engine is very impressive
They must be very proud.
@@F0XD1E Definitely
@@F0XD1E reverse engineering ferrari engines
When a new car comes out, the thing I’m most excited for is the tuning scene. Especially whenever the new car brings something new to a genre of cars. We’re getting a flat plane in a corvette! That’s crazy.
I’m excited to see how people respond.
This is one of the best ‘explanation videos’ that I’ve seen. After watching….I understand. And, I’m not an engineer!!! Very well done.
My thoughts exactly.
Wow. Engineering is truly a spectacular work of art, I feel like digging into the exhaust system would really be an interesting video as well, to see how the scavenging looks downstream. Excellent video as always Jason
Really great to see all this tech going into a Corvette engine, in my opinion. Everyone loves a big 'ol pushrod V8, but seeing a high revving, DOHC, flat-plane crank engine going into a Z06 is pretty cool. And if it sounds anything like the GT-350R then we're all in for a treat with the exhaust note too! Great video
pushrods make an engine small
@@lorddoobsworth144 Which lets you fit a larger displacement engine in the same space.
I signed up for the Z06 Sep 2020 and GM has exceeded my expectations!
What impressed me, according to Tadge Juechter the Z06 w/ the ZO7 option, “Will hang with the C7 ZR1 for quickest lap of a session, but if you look at the average lap over a full tank of fuel, the C8 Z06 will be quicker.” He went on to say that the difference in Z06 lap times over a session is zero, even negative. Sometimes the fastest lap of the day was the last lap.
IMHO this Z06 truly is the whole package!
I’m very jealous! I’ll just stick with my 2003 supercharged Zo6 for now 😄
@@turtlegaming3829 Absolutely! The C7 Z06 is a fantastic car, enjoy! Be safe! Put it this way, you will be having fun driving while us in line will be waiting, and waiting, and waiting some more!
I just love that in this current EV craze GM is like here you go, the most powerful NA V8. They could've just stuck a supercharger on the LT2 and called it a day and it would've been fine. Bigger news to come when the ZR1 is released.
Once EV's become ubiquitous, an entire 50-70 year era of building and customizing combustion engine vehicles to express personal styles, and produce desired levels of horsepower will become a quickly forgotten period/blip of time. Cars will be entirely utilitarian, and devoid of any character, personality, or any reason for a person to customize it. Mechanics will no longer be necessary, and those skills will be tossed in the dustbin of history. It wont take long for people to forget this era entirely. It makes me sad.
@@kidwave1 doubt it
@@kidwave1 the president of the company that made the BAC mono had an interesting view on this. If you take today's most focused supercars like this c8 z06 or a 992 gt3 they still compromise the driving experience for daily useability. He compares this to horses. Today's through breds would be terrible horses for the average person to own. They don't pull heavy stuff are fast and jump high. After the horse was released from being a utility it gained a second life as a tool for pure fun. I'm pretty sure this is going to be the future of combustion cars
@@memememine1 that would be very acceptable compared to the prospect of outright banning them. Which, although that would do almost nothing to help against climate change, seems to be a part of the agenda.
What a great motor! I've always been a loyal and appreciative fan and owner of Chevy's, and I love my 2004 C5 Corvette. I can't wait to buy the 2023 Corvette, adding another to the stable!
Very impressed with this level of details on how this engine works. I can't wait to see it on the road! Can't help but think when they unleash the ZR1 version it will be the hottest car for a long time.
"Larger" should always be explained between DOHC and push rod stuff. The old engine may be bigger in displacement but push rod stuff is usually physically compact in comparison.
True, this is why LS swaps are so popular, the old engine is big on displacement (and TQ) but small in size. You can fit an LS into a 911 or a Miata. However with the C8 moving to mid-engine they had more height to work with since they were no longer worried about needed a tall hood. Still a DOHC LS? The temperature in hell dropped a few degrees LOL
@@johnmoore3504 Yup, that's why I'm wondering what applications this one will ever have in the aftermarket due to packaging restraints. Especially the intake and exhaust systems. Super cool motor though. I thought they may even have to eliminate the rear trunk to maximize performance but I guess not.
@@bobhenry6159 The point is not everyone knows that when you say one is much larger than the other.
