Did GM just RUIN the C8 ZR1 with this DISASTROUS FEATURE!?
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- Опубліковано 12 бер 2024
- Did GM just RUIN the C8 ZR1 with this DISASTROUS FEATURE!?
Ladies and gentlemen, today I will discuss GM potentially making a huge mistake adding active fuel management to the new 2025 C8 ZR1 Corvette.
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#c8zr1 #brinkofspeed #c8corvette - Авто та транспорт
Let me know your thoughts below.
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1. To meet government demands
2. To ensure people in the AFM department have a job
3. To give the AFM acronym another name. “Another fried motor”
4. To give you a reason to say “grind my gears”
5. To give Robert at CW heartburn.
So far this comment is winning! 😂👍
Lolololol. Agreed!!!!@@BrinkofSpeed
The only reason they are doing it is to avoid the carbon tax. You can tune around it,or drive in manual mode.
Which is a garbage reason for doing it.
@@BrinkofSpeed Idk, I mean, isn't the reason GM exists to make money? They could, not do it, pay the taxes, and raise the price of the corvette to cover it. Then, everyone would be complaining about the Corvette costing too much. I am definitely no democrat, or communist, or socialist. I absolutely do not support those ridiculous regulations and government overreach. However, those laws have passed and GM has only two choices; pass the emission test, or pay the taxes and fines and pass the costs onto the customer. Seems like the board decided to pass the emissions tests and keep the price lower.
Lol price lower. Starts at 125k. You won’t see any under 150k not including mark up
@mattsomeonewithansrt3948 for the C8 Z06 and ZR1 yes but not the stingray. Also the C7 models are a bit cheaper. I mean what do you expect from a border line super car?
@@LeviHeatonIII so instead they are paying even more money for parts and engineering to even make the AFM feature exist
Worst idea ever, the C7s really could’ve been a lot better without it. It takes out lifters like crazy. Barely makes a difference with mpg and no one buys a frickin Corvette to brag about MPGs🤡
I agree with you 100%
Me too!
I got 40mpg in my C7 on a trip to OH. It was a 7sp. I used eco mode on a normal bases and never had an issue. Had just under 35k on it when I sold it.
How many? Within a 1000, how many?
I won’t buy any car with AFM. It doesn’t matter who the manufacturer is. Other manufacturers have also had issues with AFM equipped engines. Here in Finland, if I could afford a new Corvette, which is double the cost of the same car in the USA, due to heavy import charges, and no dealers here, AFM would be a definite non starter.
When you starting modifying the car the very first thing most tuners do will tune out cylinder deactivation and when you do a cam they remove the mechanical stuff for it as well
This idea would be a horrible mistake! I currently have a C8 Z06 - Z07 Convertible, I asked dealer to keep me posted regarding the ZR1 arrival. I would definitely NOT purchase this vehicle with AFM … or ANY power restriction options.
So true I know what I said above but like you said who buys a corvette for fuel economy its all about V-8 power.
@@gregcoley7252yes sir agree 100% What’s next the auto shutdown when idling at a stoplight?
There is absolution zero reason to have AFM on any vehicle. This is hard on the motor, and it literally does nothing for fuel economy. The worst gimmick ever developed.
Don't count on the ZR1 revving high like the Z06 does. Remember, the LT7 a 5.5L but it's not a flat plane crank 5.5L in the ZR1. Now, why would they include it? Because it does actually help with fuel economy. That's straight from a GM Powertrain Engineer that I trust. It's not big, but it does help and that's why GM and others use it.
Be sure and remind your trusted GM Powertrain Engineer how much of a dumbass GM is that anyone working on an 800hp+ twin-turbocharged motor gives a hoot about +1.5 mpg tops.
I couldnt think of five reasons to have that system on my car but I offer five alternatives in exchange for one of your fancy shirts.
1) Don’t even start it without a factory warranty or after market warranty in force.
2) Don’t keep it beyond the warranties.
