[bornmud]

I have owned this boat for a couple of months now and I am certain i need to change props. It is a 1994 davanti 235Z with a 454 mag bravo 1 outdrive 17 pitch aluminum prop. At WOT trimmed to top speed and rpm, I am running at about 5300 rpms and only going about 47 MPH. I am located in utah so we are up in elevation. I am thinking a 19P would be about right but maybe a 21??? what are your thoughts?

[mikeyt]

The change to a 19" will likely drop your rpms to a more reasonable 4850-4900 and should result in a slight improvement in your top speed. The downside will be that your holeshot wont be as good as you were used to but should still be reasonably okay.