If your coming here to learn and someone says the old LS is much larger in displacement would they be surprised in the size comparison when you put a Coyote next to an LS variant of whatever displacement (especially a 427)?
Not really true, because the intake components can be packaged inside the V in an OHC engine unlike in a pushrod
@@loludied552 Well they did it on a Mustang but it compromises the flat crank advantages. Jason Camissa did a quick video on it I believe.
Great explanation as always. Thanks for bringing out the whiteboard! This Z06 is an incredible piece of mechanical engineering. I am so glad we got it just sad it is coming out in the twilight years of the internal combustion engine. 😢
I miss my steam powered car.
I miss my horse powered carriage.
I miss my rickshaw.
I miss my palanquin.
Na internal combustion isn't going away anytime soon. The ban on gas and diesel engines in Europe was held up until the provision to allow for vehicles certified to run on fully synthetic, carbon neutral fuels to be sold. There are more and more pains being discovered with increasing electrification coupled with rising energy costs that are decreasing the 'cost saving' angle of owning an EV. If anything, the EV scene is pushing the ICE side to work harder to be better.
Great explanation, can't wait to try twin turbo it!
Coming from most people that would be a dream, but from you I know it is a promise !
High strung N/A engines really don’t do well supercharged, look at the LS7. My guess is the compression will be too high for a reliable forced induction application
@@kingssuck06 change the Pistons
@@kingssuck06 Compression ratio isn't the limiting factor, us the proper fuel IE E85 problem solved. Look at the 5.0L Coyote 12.5:1 Compression ratio N/A on E85 you can easily run 20 psi boost.
You will need to change much of what this engine is to efficiently turbocharge it. This engine was built to be the pinnacle of N/A V8 engineering.
Whoa, impressive to match Cosworth's BMEP. The question is the grunt factor? (Torque) My guess is that with the free sprung reciprocating weight the car will still pull as if it had 650 FP of Torque? 2.6 sec zero to sixty is Porsche Turbo numbers. Nice job. 👍
Chevy says it has almost 80kpa of vacuum in each crank bay. Whatever that means.
@@raymonds7492 kpa is kilopascal its a measurement of pressure like psi. 80kpa = 11.60302psi
"free sprung reciprocating weight" isn't a thing. I think you meant low rotational inertia.
I wonder if that 2.6 second time is with 1 foot rollout or not
I’ve heard 460ft lbs in a couple videos, one of which was with a Corvette engineer.
I was really excited when I first heard this then realized that they changed the engine completely and I just love the feel and power band of the normal gm engines. Like that 6.5 redline was always so nice in the way that the power band worked. Not sure how I feel about this but I guess we’ll see if I ever get to drive one of these new ones
I don’t think you actually lose almost any driveability or even feel compared to the sluggish old design.
The main difference is that you have 2k more RPM to play with, and therefor more HP. The torque will likely be very similar in the lower RPM.
Looks like GM knocked it out of the park with this engine. Nearly hellcat levels of power on pump gas NA. Should be a monster of a car.
C7 zr1 lost 101 horsepower from flywheel to rear wheels, let’s see the dyno on this thing
@@CoyoteFTW should be a bit less loss than the c7 that given the engine location of the c8. I'm excited to see the Dino results at some point.
@@CoyoteFTW hellcats loose about 70~80HP to the wheels.
@@CoyoteFTW Every car has parasitic loss.
@@CoyoteFTW And the supercharger on the C7 ZR1 required about 110 hp to operate at the top of the curve.
Love your engineering explanations. Coincidentally, I was just talking about how Chevy would have to get over the pushrod engine and move to an OHC engine and then, sure enough, they packaged one of the most impressive NA engines I've seen. I'm a huge fan of NA engines and have had 2 R8's which I love for their small package, high revving engines. I wish I could afford a Cogsworth small packaged V12 as their engineering is incredible. Congratulations to Chevy for building such an impressive engine. I hope that they are able to ditch the satin jacket/gold chain negativity for this incredible car.
Im also impressed, how struck to the roots to how engineering marvel they have become
Check out mercury marines version of the LS that they converted to ohc. Makes good power. Perhaps they worked together. Maybe not. SB4
Don't forget the 1990 - 1995 ZR1 Corvette with overhead cams.
