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DSCN4512.jpg So i did some testing with some props and here is what i came up with..
@wot 4blade ss 14 1/2 x 16 apollo 46 mph fully loaded boat @ 5300 rpm
@ wot 4 blade alum. 14 1/4 x 18 48 mph fully loaded [email protected] rpm

both of these props came out of the water great.but i would like to get a little more speed. any suggestions...

20 miller openbow 5.7 vortec omc cobra outdrive..
 

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View attachment 71668 So i did some testing with some props and here is what i came up with..
@wot 4blade ss 14 1/2 x 16 apollo 46 mph fully loaded boat @ 5300 rpm
@ wot 4 blade alum. 14 1/4 x 18 48 mph fully loaded [email protected] rpm

both of these props came out of the water great.but i would like to get a little more speed. any suggestions...

20 miller openbow 5.7 vortec omc cobra outdrive..
With your motor I would go to a 14 1/4 x 21. 3 blade stainless. I will get you apx 4 mph at 4400 rpm. Should still come out of the hole good and plane fast enough.
 
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