I am stuck trying to figure out what I should do. I have a 20' 1994 Maxum 2000sc with a 1.8x ratio drive and a custom built 4.3 (edlebrock carb and intake, bored .030" over, Keith Black pistons, healthy roller cam, worked Vortec heads, larger SS valves, comp 918 springs, Magnum Pro rockers, ARP studs everywhere) and supporting exhaust tube, y-pipe, and Marine Power manifolds/risers. My machinist and I estimate that it is probably in the neighborhood of 320hp. Boat will primarily be a cruiser as my kids are to young to do much atm. It will also serve as a speed boat for the wife and I to play with friends that have 60-80 mph boats.
After taking her out with a full tank, a 200 lb friend (i also weigh 200), 200 lbs worth or tools/spare parts and a Highfive 21p prop, I am confident it makes power lol. 45mph if I dropped the hammer it will still put you in the seat and was on plane in less than 2 seconds. With the current H5 21p prop, I could easily blast past 6k RPM if I was willing to and was doing ~55mph at 5800-6k RPM.
The only way to keep my RPMs at ~5500 at WOT would be to more than likely swap to a 25p H5 lol or swap to a 1.47 ratio drive. What would be the better method to achieve a proper RPM threshold keeping cost out of the equation?
Thanks,
Kp
After taking her out with a full tank, a 200 lb friend (i also weigh 200), 200 lbs worth or tools/spare parts and a Highfive 21p prop, I am confident it makes power lol. 45mph if I dropped the hammer it will still put you in the seat and was on plane in less than 2 seconds. With the current H5 21p prop, I could easily blast past 6k RPM if I was willing to and was doing ~55mph at 5800-6k RPM.
The only way to keep my RPMs at ~5500 at WOT would be to more than likely swap to a 25p H5 lol or swap to a 1.47 ratio drive. What would be the better method to achieve a proper RPM threshold keeping cost out of the equation?
Thanks,
Kp