Adding power is one thing. We’ve all heard about crazy engine swaps, from Hayabusa powerplants in a Smart car to what we have here. The horsepower-to-weight increase in the case of this specific ATV is rather incredible: An original Quadzilla, at around 51 hp and 400 pounds, rings in at about 7.8 pounds/horsepower. Fitch’s SuperQuad, at around 500 pounds, only has to carry 3.5 pound/horsepower. Mad, mad numbers for a mad, mad machine.