supergenius74 said:Ok got some numbers this past week, at 7000 RPM with a 22p chopper and my prop shaft about even with the bottom of the boat, 13.25" of setback and a 2.4 BP EFI 240 hp I hit 68.5 mph on GPS with me (240 lbs) my wife (160 lbs) my dog (12 lbs) an anchor (15 lbs) and a 1/2 tank of gas (100 lbs). Removing the foam not only gained me 1.5 mph but also did bring the bow up abit so the boat rides better with less trim. It also planes off better I think and I still need a little to much trim to the bow to loosen up, it's better but I just think my engine is a bit to light. I don't plan to add any more setback or lift to the engine, the transom is under enough strain now. I also believe 70 will not be a problem with just me in the boat. I do not regret pulling out the foam, it helped performance but I also think it will give me more room up front, I plan on mounting a net that can hold stuff and carpeting the whole area. -shane
Supergenius, try using a 25" 4 blade Powertech. My Starflite can spin it at 6100-6300 depending on jack plate height, I haven't used a gps yet to get the best height and rpm. Anyway, I started ripping out my foam. So far I've only opened it up and removed about have a foot or so. It's all dry so far, the boat was never left in the water so it may be all dry, anyway I could use the space.