NJ-GT

Based on the information provided by Bob, I would just rotate the strut tops again to the factory settings and just add shims to gain camber, caster and increase front track without sacrificing aero.

Shims are for sale at your local dealer. Buy the following, allows you to have anywhere from 1mm to 12mm lower control arm per side:

(2) 7mm shims
(4) 2mm shims
(4) 1mm shims

8.0 caster is good, 6.5 caster is too low. I had 9.0 degrees in my 996 GT3, and 8.8 in the RS (lowered).

TTurbine

Im going to install the shims as soon as they arrive to increase caster... they have been stranded in Europe for a while due to the Iceland volcano..

Ill rotate them back to stock and do it by just adding shims i might back off the camber a little , say maybe 2.3-2.2 negative camber since i run corsas..

and for the rear it has -2 camber , do you think i should i back it off a little to gain better rear end stability?? and reduce oversteer?

Ive been hearing mixed opinions on rear camber lately ..

Bob Rouleau

TT Neg 2.0 to Neg 2.2 is about right in the rear of your car. I tried 2.4 negative but found the inside edges wearing too fast. Odd because on the 996 GT3 2.4 negative was right on. The newer model has a different geometry it seems. More negative camber increases rear grip and DECREASES oversteer. It also prevents premature wear of the outside shoulder of your tire on the track. I settled on -2.2 in the rear of my 07 RS which gave me even tire wear on Hoosiers.

About Caster, more is better but on my car when I had 9 degrees of caster my tires rubbed on the fender liner at full lock especially when backing up.


Regards,

TTurbine

Thanks for the input Bob

Z06

I run more than 2.4 deg rear camber and have no problems with uneven tire wear and Zero problems with stability.
The not so straight... Mosport straight will find any issues with stability quickly.

Both front and rear camber were adjusted with shims, no rotating of the tops needed.