www.ubersaloons.co.nz/uber3/uber3.html

[sbullard878]

I was looking at some e30s on the web and found this has anyone done this to an e30 looks to me like he swap the whole rear subframe and trailing arms from a e28 would this be better than the e30 rear supension looks interesting

https://www.ubersaloons.co.nz/uber3/uber3.html

[sbullard878]

bump no one has any coments on this?

[DEV0 E30]

He's on here.

He did that for the 5 Lug.

[thejimlab]

his intercooler isn't big enough

[E30-323ti]

I used the E28 rear end because you can't get any M-coupe rear ends here, and the E30/E36 'ti axles are shit!!

The E28 backend has big 6-bolt CV's on both ends of the axles and I have put a Supra LSD in there also because BMW LSD's are V.hard to find and expensive to rebuild.

I have also got Coilovers on the rear and Big Porsche 996 brakes.

Been driving it around for a few weeks now with this setup, need to get an alignment done so I can see what I need to do the rear (to much camber & toe at the moment I think).

[var1ant]

sexay

[1991 318is]

Questions - questions

What is an E28? I couldn't find it on RealOEM.com for a look at the parts.
I love the use of two CV's at either end of the axles always thought they would be ideal for the driveshaft instead of all those U-joints and slip yokes. I tried to get all kinds of SCCA types to try it with carbon fiber shafts and for years I have gotten blank stares in response. The type of CV's on the inner rear halfshafts and at the rear of a 5 series driveshaft are light and can move about 1/2-3/4". A fixed differential is the perfect setup for one.

[Jordan]

Guys, to clarify.

He did that swap out of desperation.

Not because its better or desirable, or anything of that nature.

[browntown]

What is an E28?

all the e numbers explained: http://bmw.hlabs.spb.ru/e.html

[E30-323ti]

Guys, to clarify.

He did that swap out of desperation.

Not because its better or desirable, or anything of that nature.

It does have some pretty good points but is in no way a bolt-in.

Like:
The Trailing arms have a 12degree sweep angle (15d for E30 & E36 ti, coupes & roadsters), this means the toe & camber don't change as much with suspension travel.
I have also retained the "Dog-Bones" these further reduce the toe changes.
The subframe is about twice the size, so if it every bends chances are the car is F*#ked, as are the trailing arms (which are substantially braced even compared to the M-Coupe ones).

so not quite "desperation", more carefully assessing the pro's-con's of so much fabrication work, a 9" would be desperation :)

Oh, and ask Saku, Kilander or Andreas what back-end they run in there +700hp monsters... E28 :)

[conrod]

Interesting point to note, on the "gruppe A" E30 M3, BMW Motorsport changed the geometry from 15 degree to 12 degree trailing arms. They obviously felt the 15 degree setup gave too much camber and toe change for circuit racing.........

[Borat]

dam jordan, just cos his car would give yours a major ass kicking doesn't mean you can't say good job or nice work

[1991 318is]

Thanks for info.

Thanks for the "E" number link.
As to the 12 degree question, the M3's have less body roll-hence less camber gain. (IMO) the best improvement to an E30's handling is minimizing body roll with better(stiffer)swaybars, mounts, and links. Especially before stiffer springs.(/IMO) Link is to graphs of toe/camber changes per inch of wheel travel for the 12(M3) and 15(E30) degree arms.

http://e30m3performance.com/tech_articles/susp-tech/rear_curves/index.htm

From these changes you have to subtract body roll. Less body roll=less static camber.

[conrod]

I understand what you are saying, but I think you may have missed my point. What I am suggesting is that BMW Motorsport probably tested the group A car initially with 15 degree trailing arms, then 12 degree arms, and found the 12 degree setup worked better, all other things(on the race car) being equal.

[1991 318is]

Just curious.

E30-323i wrote "Oh, and ask Saku, Kilander or Andreas what back-end they run in there +700hp monsters... E28" Just curious but what differential and axles do they run with 700 HP. The usual choice is Ford 9" with housing converted to axle flanges or a Hewland.