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The 2020 Vette does not have start/stop technology (thankfully), however it does have cylinder deactivation (unfortunately). Does anyone know if the deactivation feature can be turned off either temporarily or permanently?
The 2020 Vette does not have start/stop technology (thankfully), however it does have cylinder deactivation (unfortunately). Does anyone know if the deactivation feature can be turned off either temporarily or permanently?
Thx.
May be more than you want BUT this is how you can control the DCT, which includes how to stop V4 mode:This summary of the C8 Transmission operation includes comments from GM’s DCT Controls Manager and a C8 form post by Tadge. Pretty impressive options.
· The C8 DCT transmission has different automatic shift strategies for the various drive modes, which adapt in real time. The more aggressive, the more spirited you drive, the more aggressive the car's responds, -start to relax, the car starts to relax.
· The DCT uses latitudinal and longitudinal accelerometers, and looks at information like throttle position and steering angle to gauge how the car is being driven, and react accordingly. In Track mode set to automatic, the car will downshift aggressively when the driver is braking hard into a corner, and hold upshifts until corner exit.
· The C8 has two manual modes. If you pull a paddle while in Drive, you get a temporary manual mode, which automatically times out, or can be exited sooner by holding the upshift paddle. In this mode, the car will automatically upshift at redline. If you press the M button in the center console, you get full manual mode. There's no time out, and the car won't upshift at redline.
· Hold the downshift paddle, the DCT will serve up the lowest possible gear. Do that while braking, and the transmission will keep downshifting as engine speed allows.
· Pulling both paddles at the same time is equivalent to pushing in the clutch pedal on a manual car, which allows you to rev the C8's new V-8 as much as you want.
· The paddles are directly wired to the transmission control module (TCM) for quicker response times. This doesn't mean the paddles will give you a downshift that over-revs the engine—the TCM prevents that.
· With the C8's Performance Launch mode, the car uses the inertia of the engine coming down between revs to propel the car forward.
· You can avoid V4 mode using the “M” manual button or temporally for 5 seconds after pulling the last shift paddle. The new "Z" mode comes from the factory set up as an extra sporty mode including shift schedules pulled from the "Track" mode, so that will be V8 only. You can customize "Z" mode any way you want, so if you elect another shift pattern, V4 mode will return.
it is turned off in certain modes which you can set using the Z button
Also, if you use the paddles and shift manually, it does not enable cylinder de-activation. This will work for me at first, as I will hardly drive the car in automatic mode anyway.
I, for one, despise the technology and plan on getting the Range device for my car as soon as it becomes available for the C8 generation of 'Vettes. On those rare times when I do want to drive it in auto, I won't have to worry about that damn feature coming on.
The 2020 Vette does not have start/stop technology (thankfully), however it does have cylinder deactivation (unfortunately). Does anyone know if the deactivation feature can be turned off either temporarily or permanently?
Thx.
May be more than you want BUT this is how you can control the DCT, which includes how to stop V4 mode:This summary of the C8 Transmission operation includes comments from GM’s DCT Controls Manager and a C8 form post by Tadge. Pretty impressive options.
· The C8 DCT transmission has different automatic shift strategies for the various drive modes, which adapt in real time. The more aggressive, the more spirited you drive, the more aggressive the car's responds, -start to relax, the car starts to relax.
· The DCT uses latitudinal and longitudinal accelerometers, and looks at information like throttle position and steering angle to gauge how the car is being driven, and react accordingly. In Track mode set to automatic, the car will downshift aggressively when the driver is braking hard into a corner, and hold upshifts until corner exit.
· The C8 has two manual modes. If you pull a paddle while in Drive, you get a temporary manual mode, which automatically times out, or can be exited sooner by holding the upshift paddle. In this mode, the car will automatically upshift at redline. If you press the M button in the center console, you get full manual mode. There's no time out, and the car won't upshift at redline.
· Hold the downshift paddle, the DCT will serve up the lowest possible gear. Do that while braking, and the transmission will keep downshifting as engine speed allows.
· Pulling both paddles at the same time is equivalent to pushing in the clutch pedal on a manual car, which allows you to rev the C8's new V-8 as much as you want.
