991carreradriver

I have read through the posts quickly, so forgive me if someone covered this. I have seen PASM failures that do exactly what the OP has described on the track. If it was a PASM module failure (the fault would indicate this), the car would behave exactly as described on a straight. Depending on the condition of the car, I would pay to have the ECU dumped to determine if the PASM failed. This may help to restore confidence and expunge this from your driving record.

JCviggen

I crashed my 982 GT4 with PSM on when it lost the rear at high speed due to a crap alignment that lacked toe-in, with PSM enabled if you go sideways enough it will give the PSM/ABS error simply because it threw in the towel unable to correct the slide, not because the module is faulty. We repaired the car and it's driven well ever since.

168glhs1986

Cup 2 anything on the street is such a waste. PS4S and give yourself the best chance for survival.

Mthrice

Edit. I took that on ramp North today, it felt a bit off camber. The one across the way turning onto Roy Horn is nuts.

Solarium

Wow, I also live in Vegas too and get on that 215 northbound from sunset all the time. There was once I'm not even sure that I was on the right lane and all the sudden lost traction too, and my older daily (F82 M4) slid out but I corrected it. I always thought it was a fluke.

Really sorry to hear that. I wonder if something like this is due to the pavement and you can hire a lawyer?

gt3forme2017

> All the sudden the pavement changed from smooth to groved and the back end was gone, immediately.
> I noticed it (TC) flashing even over 100mph with new Cup 2 R tires.

One possibility is that the change in road surface caused the TC to make a large input. If they don't have grooved streets in Germany than they may have never tested for this case.

I can imagine how a change to grooved pavement caused the TC to register sideways movement (isn't that what grooves do?), and made a big correction. Also, this could happen only with certain tires and only at certain temperature (maybe the tire itself was not warmed up?) I imagine that tires need to be warmed up, even if it is 110º outside.

Unfortunately the only way to figure out what happened is to get the computer logs at the time. I don't know if there is a log of the inputs (especially TC).

The only other way is to reproduce the issue (which will be very expensive). And, even if you do, I doubt anyone will want to update the software to fix it...

gravedgr

Disagree with this and find the 4S to be insufficient in the mountains, although I do wish I had them in the rain.

juanpablo046

I've driven with Cup 2 R's year round, GT2 RS and no issue with traction in a straight line. I would still think some specific issue with the mentioned car.

VanMcQueen

Damn, relatively speaking, these cars ARE stable. For this this to happen exactly at a transition to grooved pavement means something with the road design/car spec caused instability when the change occurred. I guess it could be caused by road design/car programming, but I bet you couldn’t replicate with with other GT/turbo models at those exact speeds and conditions. My money on specific GT3 set up (including PSAM programming) combined with road conditions, combined with speed were the factors. Computer probably couldn’t match grooved pavement transition at that speed. Not critiquing the driver at all…I (we all??) drive our cars at these high speeds…It’s why we own them. But it think we are risking it at times when a highway happens to NOT be designed for the speeds that we (sometimes) drive.

Could a case speeding at 90 mph, be won in USA? I just ask, because I honestly don’t know.

rob944s2

Going back and re-reading this thread I wanted to add that I've lost control on two separate occasions getting on the freeway here in Las Vegas, but not in a GT3. 1st time was in my old 944S2, the 2nd time was in a 968. In both cases I was not driving hard, just normal onramp acceleration. In Las Vegas, our onramps and freeways can get very slick, especially after the 1st light rain when it's been dry for a long time. All that oil and grease build up during the dry season and becomes very slippery after the 1st rain, especially on the onramps. One onramp in particular, getting on Summerlin Pkwy from Rampart headed East is super slick almost year-round.

Not saying this is what happened in OP's case and I don't know what the weather was like when it happened, but just an anecdote from my experience driving here in LV.