Quote:
Originally Posted by Superman
It has been my understanding that all four wheels should be square when the car is going down the road. Further, it has been my understanding that road forces cause the front wheels to move outward and engine/transmission forces cause the rear wheels to pull inward.....and that therefore there should be front toe-in and rear toe-out.
And yet, the Porsche chassis guys I trust the most suggest toe-in for both axles. Often more in the rear the front!
'Splain this to me.
Also....what alignment specs do you recommend for a mostly street driven 911 with 22/29 torsion bars and Carrera sways? I'm thinking 1 degree front camber and 1.5 back.
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Front: road forces push the tire to toe out, directional stability goes down w/ toe out, spec is 0° pressed, a bar is used to simulate road force so that there is 0 static toe, I prefer this, but some will want a small amount of toe in for increased straight line stability at the expense of turning
camber spec is 0°+/-10', I like more for better cornering, -1° to -1°30' works well, the more camber the more toe chage w/ suspension travel, bump steer is a concern w/o compensation
In back spec is 10'+/-10' of toe in, you need toe in here because as at the front road forces try to sply the wheels, toe in provides braking stability, less toe in imparts less braking stability, too much is a drag, so use 0 to 10' of toe in depending on what you like for braking.
camber spec is -1°+/-10' as w/ the front more helps cornering up to -2°30' works well