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Originally Posted by PCC
Les,
Are you a Jag Designer from a past life????
Very informative - You'll be saying that you have 51% pome in you 
Is it right that with the Jag shims, you can only alter the alignment by reversing the shims from one side to another?
I was told this when getting the new tyres on. Like most things I just nodded and asked if they had a VB in the fridge  |
Pete, I guess you are talking about the caster shims on either side of the top ball joint.
It is somewhat true that is the only adjustment but only with the top arms you have.
To try to explain.... The series 11 top arms each have an offset of 2.1" (5.3cm). if you drew a line thru the center of the ball joint to the inner pivot shaft at 90 degrees to the pivot shaft you would have an equal amount of pivot shaft to the front of that line as there is to the rear of the pivot arm. However, moving the shims allows a variation of that point.
However, the series one upper arms are handed. The rear one has an offset of 1.75" whilst the front one has an offset of 2.38" so a similar line drawn thru the ball joint would be offset on the pivot shaft by the difference of .35" or .28" depending on what arm is installed where.
Now, if you swop out your series 11 arms for series 1 then you have a much larger range of caster angle because of that offset and you still have the shims. Note, you cannot use a series1 and a series 11 arm together....that's a no no for sure.
Is that clear Pete?