Rear coilovers on e30

[SA E30]

Ok, I must be realyl dum, but I can't seem to find anywhere that offers a true rear coilover for an e30...

can someone point me in the right direction.

[erik325i]

Nobody I know of currently offers a kit. Jason at C3 Motorsport is designing a kit, but I'm not sure when it will be finished/released.

-Erik

[Bruce Colby]

Try http://www.a1racing.com/. I have their Bilstein setup on my car and it works fine. If you go with rear coilovers, you'll have to beef-up the upper shock mounts if you haven't already done so.

[Eric]

Nobody I know of currently offers a kit. Jason at C3 Motorsport is designing a kit, but I'm not sure when it will be finished/released.

-Erik

then you must not look very hard.

both KW Leda, and Gaaz make a kit with rear coil overs. i priced the gaaz kit and it wasn't much more than GC or C3

beefing the rear shock towers is an internet myth. i've seen lots of cars banging around germany with full coil overs.

[Mike B.]

There is also AST - http://www.ast-usa.com/ast_4100.php

[SA E30]

Thanks guys I didn't realise the KW ones were true rear coilovers, but I wouldnt buy them either, not with the fitment issues I've seen on 2 E46 M3 race cars, and a 540i Superchaged track toy.

and yeah, rear shock towers have been beefed up, they tie into the cage so it's not an issue.

[Teaguer]

There is also AST - http://www.ast-usa.com/ast_4100.php

For all your AST needs don't forget to check out Vorshlag.com .

Heres a pic of the set-up on the Vorshlag E30 318is :


As you can see , event though the rear has a full threaded body for a true coil-over set-up , they chose to mount regular coil over springs witht threaded adjusters .

I'm not really sure of the reason why but i'll be sure and ask them next time I see them in person .

[SA E30]

That upper spring mount is very intereting...

[iflytii]

As you can see , event though the rear has a full threaded body for a true coil-over set-up , they chose to mount regular coil over springs witht threaded adjusters .

I'm not really sure of the reason why but i'll be sure and ask them next time I see them in person .

They are preparing that car for a particular auto-x class and I don't believe moving the spring to the shock body (true coil over) is allowed by rule. A second reason might be that it's not the smartest idea to go to a true coil over without reinforcing the shock tower which again would likely fall outside the rules of the class they are preparing for.

The Vorshlag guys are pretty good to deal with, I wouldn't hesitate referring them for any of their products. I've got a pair of AST 4200's on order and will match the rears as soon as I get some $$ rounded up.

[mazur]

Why are you looking to go true coilover in the rear. I always thought the "modified MacPherson" we have in BMW's is a better design when it comes to handling.

[matt]

Why are you looking to go true coilover in the rear. I always thought the "modified MacPherson" we have in BMW's is a better design when it comes to handling.

There is nothing McPherson about the rear suspension in e30s.

We have rear semi-trailing arms.

Going to true coilovers has a few benefits, the first of which is that the shock and the spring will now have the same motion ratio.

[SA E30]

Is there anyone that does a true rear coilover with a Koni Yellow ?

The reason I personally want to go with a true rear coilover is because it's soooo cool... haha, no seriously though.

The car I am building is a balls to the wall racer, and I feel that by leaving the std setup in the rear is wouldnt be doing justice to the front, that is full rose jointed, and solid mounted, and at a slightly later stage once the car is up and running I'm planning on doing a tubular front control arm, the rear is a probably also going to be modified at a later stage, so going with the std seperate shock and spring would mean that I would need to buy a true coilover in the rear at a later stage, so rather not waste money, by spending twice .

[iflytii]

Is there anyone that does a true rear coilover with a Koni Yellow ?

Probably not. TCKline (and others I assume) can do a Koni Series 28 shock though. FYI, Ground Control can outfit a true coilover with their AD shocks and of course you can always go the Moton route if you want something really cool that hasn't already been mentioned.

[Massive Lee]

The leverage effect of the stock spring location vs coil-over is way beyond the demultiplication in spring rate. The problem with a spring located somewhere between the wheel and the pivots (trailing arm mounts) is the added stress it puts on the pivots. To the point when it could even brake the helm-joints if the spring come to a bind. A rear coil-over set-up is way easier on the trailing arms mounting points.

[SA E30]

I wonder if an e36 true rear coilover will work on an e30 ?