I'm a little sad it's not a true LS pushrod style engine but at the same time OHC is just the way to go...
Wait, what? I JUST received my new satin jacket (with matching pants) and gold chains in anticipation of ordering my C8Z06! And no chest shaving for 6 months too! Dammit!
Love the car window explanation about Hemholte resonance. You said we don't have to understand how those middle valves work to see the benefit, but if you've ever cracked your driver's window to offset the resonance caused by your rear passenger's open window, you already intuitively know how it works.
A good ‘old school’ EE video, with math and stuff. Loved it!
Take a look at the intake valves, 2 of the 3 share a shaft. Your combinations should be 0 open, 1 open, 2 open (if you closed the single), or 3 open based on this. Best possible if packaging were to allow, would be, 0 open, 1 open front, 1 open middle, 1 open rear, 2 open (many combinations), and finally all open).
Correct, I do believe two share as shaft - should have mentioned!
Thank you GM for giving us tge C8, and for giving our boy here so much info to relay!
When the C8 was first announced I was blown away. I think this is the most impressive vehicle I’ve ever seen in my life. I like the C7, but the C8 is out of this world.
I want cars with small but high revving engines again for the streets!!
Its going to be more complicated and expensive though.
For the streets you are better off with the opposite. Torque for the streets and hp for the track
*sad Civic SI noises*
@@Shiftheads This is true but some people just prefer reaching for the power and having to rev high on their way to work.
High revving does nothing.
As always Sir, you leave out the chatter others rely on and explain specifically why it works better. Nice.
Great explanation! Just put my name on an allocation list :)
Man thats awesome! Enjoy it! Which options you getting? Z07 pack? 😀
At least no 6-12mo wait for the multiple silencers that will come with it!
@@mv3380 Black on red Z07 is what I’m ordering
@@brettkoski 🤣 well maybe! It won’t be in until 2023 lolololol
Me too I'm also on the allocation list for the 911 gt3 touring at 5 different dealerships
COOLEST engineering video online right now. Makes me want to buy a car just for the engineering involved in it!!
Can’t ask for a better delivery of deep engineering know-how using simple terms and focused graphics that most enthusiasts can grasp the refinement of the design. Great job EE! You’re a very skilled professional and a great teacher.
It never stops. Chevy makes some real strides in engineering and value and still people in the comments try their hardest to minimize or poo-poo it.
This is an accomplishment for a U.S. manufacturer and I'm impressed, especially considering the price point.
They did the same with he HellCat drive train, tried to poo poo it because it's an American design.
USA has some of the greatest engineers but a car is more then a engine. C8 brake issues, lack of quality stitching in leather. I understand it's a value but still this car better get everything right or we will never be a class act.
Gt350 did the same thing was the most powerful N/A V8 at the time. Flat plane crank naturally aspirated V8 revs to 8250 Even came with carbon fiber wheels a magic 6 speed transmission.
@@CoyoteFTW ummm no. GT350 makes no more power than an LS7 on the dyno and is slow as hell.
@@eleventy-seven Please provide some links to more information on these brake issues and stitching.
Once again, someone else to poo-poo the car. Thanks for demonstrating my point.
“Now we have dual overhead camshafts with 4 valves per cylinder. Truly the future” hey, literally every car and motorcycle manufacturer from 1990s Japan called, they said the future was 30 years ago.
I believe Renault was first, back in the 20's or 30's. 😄
Look inside an Allison V-1710 or a Rolls Merlin some time.
It's, uh...it's a joke. American manufacturers aren't exactly known for keeping up with the technological curve. If it ain't broke, sell it as new with a twenty percent markup, you know?
Aaah,,,,,Ford has been doing two cams per head, 4 valves per cylinders for a long time,,,,,welcome to the present GM.
@@2003evodave and look how bad GM just crushed Ford with the same technology.
Finally! A optimal explanation of a wonderful engine from GM - from the grandson of a Fisher auto body engineer.
When you discussed the difference in airflow, why did you not point out that a good fraction of the 6.2L’s higher airflow is used to generate power to run that supercharger? Critical difference between NA and mechanically forced induction engines.
Yes, great point! Superchargers are parasitic.
@@EngineeringExplained A supercharger somewhere resents that remark.
@@sydneyACE But knows it is true.
