Pinion Angle/Adjustable Upper Control Arms

[shotgun]

Pinion angle is somewhat less dependent on useage as it is parts used.

As you remove play from the suspension the angle is reduced.

Old soggy stock rubber bushings can run up to 5to 6 degrees of angle.

As you move threw new rubber,poly, spherical and hiems you run less and less.

Also flex in the arms come into play.

On my race car the LCA were moly with heims, the UCA were adjustible with spherical joints.

Ran 1 degree.

 

[drogg1]

Thanks guys that's what I was talking about. I'll have to read up on it more. Most of my questions I could find the answers to myself I'm just being stupidly lazy.

 

[megaladon6]

tell you the truth, i don't think you can find "THE" answer of what angle to use. as said it does depend on exactly what parts, usage, and alignment you have.
(BTW, theoretically zero angle is correct, IF the rear and trans don't shift at all, including over bumps)

 

[jrm81bu]

The last I knew you wanted the the some angle. That is supposed to cause the needle bearings in the u-joint cups to rotate. If there is no angle, they will heat up and fail. And that you wanted the same angle at the tailshaft as the pinion but not in a straight line.

 

[megaladon6]

like i said, theoretically, if there's no movement, blah blah blah

 

[Hark-dog]

heres a good education pdf from inland empire driveline, http://www.iedls.com/asp/admin/getFile. ... =28&FN=PDF -1 degree is good start for a midly modified street car, high horsepower can work with -2 to -3, anymore than that will induce driveline bind. Thgis is based on true pinion angle not just attacing a angle finder to the yoke