Im big into road racing so this is where i am happiest. As Far as the best differential depends on many factors. Starting with your motor, what kind of RPM is it capable what is its torque curv elike, Max Torque, car weight, type of track, is it daily driven or full race. Then there are personal preferences. would you rather leave the corner faster at some sacrifice of top speed or have a bit of extra speed for a slightly slower exit out of a turn (That is where depends on track comes in).
My Car runs stock 4.088 (the SC) and limited slip (Torque sensing not viscous but it does the job) It makes it great for corners and straights. Although due to the ammount of power i put through it now if im not careful i can easily convince the back end to swing about.
Tell me a bit about your car and i might be able to help you.
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Proveyer of everything Different.
1996 SC300 5spd ~"Some Mods" **cough**
1987 Pontiac Fiero Project. Ask for Details
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