I was surprised that he didn't elaborate that the 5.5L motor has higher power than the 6.2L even with less L/min because combustion does not create power, it creates torque. Power is a function of torque x rpm / 5252. This means past 5252 rpm, you need less torque to make the same amount of power. I believe this more than makes up for the gap, especially when you consider parasitic losses from the supercharger.
@@wobblysauce I guess it has a guilt complex - that's why it's always trying to pay you back with more horsepower than it uses...
I learn something every time I watch and I love that! Love your insight and the way you explain the details of everything. Thanks for another fantastic video
Beautiful wedding photo bro 👍 I just got married 2 weeks ago
Engineering explained, Jwason i did not know you are a Chevy guy. Cool, this is good news 👍. Now you can talk about cadillac. Ya' the newer one's. 2005-2020 Thanks Jason..!
I wish GM put as much effort into some of its smaller motors as they did here. My buddies shop has at a minimum of 2 GM products in for extensive motor work or full replacements. Primarily the 3.6L V6, 1.4/1.5T and the 2.4L
Generally avoid non v8 American cars. That being said, the Buick 3800 was good and the 4.2 v6 in my f150 work truck only needed a tune up in 12 years after a trip cross country. I’d still have it but it got totaled.
What year 2.4Ls?
Because the LE5 was good, but that’s an engine that’s already almost 15 years old.
@@Quesadila21 modern ones, 2009 and up I believe. Primarily equinoxes
@@Suction_ yeah, the Equinox never got the LE5.
The first gens were all 3400-based V6s and then the High Feature V6, and the 2nd gens got the LAF and LEA. The latter two engines being direct-injected and the E85-compatible version respectively.
Hey man, I have a 2.0 LTG Turbo engine with 175,000 miles on it. The car still feels brand new, it just needs small repairs here and there. I’ve replaced cooling system items, coil packs, some seals here and there, but the thing is still going strong!.
Bore/stroke ratio for Yugo 1.1 engine is 1.44, and for 1.3 engine is 1.55 :D
this is one of the coolest YT vids I have ever watched. utterly fascinating
I’m sooooo hyped about this car man
You are so right: this is the first REAL mid engine Corvette. I so long have been going WHY? Why still valley camshaft with ports choked by a pushrod picket fence ?! Now, Chevy did more than a token OHV V8.... they built a world beater, and future hot rod legend core. Thank you GM for doing something right. Please do manufacture it in the USA, so your/our workers can afford to buy one.
Awesome engineering by GM and excellent presentation by you!
I liked the detail offered in this video and I’m excited that the ICE technology continues to advance. Thank you for a great presentation.
Any chance of a follow-up that focuses on the weaknesses and/or compromises in the engine design?
Your attention to detail is amazing and appreciate the explanation regarding all the mechanics involved, truly a masterpiece for GM, regards 💯
The engineering is absolutely fascinating. The engineer describing the engine did a fabulous job of describing the engine.
I'm in love with the car already....like so many.
“Dual overhead camshafts with four valves per cylinder - truly the future” Hehehe Carbon pushrods! 😂
I also hear this new Z06 has something like 5 heat exchangers on the front with all that Aero! If you get some more requests I'd be VERY interested to learn how they link them to the engine which is in the back of the car!
Great video Jason! 🍻
Hardlines under the car to hoses near engine and heat exchanger inlets/outlets.
@@TurboCarSlut that's a safe educated guess but it'd be neat to do a breakdown of how they engineered everything in Engineering Explained in depth fashion!
There are three heat exchanges up front and two in the rear that are cooled by the air that enter the side inlets behind the doors. The three in front work in tandem.
Having watched the Chevrolet video on the Z06 and wondered why basketballers and shoe designers were trying to tell me how awesome this car was going to be without any technical details or any real details at all to back that up. This video clearly provides evidence on the actual engineering that has been put into this car. Great work!
This video just drives home how creative and intelligent our modern engineers really are. I can't even begin to imagine the tight tolerances required to achieve an engine of this nature. Any tighter and more precise, and we'll be down to single-atom sized tolerances, lol.
Blows my mind.
Hey, you guys don't think this engine would get worn badly in 3-5 years, do you? ... come to think of it, it's in a tuned version by factory - Factory tuned engine.
