During one of my visits to Rob's place he told me that with full flaps they could develop 3000 lbs of down force at 180 mph. If you assume that the coefficient of friction for the salt is about .25 ( low end of the scale) and the rear wheels carry 3000 lb of aero down force and 2000 lbs of car weight for a total of 5000 lbs, then at 180 mph they can apply 600 hp to the salt, at 360 it is 1200 hp and at 450 it is 1500 hp. If their aero numbers are close, and I certainly believe that Eric's (Blue) numbers are probably pretty accurate, their aero load at 450 is probably going to be in the 1500 hp range which they can easily apply to the salt, so they certainly appear to be a real contender for the 500 mph speed.
One of the really neat things about their design is that they can develop 3000 lbs of down force at 180 mph which could literally be by the 1-2 mile mark! With 2600 hp on tap we might see 400 by the three!!
Can't wait!!!
Rex