Hey guys,
There is a program available on the net called Cartest version 5.1 i think, anyway its all mathematical equations which allows u to work out ET's and Top speeds and stuff.
All u do is enter the details of ur car, EVERYTHING, engine size, Turbo/NA, Gear ratios, Wheelbase, size of tyres, drag coef etc,
and the program can work out supposedly optimal launch revs, ET's, TS etc.
Very useful and fun, and also shows wat ur car is theoretically capable of. Anyway i thought it was heaps of fun. Try it.