3) Don’t worry about it - it’s only money
4) If it worries you, have the system disengaged by LMR or someone with their knowledge
5) If it eventually blows up on your dime, buy something else with all the fuel savings you accrued. Lol
Thnx
Dr Jim
2020 Rapid blue Z51 coupe 3LT front lift loaded with an embarrassing amount of factory options and way too much carbon fiber
No one knows anything about the zr1. They didn't do it on the z06 because of the flat plan crank firing order and loss of tourqe. So if the zr1 is twin turbo lt6 I don't think you will see it happen especially with low production numbers.
AFM is annoying. The person(s) at GM who are responsible for its continuation probably drive another brand of vehicle.
Number one fuel mileage
Number two emission control
Number three much improve design
Number four, needed for the increase horsepower offset
Number five ability to turn it on and off in different modes.
To be clear, I am not a fan at all. I just want the T-shirt. ✌🏼
I like these reasons. I’ll keep you posted
lol. That part.
Smashed
1.) Improved fuel efficiency: Active fuel management allows the engine to run on fewer cylinders during periods of low demand, such as highway cruising or light load conditions. This can result in improved fuel efficiency, which is particularly desirable in a high-performance vehicle that might otherwise have poor fuel economy.
2.) Reduced emissions: By operating on fewer cylinders, active fuel management can reduce the overall fuel consumption and, consequently, the emissions produced by the vehicle. This can help the modified C8 Corvette ZR1 meet emission regulations while still delivering impressive performance.
3.) Enhanced engine longevity: Running on fewer cylinders can reduce the overall stress on the engine components, potentially extending the engine's lifespan. This can be particularly beneficial in a modified and turbocharged engine, which may experience higher levels of stress compared to a stock configuration.
4.) Improved driveability: Active fuel management can help smooth out the power delivery in a turbocharged engine by reducing the potential for turbo lag or abrupt power delivery. This can result in a more refined and enjoyable driving experience, even in a high-performance vehicle.
5.)Increased torque potential: In some cases, active fuel management can be used in conjunction with advanced engine management systems to provide a temporary boost in torque by reactivating the deactivated cylinders. This can be advantageous for short bursts of acceleration or overtaking maneuvers.
There is only one reason and that is the overall CAFE / EPA standards for GM. There is a very complicated formula they use for all the vehicles produced to stay under the limit. The ZR1 had to have pushed them over. It’s a double edge sword but if it extends the life of GM manufacturing ICE vehicles then they have to do it. Full disclaimer I think it sucks and we should not be forced to work around a AFM system on a performance vehicle!! Keep up the great content!!
Hey Mike, how about 5 good reasons why GM SHOULDN'T add Active Fuel Management? 🤣🤣 FWIW, I actually had the equivalent of AFM in my 1981 Seville which had what was known as having the 8-6-4 engine. And I had one that worked. Of course it didn't have all the technology that today's cars have. Having said that, maybe GM should go back to the way things used to be. Save the Wave 🙋♂
lol, 😂 good one Peter! I think that wouldn’t be a challenge at all, but 5 good reasons why they should use AFM is IMO, a difficult challenge. Yeah, it’s been around for a long time, and it still sucks and shouldn’t be in any cars, let along GM’s supercar! 😊
Agreed. And one doesn't, or didn't buy a Cadillac for its gas mileage. Especially in the land yacht that I had that tipped the scales around 4k pounds.
Did the same thing on my Yukon. GM doesn’t care and I think they love to screw their customers.
Not in my vette yet, both my neighbor and I lost a cylinder in our 2022 trucks. Both dropped a valve. Mechanics flat out said it was that AFM
Haven’t had the issue with my 2022 C8. 🤞🏻 Seems to switch seamlessly from V4 to V8 in tour and sport mode. No noise or any other indication that it is happening. I’m probably in those modes 90% of the time.
no issues YET
Nor should you have any problem 'through warranty'.