10:08 You did a video on the 992 GT3 engine and how it takes advantage of pressure waves to create higher than atmospheric intake pressures- is that also Heimholtz resonance? Same idea here?
I doubt it as heimholtz typically involves the cavity portion having lower air pressures so that moving air is drawn in but never really breaks to being over pressured.... there may be a way to do it with valves like Chevy does with the cross body valves and increasing the opening affecting how air flows into and out of the cavity... but I have a feeling it's likely an inverse function of heimholtz that naturally deals with the cavity having higher air pressures relative to atmosphere.
Respect. Finally showing the world what they can. One can see they really want to be recognized on the world wide parkett with a serious sports car and not a ditch reorganizer.
Seems like a great engine. Let's hope it holds up over time since this is GM's first go at a flat plane crank production engine.
Great video. I worked at GM Tech Center Dyno row with the team developing the small block V8. Excellent engineers, all really committed to making the best.
I feel confident that this is the last flat crank GM will ever produce since it will be the last Corvette generation that has an ICE. the Pinnacle of ICE engine development. Like Big Boy 4014, the last of an era.
It's already race proven.
@@thethirdman225 you do realize the race engine has only around 500hp
@@shawness93 Yes, I know that.
True because this is another reason you'd pick a corvette over an Audi. Long term engine reliability.
I have an LT4 engine, love it, love the torque. I also live at 6,300 feet - any ideas on the power drop off when you live far above sea level?
As an engineer, car lover and just plain all cool mechanical thing lover... your channel is the best! Hemholtz resonance???? you talk about it like this is normal conversation with you. sitting at dinner discussing Hemholtz theory.
It's a bit sad that we haven't reaches the physical limits of combustion engines, and now we're switching to EVs.
Once EV's become ubiquitous, an entire 50-70 year era of building and customizing combustion engine vehicles to express personal styles, and produce desired levels of horsepower will become a quickly forgotten period/blip of time. Cars will be entirely utilitarian, and devoid of any character, personality, or any reason for a person to customize it. Mechanics will no longer be necessary, and those skills will be tossed in the dustbin of history. It wont take long for people to forget this era entirely. It makes me sad.
@@kidwave1 Swiss mechanical watches aren't dead. Combustion engines will be the hobby vehicles of the wealthy.
@@kidwave1
Doom and gloom.
Don’t worry, us enthusiasts are keeping it alive
EV sales in the US average 2% of total sales. You won’t live long enough to see the end of IC engines. No one reading this will.
@@GroundhogzGarage That will change in 10-15 years. I'm only 26 so chances are I will see this happen or come close to it. Almost every top manufacturer has promised to stop or almost stop producing combustion engines by around 2035. Whether they do or not is a better question.
GM has been on top of the performance/H.P. chart, while outperforming everybody's "high value" OHC engines. This truly is an impressive engine. This has to be very costly to produce, I can't imagine this engine being in very many "affordable" models anytime soon. The awesome earlier GM/Lotus LT5 didn't stick around long.
Yeah. Maybe history will repeat and in ten years GM will pull an "LS6," and we'll get the same or better performance, plus better fuel economy and lighter weight, in a much more affordable engine design. (One can dream)
Dodge has the best value for HP with its engines/cars. Dodge has the best per HP per Dollar spent. You can get a wide body Demon for 85k. Brand new in 2020 with 808 HP. You can then choose the high octane output option in the car and with the higher octane, get over 900HP. Under 90k with 808-900 HP. Quarter mile in. 9.64 seconds and the super stock version is. 10.4 seconds quarter mile. 0-60mph in, 3.45 seconds. Lol all of that for under 90k. Most cars with that type of power and even less power are well over 100k sometimes into 200k lol.
Around the 4:14 mark when Jason mentions "Clever ways to get more air into the engine". I'm pretty sure he is talking about "Resonance Supercharging" which is a possible side benefit of having the flat plane crank instead of the cross plane crank design. The 2023 Z06/Z07 oil containment system alone is breathtaking. It makes the old dry sump system on my LeMans block C5R 427 Gen IV Trans Am look like a T-Rex at a Flintstone's Pterodactyl wing eating contest .
3:37- Gale Banks has some videos on his channel explaining air density vs pressure and why air density is a more important parameter.
