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Jon and V Boat Conversions & Modifications
Jet Jon Build Pics ...VIDEOS LINKED!!!!!!
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<blockquote data-quote="PSG-1" data-source="post: 227550" data-attributes="member: 6937"><p>Good suggestion. I was about to suggest the same thing. A top loader grate will feed more water to the pump, to keep it from starving out and cavitating, even at 40 MPH. </p><p></p><p>Shifting more weight to the rear will also help, it will sink the pump a little lower in the water, but you may need trim tabs to offset and prevent porpoising. He did say that it ran better without a person in the bow, with the bow being up some, so that tells me that putting weight on the stern, theoretically, should work.</p><p></p><p>Also, try a "Concord" or 'swirl' impeller, rather than a straight rake profile. The swirl impellers are a little more forgiving of cavitation. </p><p></p><p>If you're running a progressive pitch impeller, such as a 13/19, you may even need to have the pitch modified, maybe to something like a 14/16. Again, this is one of those variables that you have to experiment with.</p></blockquote><p></p>
[QUOTE="PSG-1, post: 227550, member: 6937"] Good suggestion. I was about to suggest the same thing. A top loader grate will feed more water to the pump, to keep it from starving out and cavitating, even at 40 MPH. Shifting more weight to the rear will also help, it will sink the pump a little lower in the water, but you may need trim tabs to offset and prevent porpoising. He did say that it ran better without a person in the bow, with the bow being up some, so that tells me that putting weight on the stern, theoretically, should work. Also, try a "Concord" or 'swirl' impeller, rather than a straight rake profile. The swirl impellers are a little more forgiving of cavitation. If you're running a progressive pitch impeller, such as a 13/19, you may even need to have the pitch modified, maybe to something like a 14/16. Again, this is one of those variables that you have to experiment with. [/QUOTE]
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Jet Jon Build Pics ...VIDEOS LINKED!!!!!!
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