View Full Version : Coil overs for the 850..


Bryson
05-29-2008, 05:44 PM
Has anybody encountered any setups like this?
I'm looking for a new weekend project in the machine shop and have been thinking about taking the time to fab up some perches. I'm not looking to dump the car on the ground, I'd just like to be able to play around with spring rates instead of going with the arguably soft aftermarket setups available. Tired of lowered springs depending on the bump stops of the shock in relatively normal use I suppose.
I'd like to avoid having to take my suspension apart just to take measurements, so I was hoping somebody on here might be able to help.
For the front, I need the diameter of the hole in the upper spring perch (where the shock goes through) and outer diameter of the front strut itself.
and the rear I just need the diameter and shape of the upper and lower perches.
If anybody has this info lying around, or the desire and means to measure their own, I'd appreciate it.

Thanks,
Bryson

8Tech
05-30-2008, 09:53 AM
Do you really mean coil-overs for the rear or fitting springs back in the original position? You cannot fit proper coil-overs on the rear because the bodyshell is not strong enough.

To do this practically you need to use 2 1/4" ID springs front and rear but the front strut tubes are too thin/large diameter to get a 2 1/4" perch on them so you will need to go 2 1/2" and make the springs.

All in all, a lot of work and expense just to make a height adjustable set-up.

pinned
05-30-2008, 02:06 PM
The coil overs would also allow for a taller rim/tire combo as the interference is at the strut spring perch in front.....go Bryson

Bryson
05-30-2008, 05:47 PM
Do you really mean coil-overs for the rear or fitting springs back in the original position? You cannot fit proper coil-overs on the rear because the bodyshell is not strong enough.

To do this practically you need to use 2 1/4" ID springs front and rear but the front strut tubes are too thin/large diameter to get a 2 1/4" perch on them so you will need to go 2 1/2" and make the springs.

All in all, a lot of work and expense just to make a height adjustable set-up.

sorry I've been caught up with the term 'coil over' being thrown around. I meant adjustable perches for the springs, I can run whatever diameter I want, the springs front/ back don't have to be interchangeable.

If I can fit a 2.25" spring on the front, or other commercially available spring, the cost of this setup will be only the cost of the springs and the raw materials to make the perches. I'm going to be in the shop anyway, so I might as well be working on something for the 8 :)

I've also been toying with the idea of making different height solid perches as opposed to threaded adjustable ones. This would also circumvent the problem of not being able to fit the 2.25" spring in the front. It would bring the cost down a small amount as well. If the setup works well, I can post up the dimensions and people will be able to run whatever spring rates they want, and adjust the height according to what they want..