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  1. #1
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    Is there a chart for the efficiency of a pump? Like most efficiant @ "X" rpm. Before more HP required spikes. You know, Like a GREEN jet. HaHa.

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  3. #2
    Senior Member jetboatperformance's Avatar
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    Just a suggestion here Baja , maybe try to re phrase this question , what are you wanting to know or accomplish ? eg are you wanting to lower your WOT for "fuel economy" ?

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    Leaning towards economy. Kinda like what is the point of diminishing returns.? Or is it just a typical impeller curve. I may be reading too much into this. Is there a sweetspot for pump rpms or just plain progressive curve. Kinda like why does a pump suddenly come way more alive with a not that much increase in rpm?
    Last edited by BAJA JA; 01-07-2012 at 03:15 PM.

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  6. #4
    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by BAJA JA View Post
    Leaning towards economy. Kinda like what is the point of diminishing returns.? Or is it just a typical impeller curve. I may be reading too much into this. Is there a sweetspot for pump rpms or just plain progressive curve. Kinda like why does a pump suddenly come way more alive with a not that much increase in rpm?
    So try to determine or consider where your engine makes its power and torque , what boat you have and what its intended use is

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