Whoa, this has turned into a good thread!! :ylsuper
First of all, the Z06 / Corvette handling. Those things are VERY well dialed in. I was in the passenger seat of my friend's Supra on a canyon run, and we were behind this Z06. My buddy had the horsepower to pass him, but on the tight roads there was no where to get a long enough run to spool up the turbos. The Vette was flat, like RS*R tuned 350Z flat through the corners. It was kinda amazing.
As Nathan said, it was especially fun when you come close to keeping up. That's so true. With the Z06, I think it was more like being sucked along in his draft, than truly keeping up. I wish that I had some external audio on it, because we came up over the bridge at the top of fourth. The exhaust sound for everyone else around us must have been sort of frightening. =)
It would take a very well driven 240SX to keep up with a Vette like that on the track. I get the sense that the Vette could do more easily, what you'd have to push a 240 to do. At least with an SR20, you'd have to push 20+ PSI to get into the same hp neighborhood as the Vette. My car will never see that kind of power, even if I had a suspension that could handle it.
As C-Kwik said, a streetable Supra can eat a Z06. There are few cars around that are tuned Supra fast. My buddy has one and is about to max out the stock, twin-turbo setup at around 550hp to the wheels.