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-   -   Is A-arm bottom square to its pivots? (http://forums.pelicanparts.com/porsche-911-technical-forum/454983-arm-bottom-square-its-pivots.html)

911st 02-02-2009 04:19 PM

Is A-arm bottom square to its pivots?
 
Is the bottom of the A arm square to the torsion bar and ball joint centers?

Dose anyone have an A arm laying around with a ball joint attached that they would measure to see if the bottom surface is square to the ball joint pivot axis and the arm hinge axis.

To do this would just lay arm on a flat surface and measure up to the center of the bushings or torsion tube and then up from the surface to the center of the ball joint.

If it is not level, would very much like to know what angle it is off by. Each one deg off would be about 3/16".

My hope is to set my front ride height to achive max neg camber in a turn.

I suspect that if with a stock suspention we lean 4 deg in a full on turn and it is 13" from the center of the car to the A-arm pivot and then 10.75" to the ball joint, I would need to set the A-arm at +1 deg for the A-arm to be level to the track in a turn and at its longest length.

Thank you in advance if you can help. I just think this stuff is fun.

Won 02-02-2009 04:28 PM

The Ball joint seat is slighly angled upwards relative to the arm base. Don't know by how much.


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