[robnolimit]

Here's a quick lesson we learned, or re-learned last night. We have a local road coarse that runs 'time-attack' on tuesday nights. It's a great place to test, and a heck of a lot of fun. A frustrated group with a pretty nice 32 roadster were unhappy with its handling, and set out to fix it. - Its a good runner, and it handles well. They unhooked the rear swaybar, AND make a big change in brake bias, shutting down the rear brakes as much as possible. Next run they spun the car into some tires, and ground it down the track curb. Scuffed paint, tweeked fender tip, (slight), and a tore up lower A-arm.
Lesson 1: ONE CHANGE AT A TIME
Lesson 2: DOCUMENT YOUR CHANGES - AND THE RESULTS
Lesson 3: FEEL THE CAR OUT AT LOW SPEEDS FIRST
I know not everybody has a test track available, but you can lay out a test run area on a back road. As you run it, note your speed or rpm through different areas, check tire temps at the end of a run. We use a hand help heat gun. check the temps at the center, and each side of the tread (inside/ouside) Compare your temps. Hot in the center - too much air. Cool in the center - low pressure. Lets say temps run 122 outside, 128 center, 136 inside. - too much neg camber. This is a great tuning tool. give it a try.