I have Cobb and run either stg2+sport or stg2+agg; Was out a Sebring a couple of weeks ago on a pretty hot two day weekend 80-88 degrees morning to afternoon. Sebring's a pretty brutal track, 3.7 miles long and hard on everything in the car. The highest temp I saw was 280 on the second day, after a longer than normal session. However I do have upgraded FMIC with stock oil cooler, 50/50 coolant/water mix with one bottle of Redline water wetter.
On tracks > 3 miles, the highest temp I see are 270 even on hot days. I have yet to limp on the track, and I run pretty aggressive out there.
How do you like your carbotech pads? I just ordered a pair of 16/12 for fronts/rears? Do you mind sharing which Schroth harnesses you're using? On stock seats?