Top end is nice, but I don't go there that often. I'm wondering what speed other boats see at 3,800 RPM's? I'm running 62 (GPS) on a 38 and 600's.

35 with 502's-400hp...@4000 about 60.

5000 is 74-75...light fuel

I must be missing something. 42' HP 500's 30p Bravo I's = 60mph at 4300rpm. Any others?

35 with 500 HPs, 27" Hydros ... 55 @ 3500

02 35 fountain with 575's stepped on runs 65 ish at on gps at 3800-3900 rpm spinnin 5 blade hydros.. 5100 runs 90,, at 5300 about 94/ 95... at 5650 i dont know yet.. should be around98 99 i been told

pic#1

Nice readings!!!!!! What boat size / power are you running.

have ui compared speedo to gps??

what wheels and gears?

what yr boat and what props

?

I havent used a gps yet, but I think I have 1.36 gears. 540s in a 1991 32 fever. The speedo says 78-79@4300-4400rpms. 27p hydros. I am going to try 25s or something.