· The paddles are directly wired to the transmission control module (TCM) for quicker response times. This doesn't mean the paddles will give you a downshift that over-revs the engine—the TCM prevents that.
· With the C8's Performance Launch mode, the car uses the inertia of the engine coming down between revs to propel the car forward.
· You can avoid V4 mode using the “M” manual button or temporally for 5 seconds after pulling the last shift paddle. The new "Z" mode comes from the factory set up as an extra sporty mode including shift schedules pulled from the "Track" mode, so that will be V8 only. You can customize "Z" mode any way you want, so if you elect another shift pattern, V4 mode will return.
Also, if you use the paddles and shift manually, it does not enable cylinder de-activation. This will work for me at first, as I will hardly drive the car in automatic mode anyway.
I, for one, despise the technology and plan on getting the Range device for my car as soon as it becomes available for the C8 generation of 'Vettes. On those rare times when I do want to drive it in auto, I won't have to worry about that damn feature coming on.
the problem with these software based deactivation devices is that while it will not activate, it does not prevent a failure of the deactivation system.
My opinion? Unless they can be flashed AND the associated hardware removed/changed out for aftermarket parts, keep it on and enjoy the extra 1mpg on the highway.
Also, if you use the paddles and shift manually, it does not enable cylinder de-activation. This will work for me at first, as I will hardly drive the car in automatic mode anyway.
I, for one, despise the technology and plan on getting the Range device for my car as soon as it becomes available for the C8 generation of 'Vettes. On those rare times when I do want to drive it in auto, I won't have to worry about that damn feature coming on.
What's wrong with cylinder deactivation when you're cruising?
What's wrong with cylinder deactivation when you're cruising?
Depends who you ask. Some people think it’s worse than demonic possession. Personally, I could care less. It occasionally kicks in on my C7 when I’m on the highway. The split second I give it the gas, presto changeo, back to 8 cylinders. Not really seeing what the problem is.
What's wrong with cylinder deactivation when you're cruising?
I've seen so many videos on the torque converter issues that plagued the C7 because of the cylinder de-activation feature. I just don't ever want to worry about it.
A tune gets rid of it completely, but you risk voiding your warranty.
Also, if you use the paddles and shift manually, it does not enable cylinder de-activation. This will work for me at first, as I will hardly drive the car in automatic mode anyway.
I, for one, despise the technology and plan on getting the Range device for my car as soon as it becomes available for the C8 generation of 'Vettes. On those rare times when I do want to drive it in auto, I won't have to worry about that damn feature coming on.
I just purchased one of these things for our new Cadillac XT6. I have the one to bypass the engine "START/STOP". They are pricey ($199 with tax) but they work like a charm. Just plug it into the OBDII port and forget.
^^
As Zymurgy said in post #8, not so easy! These are NOT universal devices, they must interact with the computer coding. May NOT be one for the C8 LT2 or DCT.
Drive in Manual mode or Program your “Z” Mode properly an no need for “Bletchley Code Breakers!”
I've seen so many videos on the torque converter issues that plagued the C7 because of the cylinder de-activation feature. I just don't ever want to worry about it.
A tune gets rid of it completely, but you risk voiding your warranty.
There's zero evidence the torque converter issues had anything to do with AFM. And there's no TC on a C8.
And with the encrypted Global B electrical system, tuning is going to be difficult, if possible at all (without GM's approval).
Last edited by Red Mist Rulz; 02-18-2020 at 02:17 PM.
Is Range Technology going to be able to use the encrypted Global B bus in the C8 to override AFM? I have my doubts.
No way to know until they can get their hands on a C8 to try to reverse engineer, but I agree with you, it's going to be challenging, if it's even possible.
My last Porsche had a DCT, and I never drove it in automatic. I always used the paddles, so i need not worry about ever being in 4 cylinders when i get my C8.
Having driven several cars with start/stop, and currently owning one with cylinder deactivation, I don't understand what all the fuss is about. Yes, it is a little weird at first to be stopped at a light, and have no vibration or sound.
02-18-2020, 11:52 AM
Start/Stop & cylinder deactivation
