Im planning to build a 13B N/A clubracer/trackdaycar based on a 3series BMW as they arte very common overhere and FC´s aint but also for the Project/coolness factor.

So does anyone know the various differential gear ratios for the 83-91 BMW 3 series?

Kim

 

No idea, sorry, but there's plenty of Bimmer forums that should know..

Good luck.

PaulC

 

why didnt I think of that, it seems like this is THE forum that will eventually blind you from anything else

 

If anyone cares... BMW E30 320i has 4,1:1 diff. which is next to perfect as its also a lighter car.
I cant wait to get started

 

Did I read that right? You're planning a 13B in a BMW? Now, that's a whole different story. We thought you'd go boinger, which would make you an ex-friend

 

No Bart, how could you even think that low of me, sure BMW makes some great engines just not for racing, well atleast not in my price range.
Im picking up a 4.45:1 diff in january, which should make for some good acceleration. Stripped E30 13B = Teh shiaath.

Once you raced a rotary there is no way back.
Im allways thinking : "hmm that new sedan looks nice, maybe with a rotary Id buy it"

 

I race with some of the guys from here, a very helthful group!

http://www.e30racing.com.au/