I didn't know the C7 was a turbo
05-20-2023, 11:00 AM
#21
Tech Contributor
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Are you thinking the car is heavily loaded on the left rear [turning right and going steeply uphill] and the right rear with so much less weight on it is spinning faster? The active handling senses this and pulls timing/cuts power?
The left rear can't be spinning, it is carrying the bulk of the weight as you pass the apex.
The left rear can't be spinning, it is carrying the bulk of the weight as you pass the apex.
You may have been getting more PTM action as the day progressed and the track and tires got hotter. PTM limits the torque delivered to the rear wheels to the amount of grip available and you can hear the exhaust blatting (like a big truck using its Jake Brake) when it is active, when I am aggressively exiting either of those turns I can hear it blatting away on my Z06. PTM works in all of the track sub modes including Race. Like the OM states you want to hear that noise or you aren't getting all of the performance out of the car.
The system also dampens throttle on and off throttle movement in all of the sub-modes except Race. However, even though the throttle movement is dampened it doesn't prevent reaching wide open throttle it just means it is delayed reaching it so you don't overpower the rear wheels. I doubt this was causing your issue since except for Race Mode it is there all of the time to keep people from using the throttle as an ON/OFF Switch which can seriously upset a car and suddenly ruin a very nice day.
Bill
05-20-2023, 10:34 PM
#22
Burning Brakes
Thread Starter
Bill - if it is PTM limiting TQ, is there a way to drive T7 to get around it?
My C7 GS is almost 5/10ths slower in this sector than my C6 GS was and it has 30 more HP! It is red mist inducing painful to get back to power here and have it feel like I missed a shift or missed the gas pedal.
My C7 GS is almost 5/10ths slower in this sector than my C6 GS was and it has 30 more HP! It is red mist inducing painful to get back to power here and have it feel like I missed a shift or missed the gas pedal.
05-20-2023, 11:08 PM
#23
Bill - if it is PTM limiting TQ, is there a way to drive T7 to get around it?
My C7 GS is almost 5/10ths slower in this sector than my C6 GS was and it has 30 more HP! It is red mist inducing painful to get back to power here and have it feel like I missed a shift or missed the gas pedal.
My C7 GS is almost 5/10ths slower in this sector than my C6 GS was and it has 30 more HP! It is red mist inducing painful to get back to power here and have it feel like I missed a shift or missed the gas pedal.
05-21-2023, 04:16 PM
#24
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Location: Bonneville Salt Flats, 223mph Aug. '04
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You simply got the wrong transmission. 
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TKOGTO (05-22-2023)
05-22-2023, 11:01 AM
#25
Burning Brakes
Thread Starter
Yes I am sure. 2 clicks of the mode selector to get it to PTM modes. Turn the dial to Sport 1 or Sport 2 and either leave it or push the select button on the SW. Same way I've been doing it for years.
05-22-2023, 02:02 PM
#26
ok good. Show us the video if you recorded with pdr. Super simple to tell with video.
05-22-2023, 02:08 PM
#27
Burning Brakes
Thread Starter