I had the VDC turned off for all my runs. I learned that the hard way from owning a 350Z with TCS
I think I coulda run better times if i had taken the time to let the car cool off a bit between runs. For my last 6 runs or so I had the car going one run after another with no wait in between. I don't plan on going again until this fall when it cools off a bit.. Wish I had come earlier when the temps were cooler.