Alignment Problem

[der Mond]

A local mechanic I trust is not able to get my ’87 into Porsche recommended normal alignment specs, let alone what a trusted source suggested some time back:
Front camber - 1/2 degree neg.
Front toe - zero
Front caster - as close to 6 degrees as you can get

Rear camber - 1 degree neg.
Rear toe - zero

I replaced front wheel bearings, ball joints, tie rods (turbo), sway bar bushings and Bilstein HD strut inserts into the Boge struts. Replaced rear shocks, sway bar bushings and spring plate bushings (Weltmeister Neatrix) and reset ride height by indexing torsion bars and tweaking the spring plate eccentrics. He says caster is too low in front, the right side is worse, and rear toe is 5/16” off resulting in a pull to the right. The car drove well until we reset ride height, but it was too high after replacing the shocks. We used the ground-to-fender lip method, 25.5” front and 25” rear. Any ideas of what to try next would be appreciated.

[911s55]

Did you check your specs at torsion bar to wheel centers with your equivelant weight in the car, fenders and or whole body could be misleading, and did you install a bumpsteer kit

[911nut]

If the mechanic is having trouble getting the toe set in the rear the solution is to slightly elongate the slots toward the rear of the car at the rear of the spring plates where the bananna arm connects.

As for measuring ride height, take some paint and put a dot on the center of the torsion bar covers at the front and rear. Measure from the floor up to the dot with your weight in the drivers seat and the maximum amount of gas that like to keep on board (I like 1/2 of a tank).

As for the front I'm not sure why the mechanic can't set the caster. Usually a bent strut results in a negative camber setting that can't be corrected.

As for settings I enjoyed the following set-up on my SC:
Front
Camber - 1/16 "
Caster 5 degrees
Toe -1.0 degrees
Rear
Toe - 1/8"
Camber - 1.5 degrees

Rear camber should always be more than front.