Shims under the T-Bar

[Big Jimmy G]

Hi guys,

A quick question regarding having shims under the t-bar balls. I know that having some under both raises the rear roll centre and can give some extra rear grip, but I have been reading some set-ups that have different numbers under the front and rear balls.

How does inclining the t-bar affect the handling (I am assuming that it will....) Most have some under the front and none under the rear. Does this have the same effect as anti-squat on a touring car?

Help!

James

[tomlau]

yeah your right. shims under the front give anti squat effect, under the rear you get pro squat. generally i think you only run them under the front

[phil]

Just reading my touring car manual, it says that if you have shims under the back of the wishbone you increase the anti squat. Not at the front.

Phil

[Big Jimmy G]

As I thought. So, how does this affect the handling? Never really got my mind around it on the touring cars.....

James

[PDW]

If the T-bar is tipped up by shims under the front ball, you lose a bit of steering but the car rides any bumps a bit better. Lower the front ball and you get a bit more steering - but it is not as predictable to drive.

As a general rule, run the T-bar level. Remember that this is checked when the screws are down at the front on Associated-type designs. This 'shimming' doesn't apply for Corally and Calandra as their designs are different. Post to their specific car threads on here if you want to know about them.