e30 s50 turbo what rear end to use ?

[Wanganstyle]

Lowest possible # for traction and loading of turbo.

[Lurker27]

The pistons are thermally limited, I run meth+water inject on the biggest mcmaster nozzle. I also have a ported custom cam, flipped manifold, oring'd block w/ ARPs, bottom end rebuild, full 4" exh. It blew up my trans though so it's down right now.

would not recommend more than 15psi on a stock motor, they just choke past that anyway, M30s are terribly lift limited, so you need a very on point valvejob and then a cam can run 30% more valve curtain or so and wake it up @ high rpms

[einstein57]

m30 turbo (~500rwhp ~600rwtq) has no traction in 3rd already with a 2.93, it's tall but going higher is literally retarded

Impressive. From what i hear that pretty hard to do with that motor.

[SwiftE30]

^this. picked up one at the end of summer. can't wait to see how it feels with my turbo.

[Northern]

Turbo? S2.93 definitely

[rneedham1979]

I run a 2.93. I have run as low as 3.46 but it wouldn't fully load the turbo in 2nd. The car would go through the gears too quick. The 2.93 is leaps and bounds faster... I get full boost in 2nd and she just pulls for ever. Less shifting too

[Lurker27]

m30 turbo (~500rwhp ~600rwtq) has no traction in 3rd already with a 2.93, it's tall but going higher is literally retarded

[Robotin]

go big, 373 or 411

[bmwdready347]

Thanks I have a 293 and will put it on this week

[Cyrix2k]

2.93 or 2.79

[ak-]

im useing the m3 zf tranny and thanks for the reply..

You want an S2.93 then. I can't imagine using anything higher to have a usable 2nd or 3rd gear.
My bud is going through the same process right now, s52 turbo e30.

[ak-]

from what ive heard from people in the past. using a S3.25 out of a e36 m3, or a S2.93 out of a ES e30 (or optioned eta).

It's important to know what transmission he's pairing it with though.
An s2.93 on a ZF is like an s3.25 on a 260trans, sort of.
But an s2.93 on a 260trans is balls.

[bmwdready347]

im useing the m3 zf tranny and thanks for the reply..

[Robotin]

from what ive heard from people in the past. using a S3.25 out of a e36 m3, or a S2.93 out of a ES e30 (or optioned eta).

[ak-]

260 or ZF transmission?