I am running a 2005 20' Regal bowrider powered by a 350 Mag MPI with a Bravo One 1.5 outdrive turning a 14x19 Vengeance SS prop. The suggested WOT range is 4800-5200 and I get 52 mph at 4900 rpm under normal load - 4 persons plus gear. I know I fall in the range but there is room for...