Hey guys, I'm new to owning a Jet boat and really enjoying everything. I have a question about the impeller I should run. Right now I have a 21' Ultra with a marine power 454 that puts out about 330hp. I'm not looking to drag but right now the boat runs 50mph at 4900rpm. I'm looking to get a few MPH more out of the thing without killing the possibility of pulling skiers, and hopefully not making it drink too much more fuel ! I'm not too sure what impeller it's running now, I'd guess a B or C from the chart that the pump came with when I compare the hp/rpm I'm running. Thanks for any help!!!
Dennis