The problem with v4 is it drains the oil and cools down the cylinders and added moving parts that can’t handle the stress
Years ago when news of the C8 was hitting showrooms, I looked into the C7s. I figured I'd be able to get a deal on one, with everyone lining up for a C8. My research revealed the AFM feature .. and caused me to *immediately* disregard buying a C7. Late 2023 I was in the market for a daily driver. I saw a gently used Mazda 6 near me. Again - did my research. *Even those* - an in-line 4-cylinder, had AFM and turned into a 2-cylinder, effectively. Again, *immediately* disregarded that purchase as well.
What did you purchase?
@@Sir.ExtraterrestMicro blue 2018 Kia Stinger GT2, with 49K miles. Very happy so far!
In the C7 manuals, it only engages in Eco mode at highway speed. I’ll never put it in Eco so I’m at ease.
Active Fuel Management is a deal breaker for me and seems crazy on any Vette especially given the history.
You can thank California for starting the trend to destroy the car hobby.
The AFM on the C7’s can be overridden by a chip that plugs in…I think in the data port…easiest fix. I have a C7 Z06 that I modified with a Procharger supercharger, an just deleted the feature in the programming. Most importantly, shut that AFM off, according to the high performance tuner/engine builder!
Not to be too technical but these are the 5 reasons. 🙂
1- Enhanced Fuel Efficiency: Active fuel management optimizes fuel consumption by deactivating cylinders when they are not needed, resulting in improved mileage and reduced fuel costs.
2- Increased Engine Longevity: By reducing the workload on the engine during light-load conditions, active fuel management can decrease wear and tear, leading to prolonged engine lifespan and reduced maintenance expenses.
3- Enhanced Performance: Active fuel management systems allow for seamless transitions between cylinder activation modes, ensuring smooth power delivery and improved driving experience without compromising performance.
4- Environmental Benefits: With improved fuel efficiency comes reduced carbon emissions, contributing to a cleaner environment and lower ecological footprint.
5- Cost Savings: Utilizing active fuel management can lead to significant savings over time, both in terms of fuel expenses and potential maintenance costs, making it a cost-effective choice for vehicle owners in the long run.
should not be in any sports car over 400HP. In my opinion.
I have been using the range AFM module delete on my C7 Z06 when I first found out about this problem. I don't think that the ZR1 will be a flat plane crank that is turbo charge if they are going to use AFM. The reliability of a turbo flat plane crank would be detrimental let alone adding an AFM. Therefore I believe it would be a turbo cross plane crank allowing turbo and AFM. If AFM was an issue with the torque converter engines only, than the C8 has none which could be the consideration of adding AFM. I guess GM need more CAFE ratings on their Corvettes and risking cost reliability of their engines with AFM and putting the cost burden on the consumer after warranty. It's a matter what is cheaper to do for business for GM. Car company have been doing this for years. But that is just my opinion.
Pushrod vs DOHC. The system won't be even remotely the same. Wait until you see the type of system before making a judgement, That being said, is it needed? No. Do I trust GM to have all the bugs worked out before production? No.
5 reasons
First off, let me just start by saying that I don’t like the AFM system anymore than anybody else and I’m not defending it in any which way shape or form. However, here are 5+ reasons that GM would argue are good as to why they would put this in their car.
1. It does improve gas mileage, however minimal it may be, but under certain conditions and under certain driving applications, it can improve gas mileage to overall increase the cars gas mileage to better meet EPA standards and requirements. Remember, they have to meet standards as an entire company and the Corvette is part of their company. When you are a big corporation, this is a major factor to comply with government standards.
2. It can avoid the gas guzzler tax. By installing the system, you can possibly avoid the gas guzzler tax. Yes, general motors could just pass the cost of the tax along into the price of the car. But I think we all know by now a lot of Corvette owners (not all) but a lot are and can be somewhat cheap. And if they don’t have to pay for something then they won’t.
