That's why I disagree that the hp doesn't make a difference. I believe it does. What did that engine produce at 2200 if it made a peak of 1300? 350? More? That would be TOUGH to hold back with brakes, generate HUGE amounts of heat in the calipers and boil the fluid. That's where the pedal went. You cannot compress brake fluid vapor. All speculation of course. I'm sure we'll never know.