Originally Posted by bertrandsv87

I always run front aluminum spool and rear aluminum ball diff(sometimes with ceramic balls), no shields in the drivetrain Bearings, except the wheel Bearings(teflon sealed only), and CF driveshaft at all times........ I call my Car the tc4.1 with all these upgrades........ I was going as fast as the belt cars down the straight with 55t/40t(no motor heat) , so now I'll try 55t/43t just to see what that will do... I got to push it hard at this point.... Others gear their belt cars from 3.8fdr to 4.2fdr, and are very hot at the End of a six minute run.....