I have a kleemann supercharged 1999 E55 it is nearly 500hp and now im upgrading the car to 600-620 hp but i have a problem ((((wheel spin))))
I fixed:
1-Michline pilot sport cup tyres but on the original wheels 265/35 R18.
2-LSD Limited Slip Differential from kleemann.

What else could help to reduce the wheel spin?

Anybody have an experience please help...