3. By keeping the cost of the car lower without the gas guzzler tax, this leaves, the consumer more options to add onto the car and what would have been otherwise "wasted" money on a gas guzzler or tax. By not having to pay for a gas guzzler tax now they have an extra money to spend on other options, which will make the consumer more happy.
4. You would be surprised how many Corvette owners are not true enthusiasts, or even know the intricacies of the system. All they hear is that it’s a system that can improve their gas mileage, and they are on board for it. And that's good marketing in their eyes.
5. To satisfy certain criteria with the companies emissions standards, and gas mileage standards in general, they probably added this feature onto the ZR1 in order to help boost overall Corvette mileage. On the E-Ray perhaps GM was hoping that a byproduct of adding an electric motor would help boost gas mileage. But it did not. They had to make up the difference somehow and then put this into the ZR1.
Bonus
6. i’m willing to bet that there are engineers that truly believe in the system and think that it can work. The early AFM systems had problems but all systems do once they are new. Perhaps the revised engineering has cured all those problems as the systems are definitely different from the earlier ones. I'm sure General Motors will also exhaust all options before scrapping this type of thing considering the amount of money I’m sure they’ve invested into it already.
7. This is also a huge indicator that the LT7 in the ZR1 will be cross plane crank, and not a flat plane crank. AFM is much much easier to deal with on a cross plane crank engine. Flat plane crank engines already have balancing issues with primary and secondary balancing and then when you try to incorporate cylinder deactivation into it, it would just make it overly complicated. Not to mention that it is also much more involved to put AFM on DOHC engines versus OHV engines. Trying to add this to the Z06, which has a DOHC as well as a flat plane crank would have been more trouble than it was worth. Granted the ZR1 will more than likely be a DOHC engine as well, it is easier to apply to this with a Cross plane crank than a flat plane crank.
8. The Z06 is well known for getting very terrible gas mileage. I’m sure this brought down the overall stats for general motors as well as for the Corvette. They had to find a way to recuperate those stats and bring the average back up in thus incorporated, active fuel management into the ZR1.
Hope you enjoyed this, if nothing but for a good laugh.
I have a 2017 C7 Chevy Corvette Stingray Z51 with a 7 speed manual transmission, LT1 6.2L V8 that has cylinder deactivation. I get 35 mpg on the highway & I have never had a problem with it.
You get the same mpg in V8 mode. I always turned off the AFM system in my C7 stingray. At highway speeds I would get 35 mpg.
I guess you could buy and use the Range device to disable the active fuel management in your ZR-1...
I have one for my C7 and it works great. No going in and out of V8 to V4. Same crappy lifters still in the engine, but I feel a tiny bit better.
I used a plug and play jumper to disable the auto stop/start feature on two of my GM vehicles. I couldn’t imagine the auto shut off of four cylinders on my C5 Corvette.
Yeah, they can't execute it right. It causes so many other issues and just not worth it at this time. Scotty never liked it either.
I have a 2015 GMC Sierra with AFM. I bought a Diablo tuner which has a toggle switch which turns off in AFM mode. FB has many groups which talk about how this AFM ruined their engines. $4,000 repair job. AFM lifters (4) which shutdown in AFM mode, get stuck in the down position. Some folks buy a Range product which plugs into your OBD port, which disables the AFM. Diablo tuners turn it off. 100k on my truck, no lifter problem. Fingers crossed.
Government mandated fuel economy ratings is to blame 😮
How do we even know it’s confirmed?
My C8 z06 has a $3000. Gas Guzzler Tax , maybe they trying to cut that Tax amount and especially because that Tax is listed in “OPTIONS” lol That is the ONLY Option I did NOT want. 😆
I use the range device on my 2018 C7
Me too, works great in my ‘16 C7 with the A8 transmission.
Totally agree with all of your comments
From my point, how complicated does an engine need to be. And for such a small volume that will be actually produced.
