Thanks again for all of the replies. The prop use for the test run was a 4 blade 21p bravo stainless. I am planning to drop to a 3 blade so am not sure how may extra rpms will be gained from that end. Islandtrader if your motor is a 383 stroker also it would make sense that my tsunami is probably a little heavier and would have to be a 19P. The 17P Mirage seems to be pretty common also, but thinking the 50 extra hp would put me higher in rpms pushing the same prop.
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