Performance traction management question

[SlowMoe]

Pmili, when I mention putting it in PTM5 and still feeling the traction kick in I may or may not have been in a open parking lot trying to making parking lot art.....I didnt read the manual and was playing around with the PTM settings to see how intrusive they were. I went off the assumption that since there were lights on my dash showing traction and stability controls were off that the tires would be free to spin but that was definitely not the case with the 5 PTM modes.

[Psuball1]

Originally Posted by TJR172

read the manual!

I surely did!! I just like having the opportunity to ask fellow Z/28 owners for clarification. That's what this site is all about, right?

[stearns.mw]

Does anybody know how much torque is lost in PTM 1 wet mode


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[Stephen12ZL1]

Originally Posted by stearns.mw

Does anybody know how much torque is lost in PTM 1 wet mode


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it is traction dependent as it regulates the throttle blade. I am not sure if there is a maximum torque value in the programming.

[E. Bryant]

Originally Posted by stearns.mw

Does anybody know how much torque is lost in PTM 1 wet mode

The only honest answer is "it depends". The car tries to make an estimate of how much torque can be applied to the rear axle at a given moment, so things such as temperature, weight transfer to/across the rear tires, yaw rate, etc. get factored into the calculation. It's quite sophisticated, and as evidenced by the results, the estimate is surprisingly good across a reasonable range of conditions.

[stearns.mw]

So it's variable based on a lot of different circumstances the car is seeing at the time. Is this correct


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[pmili75]

Originally Posted by SlowMoe

Pmili, when I mention putting it in PTM5 and still feeling the traction kick in I may or may not have been in a open parking lot trying to making parking lot art.....

Ahhh hah. Nice I do enjoy that fine art of Parking Lot Art.

A bit pricey with Trofeos

I just order a Charger 392 Scat Pack for DD I can wait to burn up few sets of rubber.

[E. Bryant]

Originally Posted by stearns.mw

So it's variable based on a lot of different circumstances the car is seeing at the time. Is this correct

That indeed is correct. On the track, you can go WOT at the corner apex, and then feel and hear the car varying engine output as the steering wheel is unwound.

I'd highly recommend reading the link I posted earlier in the thread.

[stearns.mw]

Good info. Thanks


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[URBAN LEGEND]

Originally Posted by E. Bryant

That indeed is correct. On the track, you can go WOT at the corner apex, and then feel and hear the car varying engine output as the steering wheel is unwound.

I'd highly recommend reading the link I posted earlier in the thread.

You've done this? I tried that one time expecting what the TC did on my 11 ZX-10R (sort things out at truly WOT). That TC/electronics package is the best I've ever had BTW.

On my lowly ZL1 I had to correct because the rear end started to step out. I expected to go WOT at the apex and let the electronics sort it out. Not the case. Now I feed the throttle rather than go WOT at the apex.
What am I missing?

[E. Bryant]

Originally Posted by URBAN LEGEND

You've done this? I tried that one time expecting what the TC did on my 11 ZX-10R (sort things out at truly WOT). That TC/electronics package is the best I've ever had BTW.

On my lowly ZL1 I had to correct because the rear end started to step out. I expected to go WOT at the apex and let the electronics sort it out. Not the case. Now I feed the throttle rather than go WOT at the apex.
What am I missing?

I haven't played around with PTM on the track in a Z28, but in my ZL1, it has allowed me to do some absolutely stupid stuff with the throttle in challenging conditions. Stuff like repeated going WOT way early in a 3rd-gear turn on a soaked track in 40F air temps. Yeah, the rear end will wiggle just a touch as the system fine-tunes the desired level of engine torque, but that's about it. I would have launched off the track ass-first had I turned off the nannies.

That being said, there are limits to what the system can do. There have been moments when the stability control system had to intervene due to wheelspin at higher speeds on a wet track when running in PTM1, and I had a four-off event on a dry track in PTM3 when I tipped into the throttle a bit too early and aggressively at the exit of a big sweeper. As good as the electronics are, they don't serve as a substitute for mechanical grip

[URBAN LEGEND]

Originally Posted by E. Bryant

I haven't played around with PTM on the track in a Z28, but in my ZL1, it has allowed me to do some absolutely stupid stuff with the throttle in challenging conditions. Stuff like repeated going WOT way early in a 3rd-gear turn on a soaked track in 40F air temps. Yeah, the rear end will wiggle just a touch as the system fine-tunes the desired level of engine torque, but that's about it. I would have launched off the track ass-first had I turned off the nannies.

That being said, there are limits to what the system can do. There have been moments when the stability control system had to intervene due to wheelspin at higher speeds on a wet track when running in PTM1, and I had a four-off event on a dry track in PTM3 when I tipped into the throttle a bit too early and aggressively at the exit of a big sweeper. As good as the electronics are, they don't serve as a substitute for mechanical grip

I need to play with the PTMs mods on both cars then. I feel and hear PTM 1 working when I go WOT. Sounds like a machine gun. But not the other modes. More to follow.

[s.hammer]

So as much as I hate to revive this, I can say that in PTM 5 there is definitely intervention in rear wheel spin at a point... in my case today it was much earlier than I was looking for while playing at an autocross. Has anyone discovered a way to turn everything off yet???

[stearns.mw]

Hold the button down for like 7 to 10 seconds. All nanny will be off at that point but watch your ass.


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