This world can't promise you anything.

Howvwer, most little boats typically pick up about 6mph...some a little more.

That said, my experience with people using this are usually starting out with mid 60 to upper 60mph boats, with most being high 60's to 70mph before bolting them on.

So....I guess you'll see on a 60mph boat.

I can tell you this, the boat I strapped this on was very good with fuel mileage....seems even better with the SS. It went on a 20+mile trip and used less fuel than it normally does.

Anyway, you'll see some sort of gains...I'm sure.