So you don't think a 50% increase in HP has anything to do with the speed of the car.You did not add 50% more weight. Do the math.I am sure that the chassis builders have improved the cars and the drivers have improved as well.Why was F500 community in an uproar over one certain chassis year before last?Why have they gone from no suspension with limited adjustability to some suspension and adjustability.I call that rules creap but maybe that is not the proper term.