[sperry]

Originally Posted by Dean

Scott's initial comment is correct, but there is more to it, and I'm not sure real time data helps for initial setup.

In addition to braking, turning the other way also raises inside temps, so a skid pad is the only real way to get cornering contact patch related tire temp info. Cold tires, run 5-10 even no under-oversteer laps. Slow to a stop quickly but with minimal braking, Check temps accross outside tires. Let tires cool. change pressure, repeat.

Given this weekend's courses, I would expect about 10-20 degree hotter or maybe more inside temps in the front on a good clean minimal understeer run. Rear I don't care about much as they get adjusted to overall car feel rather than ultimate grip at that end in most cases. A straight progression is about right to me most of the time.

Outside = X, center = X+n, inside = X+2n where n is in the 5-10 maybe 15 range. It's actually a whole lot more complicated than that, but that is a good starting place for autocross at least.

+1, this is well said. I've found on my car that when it's handling good, the temps are linear across the tire but not equal. However, at the track I try to get them as equal as possible since that's going to get me the most tire-life, and friggen race tires are expensive!