Another reason why I continue to say the LS-9 is the best performance motor GM has ever built
Enjoy your comments and I look forward to your next video 👍🏼
It probably has something to do with the government because of a gas guzzler tax. Who knows, maybe it drinks so much fuel that they had to do this. Does anybody know if the gas tank is the same size on a ZR1 as it is on the Z06, and if it is, being turbocharged probably going through a shit ton of fuel with normal driving that would be the only reason why they would do that but every vehicle they have done it on from 2012 Suburbans to now it's destroyed every motor in a bad feature I hate it
Had 2 c8’s the 2nd c8 2020 in Virginia and a 2022 c8. Both with AFM both with 0 issues. You’re making a mountain out of a mole hill. It saves gas when cruising on the highway at 70 for hours. There is 0 sound changing from one to another and the moment you hit the gas it goes to v8 so no you don’t lose power
GM is playing along with the carbon credit game and selling more parts, it’s a win for them.
The new ones have dynamic fuel management, which allow it to run on only one cylinder on the highway. Oh my God a time bomb.
That sounds absolutely terrible
There is no reason, let alone 5 Mike! I just took delivery of a 2024 C8 ZO6 in which i traded a 21 c8 stingray that had fuel management and I am soooooo Thankful the ZO6 doesnt have it. The only advantage i can possibly think of is to save 3k and eliminate gas tax. I am not concerned about fuel mileage with this beast!
Its proven that GM engines with AFM, given the same engine architecture fail at a higher rate than non--AFM engines. Given. But then, begs the question, why would Chevrolet release such a design other than CAFE that can be achieved through alternative design options? Many will wonder this question in earnest. Why GM? A comment below said plainly, GM doesn't care about their customer. My response having worked for Chevy Engineering is, oh GM cares. They want your money.
The consumer, and this goes over the head of too many consumers that purchase automobiles, should be paying attention to 'when' automobile component failures occur. Are these failures infant mortality aka under warranty? Very rarely. First, if this occurred with regularity, it would bankrupt companies. Then why? As it turns out, automotive engineers that develop all cars and the Corvette know with some statistical certainty when a given system will fail. How do they know? Because over the decades they have developed both destructive and non-destructive product verification tests and computer models that identity when parts will fail out in the field. This is done in the laboratory and on the test track correlating abuse to failure in terms of mileage.
In the case of AFM, GM engines have historically failed 'outside of customer warranty'. That makes it on the customer's dime and not GM's. In fact, many don't consider that GM actually profits by selling parts 'twice' ...once originally with the car and again when failures occur outside warranty. Extrapolating further, this is the essence of 'all new car complexity' including hybrids and the new Eray which has 2.5 x's the part complexity of a standard Stingray.
Why have cars become a lot more complex in the last 15 years? BMW, about 20 years ago taught the industry this business model with overengineered cars for profit and now the entire industry is on board including Honda and Toyota who is experiencing part failures way above previous decades. More parts with same level of engineering = more failures. For those that don't believe in planned obsolescence for profit, think again. Statistics 101, a class that all engineers take in college as part of their core math requirement. Engineers know and their design direction is given by their management.
AFM counterproductive to longevity? Of course. Engine fails at 100K miles? What are you going to do? You aren't going to scrap the car. You are going to buy your second engine and send a nice check to GM.
In summary, GM exists for profit. That's why and btw, any other reasons don't matter.
Glad I watched. Now I know the first thing I should do when I start my car is press the Z on the steering wheel and max out all settings.
There are no good reasons, let alone five!
Just sharing some information. My 2022 GMC AT4 6.2, didn’t come with AFM. Don’t know why, perhaps chip, or parts shortage. I hope it doesn’t have those lifters installed.
No, it does not make sense. I hope they don't put it.
AFM never triggers on the M7 C7 cars unless you specifically put the car in eco mode. I can save more gas removing the aero parts on my C7 Z06 where even put in eco mode, the M7 rarely went into V4 mode making barely a 1mpg difference.
I despise this feature in my 2021 C8. It's just absurd that they would put AFM it in the ZR1!
