Howdy,
That prop slip calculator is a great tool,
But there's really no way to determine what might be a "better" prop or correct pitch without knowing an accurate (WOT) speed (GPS), accurate RPM (from a verified tach) at that speed and the drive ratio. THEN you can use the Prop Slip calculator to determine which way to go with a prop.
dbxtr3 wrote:
I have a friend that has a 1986 Four Winns 16' Freedom it has a 3.0 GM I/O w/ alpha one 140 lower unit. It has a 3 blade 19.4 aluminium prop that he is looking to upgrade to a SS prop. It comes up on plane real quick now and cruises great about 30 mph w/5 people in the boat.
What would be some good alternative sizes for him to use for a more top speed?
Regards,