How To Power Shift Correctly - Go Faster Without Destroying Transmissions
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- Опубліковано 27 лип 2024
- How Powershifting In A Turbo Car Leads To Faster Acceleration!
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Powershifting, no-lift shifting, or flat foot shifting is a method of changing gears in a manual transmission where you do not take your foot off the gas pedal. Unfortunately, this shifting method is very tough on clutches, so there's a right way and a wrong way of doing it. Cadillac, with the CT4-V Blackwing, has developed a methodology to powershifting that maintains boost pressure of the twin-turbo V6 engine, while reducing the engine load during the shift. This clever trick involves altering ignition timing, wastegate control, and the bypass valve control. In the end, the desired result is great - a seamless manual transmission shift, all without lifting your foot off the throttle.
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*Clarification!* Does the clutch still have to absorb the engine vs transmission speed difference during a power shift? Yes! But with the delayed ignition timing (or some tuners will use spark cut), you put the engine in a low load state, so that when you re-engage the clutch, absorbing the speed difference is easier because there's not a bunch of torque going to the clutch (it's instead being used to make exhaust pressure, to keep the turbos ready). And once the clutch is re-engaged, ignition timing goes back to usual and you're right back at full power.
My tune has a rev limit for flat foot shifting set below redline to mitigate the speed difference. Is that achieved in the same way as typical power shift ignition adjustment? And is it any better or worse for my trans?
This gadget is similar to the anti-lag system some rally cars use, isn't it? It produces beautiful backfires
@@hulk.agiota I'm pretty sure this is basically anti lag, just called different.
Isn't this thing just killing the turbocharger ? I mean delayed ignition.
@@Eugen-E I agree! If you're retarding timing during the power stroke then you're losing the affect of the turbo. Additionally, the exhaust valves are closed during the power stroke so that pressure is not going out the exhaust. I think he needs to rethink either his explanation or his reasoning because it doesn't make sense at this point to me.
Power Shift into R (short for Race) to unlock the high rev Range of your car
People say autos are fast but nothing beats a manual in R mode.
Money-shift if you wanna hit jackpot!
R for reverse ? Your gonna grind your gears!
@@outgrown3094 WOOSH!
@@outgrown3094 no, not R for reverse, R for race. Sheesh some people don’t know anything about real cars
Just so no one use confused. If you have an older car and want a good time you abuse that thing and slam it as fast as you can between gears while not lifting. Transmissions, diffs, clutched, are all replaceable but a lap time is forever.
I drag raced a 99 Corvette FRC and absolutely loved it. The car had heads, cam, intake, and full exhaust upgrades as well as a 150 wet shot of nitrous. I had 3M hardened shafts in the rear and a 4.10 gear set. The 4.10 set allowed me to run a 28” ET Drag in the rear and crosses the 1/4 at a perfect 6300ish rpm. I also installed a Lingenfelter two step that held two settings… one for launch RPM and one for shift RPM. I put the launch RPM at 4800 and was pulling 1.4 60 ft times. For the shift RPM I put it at 7400. It took a while to train my muscles to not lift to shift but I got there. The shift RPM cut fuel and the nitrous solenoid was wired to the clutch solenoid so when I press the clutch it would momentarily stop spraying nitrous although not fast enough an when I shifted I would get a fireball out the tail pipe. No shift racing is a lot of fun. I ran the car to a 10.3 in the quarter. I wanted to go for 9s on the stock rotating assembly and tranny (T56) but ended up with a family instead. 😂🤣😂
@@secretsquirrel572 those vettes are cool. Dad had one, and a smaller 90s camarobird (box of parts lol) with a V8 manual trans. Such a nice ride. Love GM V8 sticks
@@secretsquirrel572 I had a 00 C5 with stock 3:42's, a mild cam, and exhaust. Nothing like yours, but I used to power shift 3 to 4 because that dude topped out 3rd right before the traps. Always picked up mph/e.t. with the no lift shift over a lift shift. I feel you on the "train not to lift", it was hard overcoming all that muscle memory.
Lmao, spoken like a true time attack driver
Let me update this and say I have a grinding 5th gear after my last track day due to trying to slam 3rd and missing a few times lol. Did get a personal best out of the day though!
