Me and phil hit 78.4 with mine in april of 05 on a 70 degree day in saltwater, i have added some etop headers and labed the props since then so it should be a little better, but i also added some stereo stuff, so who knows :D

1992 TRS drives 500hp carbs boucing around 70 in fresh water on a speedo

mine is a 35 topgun with hp500efis cover girl cabin i run 76/77 5300 rpm 24 lab finish maximus 5 blades its never enough speed might have to whipple it.....