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Old 11-14-2011, 08:22 AM   #1
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Default Adding shims to c-hubs and uprights- purpose?

So I was going through some pro driver setup and trying to copy their setups. I noticed that many call out for different shims on top of the c-hubs and rear uprights.

What do these do? I only ask cause I can't get as many shims on them as they are calling out for.

For example, I am running an Xray T3'11 and one of Paul's setup sheets calls for 2mm shims on the fron c-hub and 5mm shims in the rear. If I were to do that the camber link would hit the wheels.

So I went with less shims. What does adding shims to the front c-hub and rear upright do?
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Old 11-14-2011, 09:33 AM   #2
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changing the height of the balls affects roll-centre geometry
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Old 11-14-2011, 09:58 AM   #3
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Quote:
Originally Posted by Mera'din View Post
So I was going through some pro driver setup and trying to copy their setups. I noticed that many call out for different shims on top of the c-hubs and rear uprights.

What do these do? I only ask cause I can't get as many shims on them as they are calling out for.

For example, I am running an Xray T3'11 and one of Paul's setup sheets calls for 2mm shims on the fron c-hub and 5mm shims in the rear. If I were to do that the camber link would hit the wheels.

So I went with less shims. What does adding shims to the front c-hub and rear upright do?
if i'm not mistaken, he's (paul) also using the ball cups instead of the screws, in the rear upright and front c hub, which is how you can get the 5mm spacer under the rims. I too have a '11 and can only get 4mm unde the rear rim, but i am going to convert it over to a '12, which has converted over to the ball cups. hope that helps
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Old 11-14-2011, 01:29 PM   #4
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FYI lots of the team setups also don't mention that they have the upper clamps milled 1mm or that the outside uprights are also milled 1mm sometimes.

They also use the ball studs but in combination with the open ended ball links instead of the cups.
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