Engineering explained: “that’s called turbo surge, and we don’t want that”
Me: “but TuTuTu 😢”
It isn't bad unless it happens when you're on the throttle
turbo surge damage is often exaggerated and isn't really an issue if you're off the throttle
@@Lofi.z34 but i love that tututututu sound while im flooring it tho??
@@kepagu uhhh lol
There’s a huge difference between turbo flutter and compressor surge. People often get them confused for the same thing
I really enjoyed this video. I am 72 and thought I would try this out. Jumped in to my Mazda 3 manual shift hatch back. I pressed voice recognition and told the vehicle what were gonna do. The car started laughing told me to grow up. It threw on the 4 way flashers shut off the A/C and said take that !! And then it shut off after spewing some Japanese words at me.
Hahahaha!
My Miata rolled its pop-up headlights at me when I asked
My Evo said do you know how much a transmission cost.... Then finished the conversation with if you wanted to shift faster get a Evo x Mr
🤣🤣🤣
You’d be a great teacher, I know pretty much nothing about engineering yet I still understand this process perfectly, you explained it flawlessly
I used to do the same thing with my highly modified 73 Vette, no retuning, no retarding spark, yeah I guess the clutch took a bit of a beating but as you said it was worth it as long as your shift hand was a quick as your left foot and you had the revs high enough to where you could feel the resistance against the shift lever disappear. Once you felt that you could even downshift the car without using the clutch at all.
Hes a youtube teacher!
Couldn’t have explained it better myself . . . Hmm 🤔 wait? I couldn’t have explained this at all! Thanks Jason.
I shifted with my gas pedal flat on the floor a few times when I was in a tight drag race. It would mean a gain of a half car length against the competitor each shift. The car was a 65 Chevelle, 300hp 327, 4 speed muncie, and 12 bolt eaton posi rear bought new. 100k miles in 4 years and sold it when the USArmy shipped me to S. Korea in 69. No trans failures or rear diff failures. I did have to do two minor rebuilds on the engine. New rings the first time and a scorched rod bearing and broken rings the second time. Did not need reboring. Only had to polish the crankshaft after the rod bearing failure because I heard it and stopped the engine immediately. Easy and cheap to repair engines back then.
I can see power shifting making sense during a drag race, but why people think they have to do this as well when driving on public roads truely baffles me.
@@tjroelsma Because fun
@@Lofi.z34 Like Rolling Coal is fun?
Same here with my camaro and 67 ss chevelle
Every once in a while isn’t going to reduce the life of the synchros or clutch by any noticeable degree. If it was done continuously then you would get premature failure.
I never thought I would see the day that GM would simultaneously only sell Corvette with two pedals and offer a Cadillac with three!
GM (and most manufactures) have been doing this for years on the automatic transmissions. When you start tuning the ECUs you can see all the torque management settings you have to work with. The ECU reduces torque exactly as you explained, but pulling timing right as the transmission shifts. It's practically magic because it all works so smoothly you don't even fell it happening. Interesting they are applying it to manual transmissions now, really neat stuff.
Another well detailed explanation.. Thumbs up
did u ready the title ?
The turbocharged cobalt SS was an underrated car. I used to tune and do performance upgrades for the cobalt community of all sorts 10 years ago
The 2007 cobalt ss actually beats a 2006 boxter s, lotus exige s, and is very close to the Ferrari 355 and 2010 camaro ss around the nurburgring. I have a 2010 cobalt lt 2.2 and it's fun but not super fast, I bet the ss is really fun and fast!
No one gives the TC SS nearly enough credit. GM came out with it in 08...it took Honda until 2017? (I think) to make a car to even compete with it. Still to this day that car on ethanol with a downpipe will beat a LOT of cars. The only thing that pisses me off about that is GM CAN build cars like that...they just WONT build cars like that. And when they do...it's short production runs.
@@MeltingRubberZ28Automakers successfully lobbied to have the lion’s share of regulations apply to cars, but not light trucks, and then went all in on maximizing profit from light trucks.
This makes them much cheaper than they should be relative to cars, which has all but ended cars as the most popular motor vehicle.