That is selective on my 2018 C7 Z06 on the mode selector. Now I have a manual transmission maybe that is why I don’t know for sure. That being said my C7 ZR1 did not have that BS and these are performance cars no buddy wants that why would they do that?
Agreed! 👍
Great information! They shouldn't. Especially if it is little savings. Sounds like it would cost GM more money
Yeah, it’s a bunch of nonsense for sure. I hope they decide not to do this!
All you have to do is drive it in (Sport or Track Mode), same with the ERay.
An engineer at the bash told me that when I asked if the eray had AFM. I’ve never driven my Stingray in anything but sport and track and because of that AFM has never activated..
**Maybe track power train is the key.
AFM may still activate in sport.
FYI: My Stingray is a 2020 Model
I have a 2023 Stingray and only drive it in Sport mode or My Mode. AFM is active.
@@leudop hmm 🤔 I use Z mode and set everything to track with one exception, I keep the suspension in Tour.
Maybe the track powertrain is key
I don’t think it can be done because the way the cylinder heads is on the overhead motor if they did it would be completely different type of system than what was your C7 Z06 .
Government regulations…!!!no more need to to be said ..!!! Now they knew that …so they were tryna pass the code ..
CAFE desperately needs to be 100% abolished. For those who are unfamiliar, it's Corporate Average Fuel Economy. This is the root cause of of almost every problem in the auto industry. It hampers safety (cars need to be lighter and lighter to meet new goals), it hampers emissions (you can't engineer components as well with the weight/mileage penalties), it hurts power potential (every car maker is designing everything for advantages with the formula for EPA "ESTIMATED" MPG), and in a huge way, it destroys reliability (every component is being made lighter and lighter, junk).
If car makers were able to engineer every vehicle properly without having to worry about paying penalties and buying carbon credits from other companies, they could make everything more reliable, safer, cleaner, and all of this while performing better. Please tell me if you think this is wrong!
The only thing GM is trying to "appease" with AFM is their bottom line, which is hurt by the punishments received for violating America's CAFE requirements. Frankly they should just build a couple hybrids or offer electrified versions of a couple of their gas cars instead of purposely building engines to break.
Making a deal with Kia to build shitty cheap rebranded electric cars is better than AFM. But ancient suits are hard to convince using modern reason.
Hybrids are worse for reliability compared to AFM ICE only. You can take that to the bank.
Lame. I remember during the debut of the c8 GM stated that they weren’t going to go with afm. Now they want to put it in the c8 zr1? This is the worst idea, c7 has a lot of problems because of afm. I’m so glad I have the last real vette, a c6.
I only drive my C7 Z06 in manual mode
It's really the amount of gas you save is so remote and it just doesn't make sense
Idk if any good reasons but have some ideas.
1 avoid carbon tax
2 more service department businesses lol
3 overhead cams work better with AFM.
4 Better to have a V8 than none at all if thats what it takes to keep government happy.
5 idk
I cant come up with anything else lol!!
That being said iv had 3 5.3’s with AFM only one had lifter fail my 2015 Silverado. Its the only one i bought used so idk if previous owner didn’t take care of it who knows idk.
Wife drives 2018 camaro 3.6 RS over 60,000 on it now no trouble with AFM maybe overhead cams work better with AFM idk.
My father has had at least 10 Silverados now with AFM and his 2015 vet. No problems with any of them but he doesn’t drive hard. I drive very hard i dont feel any hesitation maybe once in a while idling around feel a little hesitation with wifes camaro. I know there is issues with AFM but i haven’t really experienced much besides my 15 Silverado. My father and i get incredibly good highway mileage with our Silverados 4x4 crew cabs 24-26mpg. I believe if u do drive for mileage there is advantage with AFM when it comes to fuel mileage. Wifes camaro iv seen 36mpg but usually around 34 highway and average 25 mpg. Dont go over 60 and easy on throttle u will see a increase in Fuel Economy with AFM.
