[Otter74]

Sure, a car like this could run the Silver State Challenge or lap the 'Ring. It is optimized for the Texas Mile, but perfectly capable of doing either of the other two pretty well. You are always going to be traction-limited if you are doing 'Ring Laps, and the engine is not going to be taxed too hard. I imagine if you just program in some good traction control or are careful with the throttle you'd do well. Peak power output would likely be less to ensure reliability for the SSC, but again that can be done relatively easily with the engine management, probably.

As far as the braking goes, remember that brakes convert kinetic energy into thermal energy, and that kinetic energy goes up with the square of velocity. At 300mph you have to convert roughly 2 1/2 times the energy that you do at 200mph, and this becomes pretty hard on a street car, even if you only have to do it once. Plus, events like this are not exactly about what's just good enough - a chute is just smart from a safety standpoint.