I had more than 40-50 passes on the stock clutch, and numerous street races. My leaves were anywhere from 4700-6200 sometimes as high as 6500 on the radials and slipping the clutch very hard to leave. I ended up having an issue with the clutch sticking to the floor. This is a known issue with the Corvette clutch. Even folks who never drive their cars hard have the same issue. GM replaced my clutch under warranty. It actually wasn't all that worn. But, rather than have another issue, and possibly raising a red flag over a bunch of clutch repalcements (some folks have had 3 replacements to get the clutch issue resolved). I simply switched over to ET Streets. I leave the line at just below the redline (6600) on the ET Streets. Much less wear on the clutch, alos much less heat in the clutch (it doesn't stink after a pass). I counted the timeslips I had sitting on my desk the other day and had about 86 timeslips on top of my desk. I have had at least 40-50 since the clutch change. Other than that I have had no mechanical issues with the car related to racing. I had a headlight motor break... That is the only issue other than the clutch I have had so far... One thing with the ET Streets, the stock flywheel doesn't have enough mass, and the stock gear isn't deep enough. If I set it up so the car doesn't spin, the car runs 11.80s. If I have fairly high rear air pressure in the ET Streets, and the the car spins for 10-20 feet, I drop about .2 seconds as the car doesn't bog leaving... This is one of the issues I see with magazine tests. If you simply leave at low RPM, while the Z06 has decent torque, its no where near the Viper. The Viper will just motor on away with gobs of torque. The secret to a good leave in a Z06 is to keep the revs up the powerband. Doing so will drop the ETs considerably....
FYI... My car weighs 3021 lbs with fuel, and me out of the car. With me in the car, helmet, etc... I am right around 32050 lbs.. or less.