For some reason i don’t believe ZR1 will have AFM but if it does with overhead cams i don’t think its going to be as bad as a pushrod engine. If i could buy one i would still more reliable than exotics costing 3-5 times as much so its not a deal breaker for me. Id just tune it out get rid of it probably.
My guess is the new ZR1 engine wouldn't meet minimum mileage requirements without AFM.
AFM and AutoStop could be features to comply with US government mandates around total annual production MPG, ESG, sustainability, net zero etc.
I recently received my 2024 C8 Stingray and have about 600 miles on it. Anyone know the percentage of C8 Stingrays that have had this issue? I was not aware of the problem when I ordered.
It isn’t on naturally aspirated engines on the C8 or c8 z06. The video was saying it’s rumors that they’re bringing it back for the zr1 to save government type gas mileage/emissions. You’re Gucci.
My C7Z had AFM lifters and it really annoyed me since who the hell cares about fuel mileage on a supercharged 650hp V8 motor in a Corvette? LS/LT motors should have come with Johnson 2110 lifters from the factory for the price GM charges. Same logic with AFM applies on the C8 ZR1, even though the lifters are vastly different than the LS/LT lifters. Sure, you can tune out the AFM or disable it, but the AFM lifters remain in the motor unless you replace them. There is a big spring on the top of an AFM lifter and it's just a needless waste of extra parts on a performance application that does nothing for performance. Defies logic. I'm not happy that I have AFM on my C8 Z51 but it's a lot more labor intensive to remove the motor and get to the heads on a C8 than it was on the C6 and C7. I'd stay away from any of these LT6 or LT7 motors with DOHC's that had AFM lifters; they have to be incredibly delicate and a weak point for the motor. Reminds me that I need to stop spending my money on GM products.
The best part of the C8 was getting rid of the torque tube which plagued C5-C7 Corvettes. AFM compounded the torque tube issue along with heat from the dual exhaust running right next to the torque tube. On the C8, AFM will not be as big an issue as the lifters were redesigned for more robust performance. AFM should never be installed on the ZR1.
Myself personally, I would just get the basic LT one engine low horsepower. just drive it like a Lincoln town car.😂
The give away Z06 appears to be painted like an Eray
I definitely has body color painted panels
Reason 1: McLaren 765 does it, Ferrari does it.
Reason 2: The high end torque and hp will be monstrous.
Reason 3: pop off valves sound awesome if done right. See McLaren.
Reason 4: Top end speed will be ludicrous.
Reason 5: Twin turbos prevent the majority of turbo lag.
Don't need a shirt but there you go. I love the idea of twin turbos if you can't tell lol.😂
I don’t think you know what afm is
Well you think they would test the system rigorously before production.
That R&Ds job. Unless they had time restraints. The New AfM may be a new Revison that fixed the issue you would hope.
Who is trying to save fuel in a corvette or a pickup truck
Question: Does driving in Z mode with your Stingray prevent the LT2 from going to V4? I had heard it somewhere in passing and I wasn't sure that was accurate. Thx!
There aren't 5 reasons for AFM. The reason is CAFE regulations. They don't have a choice. It's AFM, a V6, or pay more fines.
Get a AFM DISABLER. QUICK!!!
I'm sure this is to meet government standards / gas guzzler taxes in various states
1.Improved gas mileage,
2.reduction in pollution,
3.use of e85 fuel,
4.easy to add with minimum additional engineering
5.score points with the environmentalists
They did because they had to in order to meet mileage parameters required by law. I know, it sucks.
Many do not enjoy to its fullest, so they do not delete the option, I deleted it when I had my C7 Z06 tuned, and many modern day people think mpg, government pushes an option like this, some people buy it for looks, and make others jealous with what they have, most corvette owners I pull beside in a clear area will not play, my friend experiences same issue with his built 500hp STI, so many vette owners want 4 cylinder mpg, with corvette look,
For a year worth of production, the MPG increase, however slight for the individual automobile, adds up significantly when GM calculates their café, or corporate average fuel economy number, and they do it solely for that reason. Buyer be damned!
