72bluNblu said

Wheel alignment numbers are constantly changing as the suspension travels up and down. The alignment you have set is called the static alignment. But the wheels travel in an arc as they move up and down because the control arms are a constant length.

How those alignment numbers change depend on your suspension geometry and are called the camber and caster curves. Toe change through the travel arc is typically called bump steer.

Radials usually perform better if the camber becomes more negative as the suspension is compressed, the loaded wheel tips in at the top to counter the movement caused by car pushing it outward, so the tire patch stays planted.

When the control arms are close to parallel at ride height they’re at the middle of the travel arc which means under compression the camber becomes more negative, giving better handling.

This article is about the FMJ spindles, but it talks about the suspension geometry and lists actual number for the curves. The posted number are actually for a car lowered about 1”, it’s noted on the pictures but it’s easy to miss.

https://www.hotrod.com/articles/mopp-0503-swapping-a-and-b-disc-brake-spindles/


Uh yeah that’s wrong. With the wheels off the ground the suspension is at full extension, which tips the tops of the wheel out. Which is positive camber, not negative. Again you can see those numbers in the above article.

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