And now our roads are way less safe with these massive, flip-prone light trucks that have zero bumper compatibility with cars or each other (cus it’s not standardized for light trucks), our emissions aren’t much better cus light trucks evaded so much regulation, we have no affordable or fun cheap cars (a civic type r hatchback is 45k!!!), and the few people who actually need work trucks are stuck in oversized pavement Princess piles of garbage that are gdi, turbo’d & exhaust recaptured within an inch of their lives (look at the failure rates on ford’s eco boost engine with its wet rubber timing belt).
But some CEOs hit their quarterly targets and left with huge payouts. So it’s totally worth it.
I’m glad you mentioned the supercharger toward the end, I’ve done it once or twice on my MX5 ND1 SC and the only difference I could tell was the smell of my clutch!
Jason, I wish you would put this much footage of yourself shifting in the garage without the engine running in every video
Talking about tesla ranges, but still vibin in the garage shifting gears 😂
Timely subject! I've been debating how the no lift shift worked when factored to the trans, clutch and engine. Well stated!! I'm a Twin Turbo guy so this should work well in my case. I'll consult my tuner on the timing/fuel cutoff in-between shifts @ the Red line. My monster clutch is pretty durable but I don't want to push the limits. Great video and perfectly explained! Thank you!
So complicated, i learned power shifting on my 2003 Fiat Seicento 1.1 :D the wheelspin on 2nd gear was insane. And the clutch set was like only 50 eur :D money well spent :D
Thanks for the info. Now do a Granny Shifting vs Double Clutching comparison video!
He has to be very careful not to blow the welds on the intake if he does that
@@SangheiliSpecOp or worse, dump your load of washers out of your glove box.
@@taylorsova1205 lmaooo
@@taylorsova1205 cinematic gold.
@@taylorsova1205 Followed by a DANGER TO MANIFOLD warning indicator just before the floor panels fall off....
Wow! You really went off on a tangent about turbos there.
Power shifting when I was racing my 428 Mach1 was simply holding the accelerator, barely hitting the clutch and slamming the shifter into the next gear. No one could ever catch me.
I hate turbos!
I'd hate turbos too if I constantly was losing to them
I've always wondered about this, thanks for the video.
Thank You for all of your videos that you did. I am enjoying all of them.
LOL - I love this! I used to do it with my 1964 VW. Drag racing with an NSU Prinz, it was effective. We called it power shifting. 40HP didn't spin too fast in the fractional second shift. You are way out over the edge with these systems that make it 21st century. thank you :)
This sounds like a good application for a hybrid system. Assuming the electric motor is still connected to the transmission with the clutch out, you could dump power from the engine into the electric motor during the shift. The engine could be making full power the whole time, and if the motor is strong enough to slow down the engine it could perfectly rev match the next gear for you.
You just describe the Honda CRZ
NSX does this, albeit with a 9 speed automatic. Same principal though. Electric motors filling in the turbo lag gaps.
Plus on an F1 car they have an electric motor on the turbo so the waste gates stay closed (while charging the battery!).
I absolutly loved this video! Fantastic explanation, bring more like this
Another great video brother. I was not aware of all the tech involved to accomplish this. Thank you
I have to "power shift" my 1.6 polo in summer days, because with AC on, the rpm drops too fast when I change gears so I cannot rev match the next gear afterwards... I have to keep a little bit of gas to slow down the dropping.. you have to do this if you want an absolutely smooth shift
At least it doesn't have rev hang!
That's simply how you properly drive a manual, you don't lift off completely on upshift, just enough to revmatch.
My previous car had extreme rev hang as well as instant rpm drops with the AC on...
It took all the fun out of driving a manual.
@@slowanddeliberate6893 Same my car drops hard when cold and/or AC on and crunchy shifts. Warmed up it shifts fine but with truck rev hang. Can be dangerous in some situations.
@@stephaneriviere3835 If you have to give it some gas on an upshift something is wrong with your car. Even a tiny 900cc 3cyl engine gives me plenty of time to upshift. No, it does not rev-hang. My dad's diesel loses RPM so slow i sometimes jerk forward a bit. For a downshift give it the same amount of taps on the gas as the amount of gears you're shifting down. 5th > 2nd is 3 taps. The length of the taps depens on how lazy the engine is.
