I have at last found a 130sri engine which I am going to stick in my astra stock car. Which gearbox and diff should I use as. I want as much torque as possible at the bottom of the rev range so as I come out of the bends in second I have all the torque.
I will be using the Quaife which at the moment is fitted to an f20 16v box.
the most common FDRs are 3.55 in both the f16 and f20 CR boxes, so that makes my speedo spot on to the calculations (or at least overreading slightly, but with 3.42 it would be underreading everywhere, badly above 100)
if anyone definately knows different they better let me know or all my speeds are off