In previous threads I compared (using old GPS data) myself driving my 997TT and my GT-R on the same track (Reno-Fernley). The GT-R was 2-3 seconds faster, but there were a lot of other variables (weather, driver skill (GT-R test was a year later-- I hope I got better) etc.).
I just got back from a day at Thunderhill with Hooked on Driving. I had both cars with me.
Some pics: http://gallery.me.com/cnicholson1#100144
I am not a super hardcore track driver (let alone racer). Just a guy that enjoys DE days. My previous fast lap in 997TT was a 2:07. That was before they resurfaced the track. There is debate in the paddock as to whether new surface is faster (because smoother) or slower (because still too new and grip is still building).
Anyway, here are the results:
First session out on GT-R: tires squealing. Car felt heavy. Had to turn in later. I was sure I was slow. But I did a 2:08!! On my third session, I did a 2:05. Two seconds FASTER than my previous fastest lat in 997TT (after 12+ track days in the 997TT on that track).
Best lap in GT-R: http://www.viddler.com/explore/Cnicholson/videos/2/
After lunch, I switched to 997TT. First session, best lap 2:07. Next (last) session, I was gridded up next to a buddy who is very fast and has a very fast 993TT. We where tearing it up. I got back in to check my times and noticed that my TraqMate had come unplugged!!!! So no solid data. My friend's traqmate showed him doing 2:04s with one lap at 2:03.9. We were pretty evenly matched, but I think he is a a bit faster.
Using a bit of judgement, I am going to say that on that day, by the end of the day, I was a bit faster in the 997TT (perhaps by a second-- maybe 1.5 seconds). But: My 997TT has 700HP and hits 140MPH on main straight (versus 135 for GT-R) and I know I am getting closer to limits on 997TT.
It is amazing how easy the GT-R is to jump in and drive fast very confidently, but I still need to learn the car.
Conclusion: Stock for Stock, the 997TT HAS NO CHANCE WHATSOEVER versus a stock GT-R. GT-R versus a modded 997TT would be a driver's race.
-Chris

