[bobcowan]

Bailey is on target.

I use 17 street and track tires. Cold air temps are 24-26 psi. Which allows the hot tire pressures to be around 32psi. Optimal pressure and camber can only be truly determined with a tire pyrometer. I bought one off e-bay for $40.

Carefull Alignment is the key to good handeling. All the right race parts won't perform well if alignment and ride height is off. Too much toe in will really cause an understeer.

Have you checked bump steer? If your springs are soft and you have a lot of bump steer, as soon as the nose dives your toe in will be significant.

Do you have sway bars? Less front bar or more rear bar will help improve understeer.