The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
I don't understand... (archive)

[ Follow Ups ] [ E30 M3 Message Board ] [ Msg. Board FAQ ]

Posted by Jon on August 17, 2001 at 10:55:38:

In Reply to: My rear GC setup is ... (more) posted by KevinS on August 17, 2001 at 10:35:44:

I understand the front. What about the rear?

You said there is a coilover perch that replaces the stock spring pad? Does that mean the shock goes from the stock lower spring perch location to the upper shock mount?

My thought was to spread the load between 1. the stock upper and lower spring perches, and 2. the upper and lower shock mounts. My concern was placing all spring and shock loads on the factory shock mounts alone.

What components are actually taking the spring loads and shock loads with the GC rear setup?


... totally adjustable.

There is a cool coilover perch that replaces the spring pad in the factory location.

So to answer the question, you can use the GC to have rear height adjustability and the setup is located in the factory locations. In addition you can select from a variety of 2.25" ID springs for the rear (2.5" ID for the fronts).


88 ///M3 retain factory-type rear springs only the rates get cut about in half? Then you put coilovers on that also have a weak rate. That way you have adjustment but you don't put all the load on the shock mounts.

There was a GRM article on lowering a 944. They did the same thing except, of course, that car had stock torsion bars instead of coil springs. They actually just unloaded the torsion bars a bit and put on the coilovers.

I'm sure you could get the right rate to do this in the coilover spring since those are probably standard size, e.g. 2.5" or something, but I'm not sure about the stock spring. Is there some standard sized spring that fits on the rear perches or is that completely application specific?


Follow Ups:

[ Follow Ups ] [ E30 M3 Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk. Logo © 1997 - 2018 Jump Internet Inc. All rights reserved.