I'm wanting to drag race our C63, and was wondering if people are having good results with drag radials on the rear despite of not having a LSD? Right now it gets off the line decently, but if I use the race start function, it immediately starts spinning bad enough to upshift into second gear and then bog out because of the lack of speed.

Or would it be a waste of tires to upgrade without upgrading the retarded open diff. that somehow made its way into a factory 450hp car??