Camber adjustment with IRS
 

What options there are to make an IRS rear-axle fully camber adjustable?
I know that Porsche 944 trailing arms have an adjustment for toe and camber, but converting to Porsche bits is too $$$ for my budget.
Swapping trailing arms and rewelding shock mounts wont go with Finnish authorities.
Oliver; is there any high-tech "käfer-cup way" for this?

Justin

Hi

You can just use the early 944 spring plates and then you would just need to drill 1 extra hole in your bug trailing arm to make it like a steel 944 arm.

Steve C

I would go the porschepart-way if I had the money...I would like to do several other things if I had the money...but with a low budget I`ll have to make up something else.
Justin

Justin,
IMO there is no camber adjustment possible in the rear, not even with the porsche parts. The porsche parts only allow fine ride heigth adjustments (it has an extra excenter bolt for this) and toe adjustment. Toe adjustment is already possible with all IRS and swing-axle set-ups...
This question was also discussed in another GL forum, if I remember correct. It was suggested that camber was only to be altered, when you would reweld the pivot point of the arm (in the corner fork/torsion housing) at a higher level (if you want to reduce camber).
Walter

It is possible to adjust camber, I've done it!
Enlarge the holes in the spring plate and rotate the trailing arm in these holes.
For example, if you want more -ve camber on the rear right wheel, as you look at the hub from the side, rotate it anticlockwise, then tighten up again...

Hope this helps,
Rich

Rich,
I must have my suspension definitions mixed up, I guess, since I thought camber meant the 'vertical-ness' of the wheel. i.e. if the wheel stood 100 % straight or vertical, than camber was '0'. And if you have a swing axle with a lot of lowering, you got a lot of negative camber.
Also when you proceed as you describe, with elongated holes and the trailing arm goes down i.e. turns anti-clock wise, then you will also raise the cars suspension? When than as a side effect the camber also changes, than I really wouldn't describe it as a adjustable camber setting methode, but than again I'am really no suspension guru...
Or have I got it all mixed up???
Thanks in advance for any explanations.
Walter

Wally- You are correct.

Rich- You are speaking of caster, not camber.

Both get mixed up alot.

Sorry, I'm correct on this one as I have done it!
Wally: you are correct in what camber is...

If you think of the axis of the rear stub axle, it is not in line with the rotation axis if you rotate it in the way I described. The rotation axis being the inner trailing arm bush and a point in the middle of the 3 bolts on the spring plate. I agree that the caster of the assembly is changed but don't think it has any real affect on this suspension design.

Rich
PS when I said elongate the holes on the spring plate, do it in such a way that enables the movement that I described, not all parallel.

hi

To get the most out of what you have as far + camber is concerned, jack up car, loosen the bolts & nuts on your spring plate, put a jack under the shock mount and raise it until all slack is taken up, tighten bolts, this will give you maximum + camber, your moving the arm anti clockwise like Rich said, if want a little more do what Rich said to do with bolt holes.

Steve C

I'm sorry. I thought you were speaking of something else. My apologies Rich.

Don't worry, I had to think about it for a while to convince myself it would actually work after a friend told me of this method...

Rich

So basically you are lowering the car, without changing the splines on the torsion bar, to gain some camber?

So I could weld an eccentric adjustable fixing onto the springplates connection holes (similar to the one on front controlarms inner mounting)?
I have understood that Porsche 944 uses something like this?
Justin

No, the ride height doesn't change noticably, you just change the angle of the hub in the spring plate. The 944 has an eccentric bolt for this...
Rich

I still don't get it, maybe I am just being dense. Can someone draw me a picture?