Actually, that's the proverbial double-edged sword. Yes, with the engine in the back you have a ton of weight on the rear wheels and therefore a lot of grip. However, once you lose that traction for whatever reason (e.g. road conditions, going too fast, lifting/braking and shifting the weight to the front in a turn, etc.), then that weight in the back will cause a pendulum effect and swing that big rear end around to the front faster than you can say "Oh Sh$t". I'm thinking that PSM just might save one's bacon in that situation.

PSM might be even more useful in the non-turbo car. I would guess that the AWD in the turbo would help you to not spin out.

 

i am in complete agreement with aerodude. my 2002 C2 didn't have PSM and when i lifted to avoid a head on collision while over taking a slower car, the car was out of control. i am not sure if PSM would have saved me but it sure would have helped.

get it. i think if it helped 10% in an emergency, it's worth it.

if you dont have it, i would advise never taking the car to the limit. it's easy to drive to the limit in a 911 but not easy to recover.

 

My 99 has a LSD. You know you have one in a 99 if you have a TC (Traction control) button on the dash. IN know not all 99 or any yea where they all have LSDs. It is an option and one not normally need or desired unless you plan on driving the car hard and fast ( on a track).

 

Wouldn't drive a car without it, I have the C4S and you can actually feel the car adjusting when I push her.