e12 rear suspension e28 upgrade

Post in this forum for topics relating to suspension, steering, and brakes

Moderators: GRNSHRK, ron, bfons

Post Reply
Grapedude
Posts: 16
Joined: Thu Jul 26, 2018 6:47 am
Location: Blenheim NZ

e12 rear suspension e28 upgrade

Post by Grapedude »

I'm currently in the middle of building an e12 based coupe that will have a forced induction motor. As part of this upgrade I have managed to source a couple of large case lsd diffs (3.07 & 3.45) and am now looking into upgrading the rear subframe, driveshafts/hubs and suspension to enable the extra power to be handled and to give me better options for aftermarket shocks/springs/brakes etc. Now the question is: I have been offered a e28 525i rear setup. It is not the same as a 535i/m5 rear which would be ideal but will it be strong enough and enable the changes I want? 535i rear end for e28 are not common in NZ so waiting for one to turn up is fairly pointless. Is there an alternative ie e32 rear end with mods? they're a bit more common.
1981 635csi
1986 635csi
BUELLRIDER
Posts: 2072
Joined: Wed May 23, 2007 11:31 pm
Location: Baltimore .Md HON

Re: e12 rear suspension e28 upgrade

Post by BUELLRIDER »

I installed an e28 subframe frame an e28 Diesel TURBO with a 325 Ratio Diff in my 81 625 .It was very easy to do.
1981 635 German FRANKEN6ER gray market RIG, 1988 635,91 Nissan 240SX , 1993 Harley 1340ccFXR Super Glide, 2000 M2 Buell 1200cc.
Grapedude
Posts: 16
Joined: Thu Jul 26, 2018 6:47 am
Location: Blenheim NZ

Re: e12 rear suspension e28 upgrade

Post by Grapedude »

I've found a m535 e28 subframe and am waiting for delivery of e32 735i trailing arms which will fit. Makes the rear suspension 8mm wider each side and has the large knuckle hub which will be better for high hp end goal. so hopefully when it all appears and gets sandblasted and painted itll all just bolt up!! :-k
1981 635csi
1986 635csi
Post Reply