Why do you want more horsepower?

[scoflaw]

If the larger engine is turning less rpm than the smaller one to travel at the same speed, how do you see that as less efficient ?

 

[dingbat]

Given that the higher HP engine will be spinning a higher pitch propeller, then for a given boat speed, that engine will be turning slower, and that will push it even further DOWN the torque curve. That will make that engine less efficient.. Therefore needing more throttle to generate the same power. More throttle equals more fuel going down the hole, for the same boat speed. Quod Erat Demonstrandum.

Chris......

Horse power is (torque x Rpm)/5252

Whatever combination of torque and rpm you use to generate X horsepower, the amount of work being done is the same.

 

[Scott Danforth]

Horsepower is how fast you hit the dock........ torque is how far you took the dock with you.