Pierre

I have a little bit of experience with my Turbo on dry, wet, snowy and icy roads. With PSM off, it's pretty easy to have the rear come out.



Ok, these pics are not exactly on the dry, but the same kind of behaviour happens on the dry too. Is something wrong with your car?... Weird...

--p

FixedWing

Are you sure this isn't the basic viscous differential AWD design of the car coupled with the too-small front tyres?

My understanding is that PSM only kicks back in when the brakes are applied.

Stephen

GreggT

Stuka...........congrats on making it out of the slow group. And, if I may, reading this may help you understand your PSM a bit better Jack Miller on PSM

Kiko

When you throw the car into the turns and somp on the throttle with the PSM what does it happen? Does the car kill the power or the car understeers? If its the 1st all you need is to make a few changes to remove the cars artificial tendency to understeer (doing suspension, rear GT2 bar, wheel alignment and 235 tyres) this way the csr will show a neutral handling and when you stomp on the throttle oversteer will be present at your will. If the PSM still cuts power under acceleration mans its not desactivated.

Dock

I agree. With PSM off, I have no problem at all hanging the tail out.

GreggT

Agree........I'd add that on the track, with a moded suspension and R compound tires, the 7% slip angle may be enough for you to work with......but flip it 'off' if not......in the wet is a dif story.

Woodster

I need to try this, it was a huge fun factor in my previous 993TT!!

Marty

stuka

PSM kills power, and yes, that big amber PSM light off is staring at me from the dash.

stuka

OK, maybe I am not making myself clear.

When you begin your turn in, you keep the steering bound up (do not unwind), you leave it in 1st, you stomp on the throttle.

The rear end drifts out a little, and then it stops drifting because PSM, now with that big amber light staring at me from the dash, decided that the car is sliding and it must correct itself, kills the power.

Now, in a normal rear biased or RWD car, the car will keep sliding until a steering correction is made. This is NOT the case with PSM, on or off, doesn't matter. What I want is when I do the above, the rear will continue to come out, as I leave my foot planted on the floor, and correct the car myself.

This is not allowed under PSM. On or off.

stuka

Funny man, Mr instructor.

I have read that article, and PSM still sucks. My point still stand that PAG should have made PSM totally defeatable, like any 30K BMW.

That is not the case here.

stuka

As I said in another post, let me clarify.

PSM will allow you to get the tail out a little, but it WILL NOT, at least on my car, allow the slide to continue. As inm if you keep your foot planted in 1st and second while keeping the steering bound up and do not unwind, PSM will turn itself back on and kill power, stopping the slide.

A normal rear biased AWD cars or RWD cars will continue to slide until the driver does something to correct the slide. That is what I want, and what I am not getting.

Dock

With the PSM on, the system will allow about 7 degrees of side slip before interviewing.

With the PSM selected off, there is no system intervention *at all* until the driver engages the brakes.

If you are experiencing PSM intervention with the system selected "off" in the cockpit, and without any brake application, then your car is malfunctioning.

stuka

OK, here's what happens:

1. 1st gear, turn in, keeping the steering bound up and do not unwind.

2. PSM shows that it is off.

3. I stomp on the throttle.

4. The car drifts a tiny bit, then the PSM light flickers, and the car stops sliding.

So this is the car malfunctioning? Boy, am I going to have fun trying to have the service guy replicate this along with my clutch problems.

Dock

Yes.

Kiko

Have you tried in 2nd gear and rolling? I did some donuts once in first gear but it was wet probably its a 1st gear protection thing, try sliding the car in 2 nd on a wide area... if it kills the power with the PSM off (remember PSM is with the red buttons light lit) then the car is malfunctioning.