[cstreit]

Chris,

Your perfect ride height for a race car is really dependant on several things... Your optimum suspension angles, spring rates, and right balance.

You MUST understand your spring rates and what the suspension does under full "normal" compression. Placing a zip-tie over the shock tower, then driving a few laps, and seeing where the zip tie ends up is a good way to get an initial measurement. I start there.

Ride height in a track car should really be set based on where you want your suspension angles. For example, I've got a somewhat customized suspension. During the travel your geometry changes. You want your OPTIMAL geometry to be reached when you are under cornering load (when grip and angles are MOST important). For example, once your suspension angles get "below level" the geometry can start changing in a sub-optimal manner. I set my rear ride height so under full corner compression the suspension swing goes just below level.

So lets say under a good corner your rear compresses about 2 inches. You then know how much your rear will pivot. Make sure that the center of your normal travel has the suspension angles approximately flat.

The front is then set at rest based on where I want my balance, say 60/40. That gives you the rake as well.

This gives you a good starting point for a good racecar setup.