I installed the Spohn TA, and with the suspension unloaded I had 5* pinion angle and 5* ds angle giving me the 0* true pinion angle just like stock. With the suspension loaded I got one degree for each, giving me 0* true pinion angle as well. My question is what is the best angle to have pinion and ds at to get me the -1* or -2* true pinion angle I need. I'm assuming I want to keep things as close 0 as possible, but to what extent? Thanks!!

 

I need help with this today, because I'm going to the track tonight. I want to make sure I have everything dialed in right.

 

You adjust it with the suspension fully loaded. You should follow Steve Spohn's recommendations... -2deg for stock and bolt-on cars, up to -4deg for a major power adder. -4deg is for "track only"

 

The instructions don't give a recomendation for what the pinion angle and ds angle should be set at to achieve the -1deg or -2deg true pinion angle. It just says that you subtract the pinion angle from the ds angle to get true pinion angle. So I could set my pinion angle to 15deg and my ds angle to 14deg and still get the -1deg true pinion angle, however I don't think it would be good to have 14deg and 15deg on the ds and pinion. So what kinda angle am I aimming for here? 2deg pinion and 1deg ds, that would still get me the -1deg true pinion angle?

 

The two angles are not adjustable separately, by adjusting your TA your cause the differential to rotate up or down changing the difference between the DS and differential angles.

 

Gotcha!! After reading your post and re-reading the instructions for the TA it makes sense now. Thank you very much!! The way I read it, it seemed like you had to adjust the 2 seperately.