pinion angle

[harrythor]

Hi. Need info about pinion angle - race.I have 1969 Camaro and I use Cal Track system and split mono leafs from Cal Track.

Harry

[1randy]

3-4 degrees will get you started, then track tuning

[harrythor]

Hi and thanks. I was measure and the trans is 0,7 degree drive shaft is 3,3 degree and pinion is 1,7 degree.

harry

[SSRSBOB]

4-speed trans will require more pinion angle.

Bob

[harrythor]

Hi. It is a auto trans TH 400. Should I get the pinion up or down ?

[acelr8]

Depends on if "0" is in between the 3.3 and the 1.7.If it is the pinion angle is 5,if not 1.6. 5 is fine,if 1.7 pinion down.Backup and look as I have seen several cars with positive pinion angle on the rear.The driveshaft to the pinion should be down(shaped like a V).The trans to the driveshaft should be closer to "0" for a race only app.Although this will shorten ujoint life.Jeff

[SSRSBOB]

Go to Sears and buy an angle finder. It will stick to the flat spot on the rear housing and tell you what the angle is in degrees. All of the big time chassis builders do this all the time. Phil Mondella, Kenny Kier, etc.

You want at least 2-3 degrees with an automatic. The yoke wants to point towards the ground, this helps to plant the tires upon throttle.

Bob

[PaulK]

At least 2-3 degrees? Then what is the maximum? In other words, what is the acceptable range?

[COPO PETE]

I would go 4 degrees on the auto and 6 or 7 on a 4 speed.
Peter