I'm a diehard Mopar guy, mostly due to aesthetics. I also typically like the HEMIs of course. But I will say ever since the Corvette came in a mid-engine package, I've wanted one. I think Dodge made a HUGE mistake in never releasing a mid-engine Viper. Trust me, this is one Mopar guy who's definitely watching this car. It'll come out right around the time my bankruptcy ends. Maybe it's time for bankruptcy #2??? LOL
Mid engine viper? I can only dream
Mid engine viper is basically a pre Aventador Lamborghini.
congrates you told everything about it , but i think you missed something and that is the previous engine made a buff
torque (650 lb) and this one makes (450 ) , so all the extra air that LT4 sucks are getting to make more instant torque , but LT6 made 450 and takes it up to higher revs and this is the key that lets the engine to make more power!
and another thing , chevy employed scavenging and supercharging effects on this and was able to increase the volumetric efficiency to a brilliant number of 112% ! this means that this engine can have air in a cylinder more than the cylinder volume and without any force induction .... good job chevy ✌🏻
As a Chevy guy, this makes me sooo happy :')
(edit): the fact that a V8 engine from The States can easily rev above 8,000rpm is truly mindblowing 🤦🏾♂️
@@morgan98801 umm, what about the ZL1? XD
I see where you're coming from though. For the past 8 or 9 years, my bro and I have been waiting for them to dish *something* out. Maybe even a V10 variant of the Corvette, but that won't be necessary if we've got an engine putting out that much power without a turbo or supercharger, lol.
@@morgan98801 GM does just fine. The Cadillac Blackwing is awesome, as is the ZL1 and vette. Not bad in a world filled with suvs and pickups
This is really cool! I can't wait to hear what it sounds like. The GT350 is one of my favorite cars because of its high revving flat plane crank engine. Actually, a video talking about and comparing them both might be interesting.
Very excellent job by the presenter. If I'd had an instructor as enthusiastic and able to provide me with the information I needed to ask an informed follow-up question I'd have become whatever he/she was teaching. Truly, a very nice job.
Proud to be Team Corvette!
Hah, I now work at a GM Powertrain plant. Unfortunately, not for this engine. Its still beyond cool to see basic cast block, cranks and heads come in at one end of the plant, and watch them go through the milling/machining process through to final assembly. The number of CMM stations checking and reading down to the .0001 has thrown out my previous Big 3 scepticism. Big 3 can easily do as good as anyone else, its just the bean counters in HQ who always seem to want to push plant upgrades and even basic machine maint. to failure to keep production maxed out. Upgrade to newer equipment that will keep to spec or crank out an additional 10-20% production? Nah, we'll just accept looser tolerances, customer will never notice...
Are the using laser trackers, arms, to measure or ??
As soon as I saw the Z06 specs, I knew you would feel out about BMEP. I bit of a shame you don’t bring up the 458 or S2K as comparison points
I'm not really surprised that the LT6 could match that Cosworth engine in BMEP. I would bet that GM spent a considerable amount more money developing the LT6 than Cosworth/Aston Martin did on that V12. GM is, after all, a significantly larger company and will likely sell more C8 Z06s than Aston sells cars in a year. I also wonder how much is shared with the engine that is in the C8 GT3 car.
And both are still behind the Ferrari 458’s BMEP:)
The engine they have been racing the C8R is detuned from the one that will be going in the Z06. IMSA rules limit power to about 550 HP.
@@andyharman3022 I suspected as much.
BMEP is kind of an irrelevant metric from the driver's seat, and you can always make an engine with a higher one it's just a matter of throwing money at it. It's the automotive engineer's way of measuring dicks basically.
What matters to the person buying and driving the car is what happens when you put your foot down, and that can usually be improved much more easily and cheaply by simply making the engine bigger or letting it rev higher.
@@BigUriel Bigger being the cheaper way than revving it higher!
The beautiful thing about the LT6, is it is already proven the durability in the C8-R in racing competition.
The race engine is airflow restricted and only revs to 7500 or so. The street engine is just getting started at that rpm. So no, not really.
