Originally Posted by rai
Ran through all posts but cant seem to find the answer so apologies for the repetition (if it was discussed before). I ran through the setups on petitrc and found setups on low-medium grip track. What are the purpose of adding shims on the rear bulkhead such as 2mm and 1mm shims on the rear hub? Does it improve handling? Havent tried it yet but no harm to ask first
Does it implies on the WX chassis too?
from my humble point of view: shims on the rear bulkhead or on the rear outer hub, affect the camber change on the rear. the more the inner link is downward compared to the outer mount, the more camber change is made when forces are applied. also a shorter camber link gives more rapid camber change in general.
most of the guys run it like ronald nowadays with 2mm on the inside and 0.5mm on the outside with a short link.
in general my opionion is that the front camber links should be as closely as posible to being level. and the rear ones you want the inside mount to be roughly 0.5mm lower than the outside mounting position to give "perfect" camber change.
addition: if you increase both shims at both ends equally you will raise the "instant rollcenter" given you slightly more grip normally. (also depending on track conditions etc).