froggy47

What model year was this introduced?
Has it been "tweaked" in subsequent years?
Do you use any of the settings?
Track
Autox

Does this replace "launch control"

AUTO_X_AL

2014 on mag ride equipped z51.

I'm sure the software has been updated here and there. You can purchase the "rough track" update at a dealer for $325 on Z06 models.

On my stingray I put it in track mode and disable the the PTM, traction control, and stabillitrak.

z28lt1

I believe the first usage was the 2010 ZR1.

It does not replace launch control, but you can use launch control with it.

AUTO_X_AL

Sorry, I associate PTM with C7. It originated in the CTS-V I believe. Somewhere around 08-09 I think.

froggy47

Here is a thread from M5POST re:



http://f10.m5post.com/forums/showthr...0#post18553250

So is/was "available" on 11/12/13 if ordered/equipped.

Rough Track update sounds a little like teflon lifetime coating on the paint or maybe more like a 200/300 dollar nav map update. Watch out for that one.

AUTO_X_AL

It does have some validity for those who run rough tracks a lot. It relaxes the shocks to be a bit more absorbent. Why it costs so much I have no idea.

froggy47

Not to but I thought the whole point of these mag shocks that adjust a "insert a very large number" of times per second was to handle all those variations.

AUTO_X_AL

The Z07 track mode is set pretty stiff. The Z07 springs seem to be a good bit stiffer too.

Mero programs the MR and it think it may be on the aggressive side so the new cal just dials it back a little.

Poor-sha

I posted this in the C7Z section a while back. Got this from the folks at GM. FE7 is the Z07 suspension and FE6 is the normal Z06.

"The front spring is 62% higher rate on the FE7 than the FE6.
The rear spring is 22% higher rate on the FE7 than the FE6.

The different stab bar bushing tuning helps get the car to the appropriate understeer level.

The MR shocks on the FE7 have a tighter gap which means a higher “passive” curve in addition to a more aggressive MR damping tuning."

I'm guessing that the rough track calibration only affects the active part of the MR damping curve.

I actually tried swapping the FE7 sway bar bushing on my FE6 car and was interesting but not in a good way. The car was pretty prone to snap oversteer. Just squeezing the two the FE7 rear bushings felt much harder and the fronts maybe a little softer material.

Poor-sha

Froggy, did you see the fairly detailed response in the "Ask Tadge" section on PTM?

To be honest I can't say that I've noticed any real lap time difference on track between PTM Sport 1, Sport 2 and Race. If you're smooth the AH doesn't intervene but in theory the higher modes will let you put a little more power down.

I ran PTM Wet one time at VIR in the rain. I should post the PDR video if I can find it but you watch the front end of the car lift as you accelerate and drop when you shift. The PTM was also limiting power like crazy but it's not intrusive like the older systems.

froggy47

Thanks, yes I finally did, I try to do my own search b4 I post stuff, but the CF search engine is so so.

I do still have a question, what TIRE TEMPS does PTM look for in order to "unleash" more power?

Poor-sha

Honestly, I don't believe it does. I know of one person that theorized that to be the case based on something in a GM ad but I don't recall ever seeing anything official on that. I ran an entire weekend on wheels with no TPMS and couldn't tell a difference.

AUTO_X_AL

So it's just the bushing material that's different and not the actual sway bars, correct?

I have a small project that I'm working on and wanted to determine all of the differences between a fe6 and fe7.

I wonder what the rough track cal on an fe6 would do.

Poor-sha

Yes, just the bushings as the bars are the same. You also might want to look at this thread I started yesterday but so far nobody seems interested in but me

https://www.corvetteforum.com/forums...n-package.html

AUTO_X_AL

I'm interested and working on some things. You're quite resourceful!

AUTO_X_AL

Interestingly enough, GM engineering has told me that a 15 and 16 spring are different due to ride height adjustments. They told me the 15 spring would not work.

I have a hard time believing that more than the adjuster screws is any different.

NTMD8R

I only have a 2014 Z51 with MRC, but I have changed the sway bars and wheels/tires.

I have found a few things with PTM and my car.
No matter what sub-mode I select (Wet, Sport1, Sport2, Race),
there was always some interference.
Now I am talking about autocross, but exiting a corner, when I try to get on it, there was always some "bog", even in Race mode.

So, I now disable Traction control and Active Handling, which fundamentally disables PTM, and it does what I want it to.

Poor-sha

Which springs are different? front/rear/both? Are the FE6 and FE7 springs both different?

AUTO_X_AL

All I know is that they told me that the fe7 springs are not available right now due to a ride height change. I'm looking deeper into this.

AUTO_X_AL

Gm says the FE7's front and rear are not available.