Gosh, I love the whiteboard videos. Thabk you for making me love engineering
Ten minutes and 19 seconds to explain a quarter second action! Just love it! Besides, neither my Z3 or my Boxster or my 914 have turbos. And I pretty much do the 'no lift shift anyway'.
Love this video man. I was thinking the same thing when you referenced the cobalt ss
When I 1st learned this I also learned what it feels like to lift the front tires when you hit 2nd. It was on a Mazda RX4 rotary powered Sand Rail (front engine). June 15th 1988 right after a heavy rain....... yeah you never forget the 1st time that happens.
I highly doubt you popped a wheelie on a wet road
@@rhynes07 Wasn't a road, the dry flat lakebed of sand in the Fremont County Sand Dunes. When the sand is wet (spring of the year) you get max traction. The Goffer Off Road Club used that dry lake to put on their "Sand Drags" until the sand shifted in the mid 90's and it wasn't flat anymore. I learned to "stab a tree" out there as well...... but to tell ya the truth, I wasn't all that good on the tree. I'm better with a flag drop.
Get a 6th gen Camaro, they come standard with no lift shifting. An LT1 V8 455 HP for a little over $30K starting in 2016.
If you want no lift shift with turbo, get a 2017 or later 2.0 version.
Camaro is on the same Alpha platform as the Cadillac but budget friendly especially for mods.
Thats funny I was just looking at powershifting, and searched it on youtube and you just posted this yesterday. Thanks for the information I love your channel
Dude, great content, even children will understand, that means your explanation is simple and almost perfect. Keep up th good work!
Can you please do a video on Smokey's Hot-Vapor Engine? It's super interesting but I could never fully understand it. Thanks and keep up the awesome work.
I didnt know you could shift
Without lifting in new cars.
Learn something new everyday.
Thanks dude. 👍
I always thought with boost you cut ignition never fuel but i guess if you cut fuel completely you couldn’t have a lean condition. Great video love that you share your learned knowledge thanks.
Your a very talented man with the way you explain scenarios with word board and picture I easily get the understanding of your presentations
Well Done
Tony
On motorcycles "quick-shifters" have been available even from the factory for quite some time on some sport bikes. Probably easier with a sequential gearbox.
A dog box (what motorcycles have) is very different from a synchromesh transmission as you have alluded to
This is great until, having become accustomed to no-lift shifting, you return to driving a standard manual car.
Right? I was wondering why no one mentioned it, and had to scroll down some to find your comment.
The only logical reason why you'd drive like this is if you're trying to accelerate as fast as possible, ie at the race track. On normal roads, you would almost never do this. So it would never become habit.
You won't become accustomed to no lift shifting because you should only use it when you are as driving as fast as possible... sorry but you obviously still don't understand what it is 😅
@@saturndesigns2339 So I guess you've owned a car with no-lift shifting? Because I have. Tell me what the point is in using it when you're just driving normally. Why the hell would I need no-lift shifting when I'm at part-throttle, low boost, and shifting at 3000 RPM? Did you even watch the video?
Do you even drive a turbocharged manual transmission vehicle? I'm guessing the answer to that question is no, just based on the ignorance displayed within your comment.
@@rars0n did you even read his comment? lmfao
When you showed the initial onboard and then started to talk about the CT4 Blackwing, I got my hopes up that the Blackwing engine was going into a CT4.
Instructions unclear, transmission fell out
Love the look of the new Cadillac models and love the manual option.
Sort of like a motorcycle quick-shifter and autoblipper.
Allows for clutchless up shifts while maintaining wide open throttle.
Momentarily cuts spark while the transmission changes gear.
Then on downshifts does the same thing but rev-matches (blips) also.
I’ve had this on two bikes and it is a really nice feature.
Not only for screaming through the gears while never letting of the throttle.
It allows for extremely fast shifts with no hesitation in the power.
But also for ease of riding.
Only have to use the clutch at stops and starts, but can always use it whenever you want.
Great video as per usual. As a Brit I'm jelous you can still discuss this kind of thing! Performance cars with manul transmission are becoming very rare in
Europe. The outgoing BMW M2 is one of the few, although mosat wre sold with DCT. Porsche sill offer manuals of a couple of their models. At least we have the Mustand GT in the UK.
