Diff/Gearbox Help!!

[LittleNicky]

Hello people.

I know nothing about gearbox or diff ratios, and am in desperate need of some advice.

I've put an M50 lump in my 318ti compact (1997) and as fun as the gears are.... it's basically crap!! I kept the stock 4 pot gearbox in, but i don't know whether its the diff or the gearbox that needs changing for it to feel like a normal 6 cylinder... kinda tops out around 130mph because 5th gear might as well be 4th


Any advice will be greatly appreciated. I do have the M50 gearbox (which i lazily didn't fit when doing the conversion) - but a diff swap would probably be easier for me (I've got fair hands... am I talking too much??). Anyway - help help help




Nick

(bouncing sideways in 3rd, on some dead susupension)