[ANSWERED] How do the Various PTM Modes Change Parameters When in Track Mode
08-25-2015, 10:50 AM
#21
Drifting
08-27-2015, 06:43 PM
#22
Burning Brakes
07-06-2016, 10:14 AM
#26
Race Director
Member Since: Aug 1999
Location: Bluffton SC via Canton Oh
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This is amazing information.........very well written. Technical stuff in laymans terms.
07-31-2016, 10:40 PM
#27
Melting Slicks
So what happens if you turn off Traction Control and Active Handling ?
I notice when you use Sport2 or Race mode within Track setting,
the TC and AH lights both come on to indicate they are disabled.
So I put mine into Track mode, then turn off TC and AH.
And I have a terrible time trying to accelerate out of corners.
The rear end just steps out and comes around... quickly... with no
opportunity to counter-steer.
If I try to use Track/Race, there is a huge amount of interference to the engine power.
My times are actually better when I turn all the nannies off.
This is for Autocross... I cannot do Track days, since mine is a convertible.
But we autocross a LOT.... 29 events this year alone.
For a good nice warm day, using R888 tires, and on a course designed for Miatas,
(lots of turns), what would be recommended settings ?
I've spent more than a year, and spent lots of $$$ on sway bars, and alignment,
and wider wheels/tires, trying to solve this issue.
I notice when you use Sport2 or Race mode within Track setting,
the TC and AH lights both come on to indicate they are disabled.
So I put mine into Track mode, then turn off TC and AH.
And I have a terrible time trying to accelerate out of corners.
The rear end just steps out and comes around... quickly... with no
opportunity to counter-steer.
If I try to use Track/Race, there is a huge amount of interference to the engine power.
My times are actually better when I turn all the nannies off.
This is for Autocross... I cannot do Track days, since mine is a convertible.
But we autocross a LOT.... 29 events this year alone.
For a good nice warm day, using R888 tires, and on a course designed for Miatas,
(lots of turns), what would be recommended settings ?
I've spent more than a year, and spent lots of $$$ on sway bars, and alignment,
and wider wheels/tires, trying to solve this issue.
Last edited by NTMD8R; 07-31-2016 at 10:41 PM.
12-28-2017, 12:49 AM
#28
Melting Slicks
I've been waiting for this mostly complete description for a long time. It's been nearly a year since I personally talked to Alex about PTM at the NCM anniversary. Someone also needs to tell the guys at Spring Mountain that yes the MRC does change with PTM mode (I got into an argument with one of the instructors about that).
The only thing that is missing is that although Alex indicates that ABS is never disabled, it's calibration does change with the mode; it's going to kick in earlier and more agressively in Wet as compared to Race.
Alex also told me that PTM on the C7 is very similar to its implementation on the Camaro ZL1. See http://youtu.be/jHeCT8k2LrA (tried to add as a link on my original edit but it crashed on my phone!)
The only thing that is missing is that although Alex indicates that ABS is never disabled, it's calibration does change with the mode; it's going to kick in earlier and more agressively in Wet as compared to Race.
Alex also told me that PTM on the C7 is very similar to its implementation on the Camaro ZL1. See http://youtu.be/jHeCT8k2LrA (tried to add as a link on my original edit but it crashed on my phone!)
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djnice (08-14-2019)
09-10-2019, 02:12 PM
#31
Heel & Toe
PTM clarifications?
1.) So if the ABS is managing the braking beyond threshold to decelerate the car, is the PTM performing the opposite at managing the power application to accelerate the car after exceeding the grip threshold? In both cases, keep the brake pedal fully depressed during braking and keep the accelerator pedal fully depressed during corner exit and let the system drive you out?
2.) Is the vehicle wheel/ground speed mentioned in the response and angular wheel velocity or linear ground velocity? Will installing larger diameter tires effect the PTM?
2.) Is the vehicle wheel/ground speed mentioned in the response and angular wheel velocity or linear ground velocity? Will installing larger diameter tires effect the PTM?
09-10-2019, 04:05 PM
#32
Melting Slicks
It’s better to learn to push the car to the point just before ptm tries to help.
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ShadyVette (05-10-2020)