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Join Date: Oct 2010
Location: San Martin, CA
Posts: 3,680
Originally Posted by Bill Verburg View Post
My bad, the raised spindle neither changes the cg nor changes the control arm angle in and of itself For the CG to change the car ride height must changed. The point of raising the spindle is bump steer control when the ride height is lowered. When the car is lowered it also lowers the cg, and at the same time lowers the inner end of the arm, this lowers the IC and RC


You are still missing it. The main point of raising the spindles is to raise the roll center. How? When you raise the spindles, what has to happen to the control arm outer end? It gets closer to ground. So, whatever the ride height is set to, the roll center is higher than if the spindles were not raised.

Raising the spindles makes the bump steer situation worse which is why the bump steer kits extend the attachment point for the tie rods down to better match the curve the A-arms travel.
Scott Winders
Old 05-31-2017, 01:53 PM
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