89 Stingray, 502 28 Bravo1 83 mph

mid 70's in a 1990 25 ft convinvor gtx aprox. 500 hp.
I ran by a friend that his gps said 72 mph.
Need a bigger faster boat !!!

76.7 on GPS
33' Scarab AVS w/ twin 502 MPIs
Bone stock

108.4 26' American Offshore 588" tall deck with all the goodies inside, 1:36 BrvoI with 32 Lab 4-blade BravoI prop @5900RPMs. I know its got more, just ran out of room.

73 -29 fever hp500efi
110-dcb mach 22 hp500-megablower&1.36 short imco 30lab bravo4
195 at daytona in one of my historical winston stock cars

72.9 in my Sonic 42ss Trip 502 carbs, 2 people 1/4 tank in October (cool dense air).

109.7 32' Vicious cat twin 300 maxes w/ 14.50 x 34 3 blades boat weighs 4119 pd's no fuel!!

63.9 89 Formula 272 with 330's, 23P Mirage Plus, just me and 1/2 tank(60 gals).

132mph 2000 Thundercat. Hey the lake is frozen.

Good question. Remember a few things. My almost 700 hp was 683 @ 5684 @ the crank (motor). I am turning the motor about 5400 r's. That is 669 @ the crank. So prop hp is about 634. 700 - 634 = 66 hp / 15 = 4.4 mph. This 89.7 + 4.4 = 94. Still a long way to 100 mph. Also consider the cabin weight. Some what more than a AO or Elim. The extra weight is in the nose. My boat weighs about 4700 lbs. wet. The dyno room is not like the engine bay. More heat and humidity.
My buddy's HTM SS w/385 hp is running 73 on GPS. He also has more nose weight than most cats. Seems like their should be more speed. When you start looking at the differences??? I'm not too worried about it. I bought the HTM cause I wanted a cat and also wanted to sleep in it every weekend for 6 months out of the year. This boat is an easy 10 mph faster than my old v hull I had and it had more hp.