pinion angle and caltracs

[Chad E532]

I had a similar problem on my bracket wannabe stocker 77 Camaro. I talked with Travis at Cal Tracs and he told me it was due to lack or rear shock travel. He suggested having the car setup with 1.5"-2" of exposed shock shaft when the car is at rest. I had to add 2" shock extenders for my QA1 shocks to get me in the correct shaft exposed and it did take away the car "bucking" off the line. Also, I have a theory that the 1/4 turn of preload would be fine at a national event prepared track but at the local bracket tracks I am running a full turn of preload to get the car to work correctly.

Chad

[sixty8]

Travis answered my question earlier this week about the recommended pinion angle with Caltracs - "-2 ot -4 degrees down in relationship to the output shaft of the transmission not the driveshaft".

[reera]

Originally Posted by sixty8

Travis answered my question earlier this week about the recommended pinion angle with Caltracs - "-2 ot -4 degrees down in relationship to the output shaft of the transmission not the driveshaft".

Thanks to all who responded. I talked to Travis @ Calvert a couple days ago and he told me the somewhat the same thing. He said to measure the output of the transmission angle and the pinion angle and add them together. Should add up to -2 to -4 degrees. He said most transmissions are angled -1 to -2 degrees so your pinion would only need maybe -1 to -2 degrees. Got it set per his instructions. Going to give it a shot tommorrow.

Thanks again,
Ryan