Originally Posted by
JCarr
While we are talking about roll centers...
This is something I have never messed with, but have seen a lot of talk about it lately. My 416 is a little too planted in the rear and I saw in here that there should be .5mm shims under the rear susp. holders. Mine does not have them so I'm going to add them to see if that gets me where I need to be. My question though is what is the difference between putting the shims under the mounts vs. putting the shims under the camber links? Isn't that also changing the RC?
When you put shims under your arms you are raising the roll center, and when you put shims under your camber links you are lowering the roll center...
To lower the roll center you would raise the inner camber link position and lower the front arm. You could also lower the outside camber link as well.
Lower
• More on-throttle steering.
• Car is less responsive.
• More weight transfer at front of car.
• Better on smooth, high grip tracks with long fast corners.
To raise the roll center you would lower the inner camber link and raise the front arm. You could also raise the outside camber link as well.
Higher
• Less on-throttle steering.
• Car is more responsive.
• Less weight transfer at front of car.
• Use in high grip conditions to avoid traction rolling.
• Use on tracks with quick direction changes (chicanes).