@@meekrab9027 Yes, I knew that but, turning those RPM's for a 24 hour race is still an extreme durability test, and most definitely helps prove the street engine's durability. How often will the LT6 turn redline or even 7,500 RPM's on the street, even if it is raced down a 1/4 mile or autocrossed, compared to a 24 hour race? Car companies for years have used racing to improve engines and safety of cars for the street. As the saying goes, racing improves the breed. Just like recently, Nelson Racing Engines turned a Bonneville race LS 260 C.I.engine with a mild 1,200 HP at full throttle for 24 hours straight.Then diassembled it and the bearings looked excellent. That will never happen on the street or even racing. I rest my case!
@@meekrab9027 Did you really try to aktuaalllly.jpg someone by suggesting 1100 rpms higher on the street is going to be harder than the stresses on a race engine?
🤣😂🤣💀
@@someguy5035 between that and being limited to around 500hp, yes. It makes a huge difference
Fantastic video Jason, well done!
What a absolutely amazing engine.. I can just imagine how absolutely amazing it's going to be paying to get it fixed too lmfao
Indeed " The idea of no hydraulic dampening on the valve train did not operate as intended , your engine needs repairs and you are no longer in the warranty period"
@Skip R you forgot about gearing!
@Skip R 0-60 is said to be half a second faster than the Stingray. That said, this engine is not designed for the drag strip. It is for the track where high revs are an asset. But for better strip performance, the upcoming E-Ray will probably be the best bang for the buck.
@Skip R You don't see too well.
@Skip R mid engine!! Same reason Porsches barley make any torque
It's a pretty simple concept, does what the s2k and 458 italia do. Takes the torque higher in the ram range
My point exactly. Honda made 1.6 liter with 200hp if I'm not mistaken way back in like 2000. Same hp per liter range.
Thanks! I love the depth of your videos!
Chevy engineers have outdone themselves, fantastic flat plane crank V8, amongst the best engines 👌
It's interesting to see this now. I had a 1970 340 Hemi (edit: wasn't a hemi) with a flat plane crank that pulled to 7,000+rpm thanks to triple carbies (6-pack) and a Mopar Purple Mechanical camshaft. The flat plane cranks were used in the 340 V8s in NASCAR and some of these cranks were put in the 340s sent to Australia, which is where I got one. The 340 Hemi Bore/Stroke is 4.04"/3.31" and has a 10.5:1 compression ratio. This Chevy engine has a much better head and a higher compression ratio, but the philosophy looks the same. Pity the Chevy doesn't have Freevalve tech.
@Keith Haren oh yeah, my bad, I had lots of different Chrysler engines, forgot that one wasn't a hemi, but it was my favorite.
@Keith Haren UA-cam deleted my previous 2 replies, I think because I included some links to pics I just posted to my twitter account. People drive on the left here so I need car bodies with right hand drive. All the Chrysler bodies I used were a "Valiant", mainly Valiant Chargers.
Pretty crazy how Chevy goes from the Traditional OHV V8 to quad cam V8, great for power and fuel efficiency but it'll lack the massive amount of torque but it will be interesting to see how it goes with the new air intake system! I do wonder what it'll sound like
The car will be quicker and faster than any OHV engine car GM has ever made. It will sound like an exotic car.
Intake manifold explanation was great!
Can't wait to see this engine in an ultima chassis. Basically a group c car at that point
"cough" you're not serious are you?
@@bobolulu7615
Under 1000kg
Nearly 700hp
Bubble cockpit
Yeah pretty damn close to a group c car that can be driven on the road.
@@cameronmilne3590 Perhaps, but rough as guts. You seen one for real in the flesh? I have and it sure is no Ford or General Motors product.
I’ve always been a GM guy but is it just me or did Ford already create a very similar engine with dual overhead cams and a flat plane crank for the mustang? Even still very impressive engine and horsepower numbers especially giving the displacement. Can’t wait to see what kind of numbers it might make with twin turbos!
Different firing order and they made it more for tourqe and less for hp.
The vodoo is junk
@@chevytony122540 Sure it is... Unlike the cardboard copy from the C8 right?
@@chevytony122540 this engine has big problems
Blowing up with only a small amount of mileage
Cylinder blow by destroying seats and violating emission regulations
Very informative video about this remarkable engine. Thanks again Jason.
The C8 Z06 is definitely the champion here
Already my dream car💪🏼