I would NOT buy the ZR1 if they put in AFM period! I'd rather get the Z06.
When I think of buying a fuel sipping vehicle, I want it to be a Corvette.😊
This is REALLY great info to know.. I had no idea it was tearing up the LT4 and LT2's bc of this AFMS... I will now drive mine in manual mode also... even though in my c8 I barely ever saw it kick into 4 cylinder mode at all... guess I drive with too much of a heavy foot. ;)
It’s all about EPA CAFE fuel economy.
EPA tests shows a 5.5-7.5% improvement in fuel economy.
Its fairly simple actually..They probably have to use it for emissions requirements to keep the fed off their backs..its a feature that can most likely be turned off.
Like the red bull could be ignited in the exhaust to accelerate it and increase down force like the Red Bull (RB7 I believe) and was quite effective
Though a terrible idea to put AFM on this engine, in theory it shouldn’t be as bad as it is on the cross-plane crank V8. Instead of V4 configuration which takes the engine out of balance thus creating the known issues, a flat-plane crank should (in theory) run off just one bank of cylinders making effectively an inline 4 and it wouldn’t be any more/less unbalanced than when it’s running on all 8 cylinders. So…it shouldn’t sound “broken” like the others and the exhaust note shouldn’t sound like the engine is misfiring.
You can get it tuned out.
I just never keep my C7 Z06 in a drive mode that would allow it to go into V4 mode. And, as a manual, I'm shifting all the time anyway. Hopefully this doesn't make it into production for the ZR1.
What's up from Brazil my bro.
What i think is that GM made a camarete (Corvette Fusioned with Camaro), is not the true Corvette that everyone love...
I don’t think GM is gonna de the colossal stupidity of putting twin turbos on the ZR1, I’ll be sooooo disappointed if they make such of underpowered monstrosity mistake of putting antiquated technology on a state of the art supercar instead of installing a supercharger or pro-charger that can boost 500+hp to the LT7 and not to mention the extreme heat and the extra weight of the air-to-air coolers needed, i hope it’s just a bad joke
Because they like warranty claims
I’m not a fan of cylinder deactivation but buying a C8 and having to drive it in manual mode is absurd, it’s a damn car so drive it and stop losing sleep and worrying about a vehicle or sell it and get something else.
There will be so few ZR1's built, this AFM trash would be such a small impact in the grand scheme of all C8's anyhow. Also, in addition to driving the Stingray in manual mode, it will also defeat V4 AFM if you run it in track mode.
If you think the current AFM is bad, you should have been around in the '80s when GM turned the SBC 350 into a diesel engine. And as previously mentioned in this comment section, Cadillac had a mechanical 8-6-4 version of AFM. Anytime you would go in a service department, there'd be at least one Cadillac with the heads off.
I heard they would NOT be using the Z06 motor for the ZR1 - it would be a boosted version of the 6.2L LT2 or a completely different motor. I did hear it would NOT be flat plane crank in the ZR1.
AFM.... you need for fuel economy on highway and don't need full power. Not dragging your ride daily.... If you had a manual no need!
did the manual version of the C7 z06 have AFM?
Wait. How do you deactivate a valve that doesn't have a lifter? The LT6 has shim based non-adjustable (set for life) valve lash on the cam followers. GM brags about this set up and it's one of the reasons every LT6 is run-in at the factory after assembly. If the ZR1 has AFM, then its engine is based on the LT2.
I've been a Corvette fan for life but GM is notorious for building crap and ruining a lot of vehicles.
Cylinder deactivation will be o k for those who want like you said a lil bit better fuel economy and the user does alot of hwy driving might I suggest you talk to cadillac motors since they were the first to offer this feature
Mary Bara needed something to do besides destroying GM
You realize it's overhead cam engine there are no lifters to collapse.