Quote:
Originally Posted by spud69
I seem to remember this has raised it's head a few times previously and yes technically you're right to bring it up again. You can turn the offset mushroom to the rear to move the steering angle forward a bit to influence the self centering. As you know it doesn't actually move the top pivot point but in my experience of the cars i've helped to set up it does help - the reason why offset mushroom started to be used. Getting the bump steer and toe fine tuned will have the best effect over stability.
I dont claim to be an expert just have some experience to use and pass on.
Cheers.......Andy
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The mushroom should be orientated away from the engine.
The mushroom is not meant to be used to overcome the lack of caster. The mushroom takes into account the upright doesn't pivot about its centre line in the donor vehicle. Martin Keenan devised the mushroom to overcome this problem.
The lack of caster is a design flaw in my view and the design should have been corrected years ago or at least a sticky put in place so new builders would know to build in extra caster as they built their chassis. Rotating the mushroom and adding undersirable toe out to get it to self centre is just bodging round the issue.
5 degrees should be considered a minimum but some people arn't getting anywhere near as much.