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Can you spin the wheels with PSM on?

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New member
Just curious if you observe the same as me:

In the current damp conditions, giving it full throttle in second results in the rear wheels slipping. Not exactly a big surprise.
However, the amount of slip seems quite generous - I was expecting the PSM to intervene to limit it a bit (with a bit of rear brake). It is enough to leave some lines in the dampness, viewable in the rear view mirror, and isn't just for an instant but prolonged giving me time to lift slightly (no point shredding the tyres - if it's not translating to forward motion it's wasted).

It's not a problem, but maybe the system has "learned" to give me a bit of lee way or the threshold is higher than I expected.
 
Stuart - I think that this should be independently validated.

Let me know when you're free and I'll drop by and test your car out for you. All variants of wheelspin and donuts will of course be explored!

[:D]
 
My only experience with PSM was in a boxster and it definitely didn't allow the wheels to spin, they would chirp then the power would be cut to them straight away, certainly before any human could intervene. You could get the back end out slightly (up to a 7% slip angle I believe) before the PSM cut in.
 
Exactly, on the C4S the traction control would cut the power as soon as anything thought about happening (which was quite annoying). This was noticeable when hoofing it out of a turning.

Just for the record, my daily drive is mostly pretty dull but there are a couple of points where maximum attack can usually be applied. This means the car get a couple of seconds of real use a day, and the rest of the time driven at 2-5 tenths.
 
Stuart, it's the same on mine, plenty of wheel slip allowed, which is exactly what you want with PSM only helping when you need it!!!
You get so used to the car being capable in all conditions, but in this recent horrible weather mine had a mid-bend moment, thanks to standing water in the middle of a bend that I know well (I had never encountered water there before). PSM was on the case in the blink of an eye & I for one think it's a must have on a 400bhp+ Porker, we all like to think we can handle a car, but it's nice to know we have a safety net that won't spoil the fun!
 
Happily mine is the same, spins, steps out and snaps in again. In a straight line it seems to be quite a long delay, but I have had cars that as soon as it slips the cars shuts the power down and PSM activates, which is a tad scary if you have just tried to hoof it out of a junction and the power is cut[:mad:].
At least the system gives you a bit of get up and go, usually enough to scare me/passenger
garyw
 

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