Hi, my tournament 22 is new- well to me anyway. It's a 1982 and has a mercruiser 485 engine. Compression is right around 155 on each cylinder. My concern is that with only me aboard I can achieve 4200 rpm's, which is on the low side (4200-4600) at WOT. The prop is a 19" aluminum. Any recommendations on a prop that might get me up into the higher range of the rpm level. I do have a Michigan Wheel Rapture with a 19" pitch also, but with it's different cupping etc. might it give me a couple 3 or 4 hundred more rpm's ? Thanks.