Hi everyone!
Pretty new member here but mechanic from trade for many years already. I am doing restoration work on a client's 1970 911S, his suspension is lowered and I was having question regarding toe correction for the rear.
I haven't looked at the actual readings of camber and toe either front or rear as the vehicle is being stripped for rust repairs, respray and suspension overhaul.
I did measure the vehicle height front rear and put it on scale to get an idea if body was twisted or still in specs.
The vehicle sits about 50mm lower in the front and 52mm lower in the rear. I had a difference of about 20lbs from left to right on front axle and pretty much the same but "reversed" in the rear (i.e. I would have to increase the height on the 2 opposite corners that were showing less weight and my X and side to side would be pretty perfect).
Anyway by test driving the vehicle before starting the tear down I noticed the handling is very poor on this poor old lady. The client wants to retain that low height (he even wanted the front lowered more but I strongly advised against it and he got my point).
I will be getting him a bumpsteer kit for the front as the steering was behaving badly on bumps and the angle of tie rods is really not optimal. On the plus side he does already have the turbo tie rods. So this end of the vehicle is pretty much "dealt" with.
My issue lies with the rear end of the car, I know by lowering suspension it does gain negative camber but also increases a lot of positive (toe-in) toe. Eccentrics have their limitations as to the correction it offers. I felt the rear of the vehicle must have significant toe-in as the rear was feeling loose and wobbly while cruising on the highway. (I had a similar issue with a 86 930 couple years ago, but readjusting ride height closer to spec improved the rear behaviour a lot).
Don't get me wrong I'm aware tires have a huge impact also and I gotta say the Yokohamas on the car got soft sidewalls that are not helping.
So long story, but are there solutions that exists for lowered early 911s in order to be able to bring back toe much closer to specs in the rear?
Bear with me a little english is not my first language!
Claude
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