My synchros didn't like my NLS so I invested in a sequential dogbox. Never looked back
You don't have to be gentle to the dogbox
@@hulk.agiota You must not be gentle with it. Be assertive
Since synchros connect the wheels to the gearbox and don't play a part in connecting the gearbox to the engine (that's what the clutch does), NLS won't have any affect on synchros; synchros operate before the clutch is reengaged, so whether you rev match or dump the clutch, the synchros are just chilling doing nothing while the torque flows through the clutch/gearbox/wheels.
It's shift speed (whether you NLS or shift normally) that correlates with syncho wear- and yeah banging gears too fast definitely does have a noticeable affect on synchros, from my experience :( lol.
@@CosineHyperbolic nope
@@CosineHyperbolic true, but the most important part is the speed difference between the input and the output shaft in the gearbox, those connected to the gears that you try to match. That's where synchro's come in. In a dog-ring box the gears are beefier, stronger and cut in a different way. Basically the gears always grind when the revs aren't matched but they are made to handle it. The slower you shift in a dog-ring, the longer the dogs grind and the quicker they will wear. Never baby a dog-ring.
Porsche's Can-Am 917/10 and 917/30 were among the first cars to use an intake bypass valve to keep turbocharger inlet revs up during a shift. I was at Lime Rock years ago and watched a 917/30 driving an exhibition at a vintage racing weekend. I knew when the bypass valves (twin turbochargers) opened because they made a sound like a rifle shot as the driver lifted going into the first turn.
You really bring a lot of clarity to explaining things
Good job! I've learned today ! Thanks :)
thanks for the detailed explanation. now I understand this concept.
Never knew some cars let you shift while pressing gas. Every time I see an engineering explained video, I learn something new!
I never knew you weren't supposed to!!
@@gamesterx2636 bro I know that you supposed to take out the gas pedal and then push the clutch in order to shift. But what I said was that “SOME cars” let you shift while pressing gas, like the CT4 V black wing he mentioned.
Back in around 2001 or so, with DSMLink we had no-lift-to-shift. I know this isn't factory or anything, but modified ECUs were doing it much earlier than than OEMs. Not quite sure why it took so long, to be honest, as the problem was so simple and so easily understood.
Great work, thanks a lot
Great video Jason! Very well explained as always. I just wonder though what your videos are gonna be like when there are no more ICE cars?
I tried this one time and my car was super pissed afterwards
Tried it in a car destined for the press. It wasn't pissed at all about it. Well, as Powerwolf once said in one of their songs, "Dead Boys don't cry"...
The whole point is the car needs to be tuned for this feature - so it can retard timing between shifts to decrease torque going to your clutch. If you do this on a car not designed for NLS, then your clutch will not be happy at all.
@@stephen3164 Oh, there's a way to do it without the clutch, so you completely ignore the powershifting clutch killing problem.
It involves waiting for revs to match, and renting a car if you're wise :P
Good to see you man
Terrific explanation!
Hi Jason! Looking forward to do this also in a NA engine with a standalone ecu. I understood also that this can be done for this type of engines, which thing should I consider most? Regards,
So amazing thanks my friend
You can also upshift (and downshift), without using the clutch. It won't increase your speed, but smooth out the shifting process.
If you want to destroy your synchronizers.
good job as always
Interesting that they went with the reverse of how a conventional wastegate works. The spring holding it closed with boost compressing the spring to open the wastegate. Also why go thru the trouble of a vacuum pump and resovoir when there's electronic wastegate actuators (less parts, less complex) what's the benefit of their vacuum system of boost control vs electronic wastegate control on other modern cars?
Just guessing but you might need a higher voltage battery for the motor
Great explanation! This seemed to be a lot simpler in older cars without the assistance....and other than the ones that broke parts, they all went faster. Even non-turbo cars...
Really interested and informative video.
Is there any benefit of NLS in an NA engine or does it only apply to forced induction engines?
I’m guessing not cause having that build up of air there wouldn’t really do anything since it’s not like it would be boosted or anything.
I'd love to see you do a video or two on aviation engines.
shifting on the mx-5!! Can we get some performance runs on your ND
When I was younger I had a 1967 Chevy ll nova, LT1 engine, borgwarner T10 trany, Hays 3 finger clutch. Never had a problem power shifting during a street race. Practice like anything else makes perfect.
