Is this normal?
Thread Starter
Burning Brakes
Joined: Jan 2015
Posts: 789
Likes: 212
From: Katy Texas
Nice. I can see that happening coming out of a burnout. I'm just speaking of just normal cruising. 10-30mph down my street. This doesn't seem to happen on highway speeds.
Thread Starter
Burning Brakes
Joined: Jan 2015
Posts: 789
Likes: 212
From: Katy Texas
My Stingray did it as well as my Z06. pretty sure it isn't boost related though possibly worse on the Z06.
It comes from the way the torque delivery is programmed in the PCM.
There will always be a lag between requested torque, commanded torque and lastly delivered torque. This delay is probably only a couple of thousandths of a second maybe less but it is there.
I believe the surge we feel happens after you close the throttle completely (0 torque requested and 0 torque commanded) and when the PCM commands idle torque (around 5-7%).
If you are quick enough to get completely off the throttle and then barley back on it (roughly 8-10% throttle opening) you will notice the surge never comes in. Release completely and stay off of the accelerator and the surge is always there. (at least in the M7 Stingray and Z06 anyway.)
It comes from the way the torque delivery is programmed in the PCM.
There will always be a lag between requested torque, commanded torque and lastly delivered torque. This delay is probably only a couple of thousandths of a second maybe less but it is there.
I believe the surge we feel happens after you close the throttle completely (0 torque requested and 0 torque commanded) and when the PCM commands idle torque (around 5-7%).
If you are quick enough to get completely off the throttle and then barley back on it (roughly 8-10% throttle opening) you will notice the surge never comes in. Release completely and stay off of the accelerator and the surge is always there. (at least in the M7 Stingray and Z06 anyway.)
Instructor
Joined: Mar 2006
Posts: 246
Likes: 33
From: Mission Viejo, Ca
I have an A8.
Thread Starter
Burning Brakes
Joined: Jan 2015
Posts: 789
Likes: 212
From: Katy Texas
