Ok there is a lot of prop talk going right now. So what is your thoughts about 3 blade or 4 blade. Personally I have 2004 22v with the PCM Zr6 390 hp and a walters trans not surre the ratio? Most of time is spent surfing 10 mph about 2.5k to 3k rpm with 2k of ballast. Any recomendations on props?
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The guys at Acme can take all of your information and make a recommendation. I would not pretend to know more than they do.
There used to be limitations on 3 blade props because they were so hard to balance perfectly. Now that we have CNC technology, that is not an issue. I still generally see 3 blade for direct drives and 4 for V-drives, but I think that is mostly a carryover from the old days, and probably is not based in hard science.
I think if your V-drive is blue, then you have a gear reduction tranny, which we almost all have.Be excellent to one another. -
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Most direct drives have a 1:1 gear ratio, thus the 3-blade with a smaller pitch(10-12 inches). Most V drives have a 1:1.5 gear reduction with a 4-blade that has greater pitch(14-16 inches).
Gear ration will mostly determine if you need a 3 or 4 blade. Other than that, CNC has made both equal in performance.Comment
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