i turned PSM off.

i was at BW today. those of you familar with T2, button hook will cotton corner will know what i am talking about. those are very tight corners. i enter T2 hot and brake very hard, pitch the car and then goto WOT forcing it to oversteer to make the tight turn. in that situtation, i can get PSM to come back on (the light flickered) without ever touchign the brakes.

at cotton corner, i muscle the car in and pitch it around, there, the PSM light will flicker too.

since the light flickered, i ASSUME PSM was kicked in. however, i simply igored the warning light and drove the car as it had no PSM. other than the light, i CANNOT feel that PSM is interfering with the behavior of the car. i can slide it, force it to oversteer, hang the tail out a bit..... i dont feel throttle cutting in and out. it felt NORMAL, like my C2 GT3 without PSM.....

just providing a data pt.

 

I get the same thing; the light flickers but I don't feel it cutting in. I think since it is always watching, in standby mode when you "turn it off", it still flickers the lights when it detects wheel spin or sliding.

 

the PSM flickkers all the time when you are driving at the limit. It is basically for warning as if saying "If you had PSM ON you would have been saved, now you are your own"
Enjoy it, if it doesn't flicker, you are just not trying hard enough

 

I had a similar experience when I first got my car but I didn't look at the dash for any lights. It was below freezing in January when I gave the car some gas coming out of a shopping center parking lot. The rear end slid out a bit due to lack of traction but was perfectly controllable and I didn't feel the usual yaw control corrections I would feel in a BMW or Audi. I hadn't turned the system off and I either didn't go far enough to activate PSM or it is very seamless. My prior BMWs and Audi would have had DSC/ESP engaged under similar circumstances.

Alan

 

Currently my wife drives a 328i with DSC and I the 996 with PSM. PSM is much more forgiving than BMW's DSC. DSC is such a nanny that you can’t even get the rear to ever so slightly hang out without it cutting the throttle. Even the slightest wheel slip cuts the throttle. PSM on the other hand will allow you to have some fun. The amount of fun depends on your inputs. When the rear starts to slid if you apply the brakes or too much throttle or even to much steering input, all the fun is over. However consistent smooth throttle with some corrective steering will allow you to hang the tail out ever so slightly. There is slip angle that will kick in PSM but it can be increased by turning the system off, and with the sport mode of the SC the slip angle is increased and the “off” setting thresholds are further increased over a car without SC.

In slippery conditions BMW’s DSC is much more attentive to yaw conditions than PSM. DSC will activate much sooner than PSM. I have driven in some ice conditions where the BMW DSC light will activate quickly and often even on straight roads under slippery conditions; however, I have also been in a situation (straight road icy conditions) where PSM has allowed the car to become very unsettled. PSM allowed the tail to “waggle” while driving straight with constant throttle. It was rather unnerving (I adjusted my speed slower and everything was fine) and under these conditions the DSC is a superior for the inexperienced driver. The great thing about a Porsche in wintry/slippery conditions though is the feedback the car gives you to what is happening between the wheels and pavement (or lack thereof).

 

if i dont turn of PSM, i can feel it coming on if i try to throttle oversteer the car or drift with too much slip angle.

if i turn off PSM, then i dont feel it. like pete mentioned earlier, maybe the light was just a warning, but the PSM mechanism didn't actuallhy engage.

i like it, i can still slide the car around. especially coming off magic mountain (button willow), oh what a feeling when you car drifts side ways until the exit berm then come straight.....

 

Hi,

It seems you experienced ABD (Active Brake Differential) it tries to cover the missing LSD.

Cheers
Thomas

 

an LSD on the cayman S would really shine....

 

i think you are right.
farnbacher loles makes a LSD for cayman, but they will not sell it a la carte. you need to buy the whole cayman GTR at 120k....

i am sure someone will have LSD for this thing soon. it will be nice. i am committed to this chassis.