Quote:
Originally Posted by chris_seven
What caster angle are you using as I suspect that the issue is the geometry.
I don't think a quick rack will help turn-in behaviour as basic geometry will not be altered.
I do like 'quick' racks but they won't improve a set up that isn't quite 'right'.
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This!
Trying to adjust a 911 without a manual and correct measuring tools is as close to impossible as you can get. Being able to adjust toe-in and out, camber, caster, and ride height and finally, corner balance means, while if done correctly, it's fairly easy to get your car to handling exactly as you like. Done incorrectly, it just won't handle well at all, and might be downright dangerous under heavy braking. My car was a hundred lbs out on corner when I got it and was a handful under slightly heavy braking. Tire wear was horrible. Now with a good corner balance and string set up, I can go to threshold braking from 100 mph with fingertips only on the wheel. Having a shop do your alignment will not be cheap, but it will be worth every penny. If you procure the tools and do it yourself you will be on track to mastering a phase of sports car ownership.
P.S. You location would help with suggestions on a good set up shop. Throwing parts, seldom fixes the problem on the first throw. Also exact set-up of your car would help armchair diagnosis. One un-mentioned possibility is your tires, brand, age, and tread wear. My car, for my driving conditions and style wears my Falken Azenis 200 tread wear , almost flat across the tire in the rear, and the front insides will show cord as the outside tread goes smooth. Tire wear patterns tell a lot about your set up. My tires last for about a year of aggressive street mountain driving.