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Old     (duffymahoney)      Join Date: Sep 2008       06-20-2012, 8:48 AM Reply   
So I got a Acme 5 blade 2133- 14.00X13.50VL5B 1.125 .105 cup to test for surfing. As most of you know, I have tried all sorts of props. I have changed v-drive ratios in boats, tried new cups pitches and they never worked liked I had hoped and I hate hate hate cavitation.

Test boat. My 2005 Tige 24v. 3200 in ballast and 7 adults (I would guess 1100 pounds of people). Water wasn't super flat but not too bad.

Props tested:

1579 13.5 x 14.25 LH 1 1/8 Bore .105 CUP- 12.7 mph 3300-3400 rpms- Boat holds speed but rpms are high and it tends to cavitate with any bumps or waves. Wave is pretty clean but tends to have a slight wash every few seconds.

381 13.5 x 17.5 LH 1 1/8 Bore .105 CUP- 12.7 mph 3000-3100 rpms- Boat doesn't hold speed as well. More lead or people needs to be moved to the bow to hold speed and wake plate or taps needs to be lowered to hold speed affecting the wave. Any rough water makes holding speed worse. Wave is nice and clean.

2133- 5 blade 12.7 mph 2900-3000 rpms- Boat sounds so weird. Like a low singing roar. Gosh the best way to describe it is the boat doesn't care about the ballast. Literally could have surfed 18mph with it. It jumps to speed so fast, and the getting to speed is very smooth. It's hard to describe. Boat held speed perfectly through chop and waves. Also gas consumption was only 8 gallons in a couple hour set. So that was nice! I think 5 blades are a game changer for surf boats. Wave is nice and clean.

I did try other mphs. Same basic results but lower rpms across the board. The 381 works if you play with weight placement enough. The 5 blade didn't care were weight was and we moved weight for the best wave possible. Below are pics of the clean wave with the 5 blade and my buddy surfing.
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