I have 305/35/18 Nitto 555Rs. Ran between 17-20 psi. I dropped it more as the day went on. My biggest problems were:
1. My burnouts sucked. It was literally the first time I've ever done a burnout. I didn't get on the brake fast enough to keep the car still, and then it started sideways on me, so I never stayed on it long enough to bring any smoke. Heal-toeing just seems awkward as hell
2. I was trying to launch about 2700, let the clutch out slow until it caught, then pretty much dump it and ease into the gas at the same time. Every time, I pretty much bogged, rolled out slow, then took off. I assume this is why 1st never gave me any problems with traction and 2nd was the culprit after hitting my 1/2 shift pretty hard.
Everyone's times were down yesterday, despite the negative DA. The track was very cold and almost seemed slick at times. Still no excuse for my poor launching, though. Any advice is certainly appreciated. It's just gonna take some seat-time I guess..