Posts: 742
Location: Grand Rapids MN | Thanks Steve for responding. I've talked props with you about a year ago, which was helpful, and discussed which direction to go. Right now I have a Powertech RXB4-17 running 6000-6100 average load at 39-40mph. Decent hole shot and provides some lift. I've had Sola 3 blades in 19, 17, 15 pitches. 19 I knew was to high but still got 45@6000 bad hole shot and of course porpoise issues if not trimmed right (as you illuted to); 17 I ran the most with ok hole and 41@6100; 15 had a rocket hole shot but lost 4-5mph throughout the rpm range. Also tried the 4 blade Solas in 15 pitch but over all performed same or less than 3 blade. I also have a Trophy 17 pitch that I'm testing. Seems to have slightly more stern lift at higher speeds than the Powertech and runs 37-38@6100. Prop has a little more grab but I need two more plugs for the vent holes. Still a little blow out on a hard launch. Now this prop was tested at 2 holes up on motor height. Since then I've moved the motor dowm one hole.
For some reason I did not gain rpm going from top hole up 2 but I got the benefits of less torque steer and porpoise seemed to lesson a bit. I also dropped in speed. So I went up one hole (so we're one down from top) and I lost speed again. Used to run 40.5+\- and now 39 at the highest. Nothing else changed so I don't know what happened.
If I could find a stern lifting 16 pitch SS I may improve more but these are tough to find. I've also read that these boats don't have the best performing hulls. It's a welded aluminum with 20 degree deadrise. Boats rated for 150 but models before and after had a 115 max. So I thought it would handle the stern weight.
Anyways, hope this rambling info helps. Like I said before performance isn't bad but loaded in a chop can get scary at times with how it reacts. Lightly loaded I have no worries.
Thanks again...
Edited by Targa01 8/29/2012 9:12 AM
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