Props and the power behind it or 90 V 115

Realgun

Commander
Joined
Jul 31, 2003
Messages
2,484
Dang it JB I wanted to answer this.<br /><br />Basically from what I can tell you will gain a bit of MPH due to the turn of a biger pitch prop.<br /><br />I have an 85 now and if I was to get a 115 I can gain pitch in prop size from a 15 to a 19. Same Diameter.<br /><br />Theoretically I can go 35 actual is 32 and thats about right as I get a 9% prop slip @WOT 5000 RPM.<br /><br />Real prop HP is actually about 65 here due to altutude and Force is a weak motor and HP is not measured at prop like it should have been. <br />In calculation the Speed with a 90 is 35 actual and 39 theoretical.<br />If I was able to get a 19 pitch prop to turn 5000 rpm I cam get to 43 mph Thoeretical is 47 mph.<br /><br />BTW this is @ 5000 Ft altitude for my speeds.<br /><br />A Verado is actually pretty interseting, you can take all the test boats to a very high lake and the Verado powered boat will run circles around the other boats. The Verado will not lose power due to altitude. To bad they don't make them in a 90-115 HP.
 

walleyehed

Admiral
Joined
Jun 29, 2003
Messages
6,767
Re: Props and the power behind it or 90 V 115

Realgun, please excuse me if I missed the question in your post, but....what is the question????? :)
 

Boatin Bob

Lieutenant Commander
Joined
Sep 24, 2001
Messages
1,858
Re: Props and the power behind it or 90 V 115

Hey..this is like the old Johhny Carson show...I hear the answer but what was the question????
 

Realgun

Commander
Joined
Jul 31, 2003
Messages
2,484
Re: Props and the power behind it or 90 V 115

IT was a question about the topic a 90hp vs a 115hp same boat.
 
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