six barrel

I remember talking with someone when the 400hp outboard boat engines came out. He wanted to know economy if he upgraded from 4 - 350hp engines to 4 - 400hp engines. Explained old rule of thumb was 10% of hp at wide open. He had a meltdown. 160 gallons per hour...his boat only has 400 gallons. Had to put it in perspective for him. That is 1600hp at WIDE OPEN for hours at a time. Who does that? What country does he wish to be in?