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Jet Boats
General Jet Boat Discussions
Stomp grate question
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<blockquote data-quote="Ranchero50" data-source="post: 404260" data-attributes="member: 1523"><p>I would be more concerned about the pressure drop behind the grates. If the area taken by the grate is much smaller than the area of the port behind the grate I think the water would be more susceptible to cavitate, especially if you are close to pump area (pie x R2). </p><p></p><p>However if your grate opening area is much larger than the pump face area you should not have a restriction at the grate. I think that's why mine works pretty well. I used a sport jet grate and the area between the grates is much larger than the pump inlet area. Basically the S/J grate is slightly shorter but 3x the width of the Doo grate. You do not want any venturi effect (pressure drop) through the grate (contributes to cavitation) and a larger grate area will allow you to maintain performance with a partial blockage.</p></blockquote><p></p>
[QUOTE="Ranchero50, post: 404260, member: 1523"] I would be more concerned about the pressure drop behind the grates. If the area taken by the grate is much smaller than the area of the port behind the grate I think the water would be more susceptible to cavitate, especially if you are close to pump area (pie x R2). However if your grate opening area is much larger than the pump face area you should not have a restriction at the grate. I think that's why mine works pretty well. I used a sport jet grate and the area between the grates is much larger than the pump inlet area. Basically the S/J grate is slightly shorter but 3x the width of the Doo grate. You do not want any venturi effect (pressure drop) through the grate (contributes to cavitation) and a larger grate area will allow you to maintain performance with a partial blockage. [/QUOTE]
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Stomp grate question
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