Awesome you are the best teacher. Cheers
Did you hit the desired quota of saying "Cadillac CT5 V Blackwing?" XD
Sorry, couldn't resist. Great videos I'm a new fan but quickly going through your back catalog - keep it up!
I used to have a 93 Ford tempo with a 5-speed that would power shift very easy. Only I would stay on the gas and wait until the rpm’s matched up and shift without the clutch. Never gridded at all and the car seemed to love it. I’ve even done it in semi’s. Works every time up or down shift if you know your vehicle 👍
Please do a video that explains old 4x4 systems that require you to go in reverse after disenaging 4x4
I dunno what the first *car* was to come with powershift capabilities, but Case IH tractors have had it as an option since the 80’s! 18 forward and 2 (4 in later years) reverse gears, all accessible without ever using the clutch except to start or stop.
Love your videos
Love the Allbirds 🙌
Thanks for the education.
This is pretty cool. I didn't think they would really do this. And it already exists for so many years.
I've got many friends who will send you my way to learn how to power shift if you don't care about the eventual destruction. I loved the looks on the faces of people at the dragstrip thinking the car was an auto and when they came up to it in the pits they were shocked to see a stick in it. However, Ford's service writers had a very different expression. After the 5th trans they declared that I was paying for the next one. I guess my R&D contract ran its course?
i've gotten muscle memory down to half-throttle shifts in my car & truck. it seems a lot smoother in the car. the truck doesnt seem to care one way or the other, but the folks behind me sure do when I get moving about 2x as fast from a dead stop.
Back in the days of almost universally normally aspirated engines, I hooked up an ignition retarder to the clutch to allow this, first on racing karts (with mixed success), then on racing motorcycles. On the motorcycles, it always proved less effective than just doing clutchless changing, as the normal gearbox is constant-mesh rather than synchromesh. I believe that may have been the reason for mixed success on karts, too - some were constant-mesh motorcycle derived gearboxes and didn't respond well, while the others (with gearboxes of some other type, presumably) did. This was in the mid-'70s to early '80s. Just keeping the revs up meant a slight torque boost after the shift, as the clutch converted momentum of the higher revs into torque on re-engagement.
Jawa motorcycles had an automatic declutching mechanism on their gearshift pedals, which needed careful adjustment to work well, but was great when it did. Adding a microswitch to cut the ignition briefly on upshifts worked very well on a lot of motorcycles. In theory, a cam could be used to blip the throttle on downshifts instead of doing it manually, but I never got around to fabricating the parts to do that. I just practised my clutchless technique more! Less handy on those Jawas was the fact that the same pedal flipped over into a left-footed Kickstarter, which was utterly 'orrible as it drove through the gearbox so it was impossible to start in gear and was an ergonomic nightmare!
I clearly got my clutchless technique down pretty well, as I had a failed clutch cable on a Kawasaki Z650 in west London (near Heathrow) and rode through the London rush hour (before the M25 was built, and yes I know I'm ancient) to catch the only dealer (near Colchester and on the far side of London) who actually had one in stock. He had two, so I bought both and taped the spare next to the in-use one with a "boot" filled with grease over each end. The gearbox (in fact, the whole bike) was still fine at 126,000 miles when some revolting low-life relieved me of it.
Very informing, cool vid, but what about ways to powershift in a slightly older car without this technology? Any tips?
those are nice shoes bro. nice alcantara/suede/cloth material for sure
I know your diagram is a representative schematic but it got me thinking. Does placing the BPV closer to the throttle or closer to the turbo change anything in any measureable way? Just wondering if one might be preferable in terms of pressure waves, heat load on the intercooler etc. Thoughts?
My dad's 2008 Cobalt SS made a big time difference between power shifting and not since he had to take care of how much throttle was down with his boost up tune at 35PSI. He was able to get a 4.7 0-60
6:00 - is this a new way wastegates are being used? They open up at idle? Every waste gate I’ve worked on they remained closed till the spring was pushed open under pressure.
Thank you! I'm wondering the same. It must be a newer model thing.
Hey, it's VIR. I've had the privilege and it was a great time.
