It's to reduce bump steer and to fine-tune their ackerman to the way they want it.
I run rubber - and stock shims all around. I do have 3 washers under the camber-ballstuds - makes the arms more parallel and doesn't create as much negative camber on full compression. I also have two washers under the steering link at the knuckle - kills almost all bump steer.
I'm running the 2deg block in the rear.
Originally Posted by Nitro-Boy
Why do the Factory drivers run .120-.180 of washers on the steering rack & front upright?
You're running foams correct? I know everyone told me to add shims if I wanted to try rubbers...
So in the Front you're running:
.075" & .025" Triangle
What shims are you running in the rear?
.075" & .025" Square & X?