Unsure on what diff i need

[djcockrin 0]

Hey, I'm just wondering what differential I'l need for my 320i 88'. My e30 has a m30b35 under the hood. I wanna get a open diff and weld it up for track days, what do you guys suggest i should use? and what housing size would it be small or medium? 3.64 to 4.1 diffs would work well right?

Cheers, Leroy

[BM WORLD 1258]

for starters what gearbox are you running in it ??

me mate uses a 3.73 in his M535i e28 with the overdrive getrag 260 box

i use a 3.91 in my e28 m5 with the same gearbox.

but being a lighter car you could stay with a 3.64 etc

but if you are using the dog leg close ratio box then a different diff woul dbe needed.

see he and work out your revs etc..

http://members.dodo.com.au/~wawawa/revs.htm

[djcockrin 0]

Thanks Brent.

[Ahmedsinc 414]

Have a 3.64 E30 medium case open available if you want it. PM if interested

[Ace Of Spades 51]

I have a 3.64 locky bro, PM'D

[BM WORLD 1258]

i also have a 3.91 med LSD and 3.25 med LSD for sale

to fit e30 e28 e24 etc

[gmccormack 0]

3.64 is too short even for the 2.5L engine for which it was intended. You need to load the 3.5L up, 3.45 or lower if you can find it.