Even if you have an open differential, you can still lay 2 strips of rubber, AS LONG AS YOU HAVE EQUAL TRACTION WITH BOTH DRIVE WHEELS. You only start getting into trouble if one drive wheel has less traction than the other.

When you press the ESP off button on the C32, the traction control is completely shut off but the stability control system is still lurking in the background. If it senses you are going sideways too much, it will intervene again.

The 135i and C55 DO HAVE the electronic pseudo LSD system, but the 335i DOES NOT.

This electronic pseudo LSD system is one of the major reasons why the C55 is quite a bit faster around a track than the C32 because it can put down the power much more effectively coming out of the turns (when driven with ESP "off" by the pro drivers).

Hey there PC Valkyrie:

I have to respectifuly disagree with you about the C32's diff.

I have had several 250-350 HP rear wheel drive cars with an open diff, with no electronics, and they could NEVER leave two black marks on the ground. One wheel would ALWAYS spin, NEVER both. Espically coming out of corners on the track. You are correct about equal traction, but this NEVER happens in the real world. One wheel will always see less traction, from slip angle, weight transfer, road conditions, etc, etc.
Somthing in the electronics allows us to light both rear tires up, aka FAKE posi. I have tracked my C32 numerous times, and even with the ESP off, I have NEVER light up the inside wheel, coming out of a corner, while in DYNO mode, you are dead on and the inside wheel would always spin. And as everyone knows, Dyno mode turns off ALL electronics. Hence I do believe that the C32 has an electronic brain crerating a fake posi.
Yes a TRUE posi would be better for the track, but again I beieve that the C's do have a electronic brain, aka posi.

See yeah:

PS: I was truing VERY respectiable lap times at Beaverun, so I do not beleive that I was driving like a whimp. Hence I should have been lighting up the inside wheel, if the electronics were not helping us.

MRAMG1, I guess Splinter's experience is very different from yours on the C32. It seems like he can lay down 2 black stripes if the car is on level ground going straight, and he does spin his inside wheel when he exits some turns on a track when driving with ESP "off".

I don't discount what you're saying, but Splinter's experience is in keeping with what the official press releases say about the differences between the C55 and C32.

Also, when Sport Auto tested the C55 and found it to be much quicker than the previously tested C32 on the Nurburgring and Hockenheim, the pro driver who drove both commented on the fact that the C32's "traction problems" were solved/improved with the enhancements on the C55. To me, traction on a twisty track implies ability to get power down powering out of a curve.

10/4. I certainly can understand this info/fact. It could have also been, that Beaverun only onloads the inside rear wheel in two turns, one of which is an uphill sweeper, so that certainly could have helped as well, ie weight transfer. And, my Bridgestone 050 PP's are REALLY sticky

Thnaks for the info my friend, and you bet that I would LOVE to have a TRUE posi, just can justify spending $2200 on a quaifi at this point in time in my life, aka kids.

See yeah