It seems to me that its more like barely doable. If it was easily doable would mean that 130 might also be doable which its obviously not. If you can get over 125 it wont be far enough to make it worth taking the time to shift up to 4th and then back down to 3rd before the corner
It's still doable, which you believed it couldn't. That's the 2nd assumption you've made without much reasoning about this track.
And it still is easily doable, though maybe I should wrote 500whp+. We've had some other high horsepower cars knock out 125Mph like nothing, such as the Ford GTTT that was lost here a few weeks back, that put down a 1:25, which is amazing for a beginner & 1,200whp car.
The Viper in the video is bone stock, power wise, which means it roughly throws down 450whp to around 500whp for the newest ones. Add in another 50 through exhaust, cams, headers, etc. & I'm pretty positive 130Mph is attainable speed.
Your right I have never been there. All I can do is try and judge it by the picture. My point remains the same. The Miata is better geared for that track than the Z06. The Miata will use 4-5 quicker gears than the Z06's 3 long gears.
Again, making assumptions when you have never been here. Judging by the picture won't do you any good, as the picture doesn't let anyone see the amount of elevation changes that play a role in this track, that in turn, show how difficult some of the turns are.
Stock for stock, I'm positive the Z06 is a better geared car for this track, seeing as it will make the necessary power in every gear. The instructor is pretty definite proof because even the turbo Miatas at this track have a difficult time matching it.
Otherwise, (besides Eric's valid point) it doesn't matter; nearly everyone runs different setups, so unless you care to make the assumption of who's running what, you don't really have an argument there.