What are those brand of shoes!!! They look comfortable as well as that causal cross-trainer style. I want them!!!☺️🥴😂🤣
For someone that is familiar and more with this like engineering and racing, sadly i really want to know the brand of shoes he is wearing. Without a doubt though this material is one of the few but really the go to for the younger siblings with questions when I can’t be readily available to explain these things to them myself. 100% Trustable content and never bad for background play and learning about these newer inventions like the E motors and vehicles. Jason is the man!!! Keep it coming!! Thank you!
Very good content
So amazing thanks your share
I'm just wondering what your process is to prepare for these kinds of presentations, as you very much seem to not cut takes together. I feel like there's something to be learned for work/school presentations here. Sure, lots of experience after all, but I'm certain something popped up for you that you incorporate on the regular, no?
As always, you made me follow something with great interest that I will never apply myself, but can now look smart about at the lunch table. Great video.
Could you do a video on wether a enigne that runs at high rpm for less time will last longer the a engine that runs for a longer time at a lower rpm. Would be interesting to see which one would last longer and which engine will be healthier
diesel engines are made to be low RPM and they seem to run the longest
Footage of a boost gauge would have been great. The difference between flat foot and regular shifts is very easy to see in the gauge.
Footage... Nice one!
I used to hold the gas peddle of my 56 chevy 283 to the floor the whole race. I had a Hurst competition plus shifter and you could just slam it. I'm 71 and miss those days in the late 60's.
Hi Jason, you made a little mistake at 5:40
Wastegates always want to stay closed.
Stronger spring = more Boost
The Pressure in the exhaust is pushing while the vacuum is pulling it open.
There is the old trick where you drill a tine hole in the vacuum line to create more power.
Would you recommend doing this with a clutch delay valve?
O, I did not realise this was now a thing cars came equipped with... Still gonna keep doing it on my old cars in those rare occasions.
I need to figure out away to get this in my 2001 Volvo S60 2.4T with a BSR stage 1 tune, it takes its sweet time to spool up again.
Maybe i should just get the BSR down pipe to get it to spool up slightly faster.
Since you mention that there is a low amount of torque going to the clutch and instead used to make exhaust pressure to keep the turbos ready, would this type of shifting work for any N/A cars?
How does it deal with the required rpm drop for the next higher gear? Is the clutch still absorbing that speed difference?
The engine is in a low torque state when the timing is retarded, so the engagement is absorbed smoother/easier
i was waiting for him to explain that... but i guess modern manual trannys can absorb that or still needs to cut engine when sensor feels that u are in higher gear before letting clutch out, so can it still keep boost while cutting throttle ;D ?
Because ignition timing is delayed, you're at a lower torque state rather than a higher torque state. So the clutch absorbs the RPM difference, but since the torque is low (relative to a traditional powershift), it's easy for the clutch to do.
@@EngineeringExplained But that's what I said 😭
@@EngineeringExplained Why do you need ignition cut to flatshift in a standard manual at the rpm zone when torque is starting to drop? If engine redlines at 7k and you flatshift at 6k, in many car engines torque is now on the way down past 5252 and you have switched gear before the engine redlines. This isn't a standing start shift either, so when you re-engage, both clutch and flywheel are rotating masses. A slip is wear, but with sufficient clutch plate pressure, will you shorten your clutch life significantly, since the torque gradient will be transmitted through to the components either side of the non-slipping clutch. Yes, there will be a friction heat spike, but for a much shorter period. Flat shifting also allows the entire car's acceleration curve to be relatively unaffected. If the entire mass of the car changes acceleration gradient in a long shift, surely that wears the clutch more as the duration of slipping is increased and more frequent? I've not had a car with flat shift timing function and all seem to respond well to flatshifting without noticable clutch wear?
Ahh an EE video on transmissions -- a history lesson then - when cars had transmissions.. :)
I've been driving like this, especially down shifting since I first took my test in 1867 and I have not broken a a gear yet. I learned this practice from a London Metropolitan drivers manual dated 1935 or there abouts.
This lady has been driving motor vehicles since before they were invented.
@@RobbieFitzgerald Mr Laurie please
@@lauriepocock3066 Sorry.
I’d love to see a drag of the same car one using no lift shift and the other with normal shifts and see the gains.