so when I got this boat, the guy said it will run 90 mph.... I walked around back and looked at the prop...24p hydro, with out say'n a word I knew that that was BS...as you can see, at 5000 rpm, with 15% SLIP...64 MPH...GPS...SO KNOWING SOME OF THE FACTS, 24P PROP...1.50 gear, I took a guess, 15%...(might be less) and figuring 5000 rpm, ... nets you 64 mph,... far cry from 90 mph ...lol... unless he took the twin turbos off or something... not gonna happen...

so, my first guess is the prop is too small and it should be able to spin aat least a 26 p...


  1. Propeller Pitch 26
    Calculate
  2. Gear Ratio 1.50
    Calculate
  3. Engine RPM 5000
    Calculate
  4. Actual Speed (MPH) 82
    Calculate
  5. Propeller Slip 0%


so as you can see...to get to 82 mph with this boat.. it would be at 0% slip

at 15% slip, you would be at 70 mph...10% slip would net 74 mph...

so in theory... and facts.. water test is needed... but were bench racing here so lets see what would happen if it could spin a 28p



  1. Propeller Pitch 28
    Calculate
  2. Gear Ratio 1.50
    Calculate
  3. Engine RPM 5000
    Calculate
  4. Actual Speed (MPH) 75
    Calculate
  5. Propeller Slip 15%..


so now we are at 75 mph , that's with 15% slip, you could get to 80mph, with 10 % slip, for that to happen the wetted surface would have to be at a foot...in othe words, the boat would be fly'n on the tabs,... so not to realistic