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  1. #1

    Rive grate, knife edge or leave stock?

    Well ...


  2. #2
    scooby-rxp-doo's Avatar
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    mine's knifed...

  3. #3
    Site Admin Green Hulk's Avatar
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    Leave stock. Rounded leading edges are much better for water flow.

    Think of it like an airplane wing. The leading edge is rounded for a reason

  4. #4
    Pistonwash's Avatar
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    What Jerry said , never kife the edge it will cause cavitation because of the severity of the angle it creates.

    Rounded edges provide a better laminar flow around the edge, better flow. We have seen sharpened edges cause a 1mph loss in top-end speed. No kidding.

  5. #5
    Site Admin Green Hulk's Avatar
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    i knife edged the bars on a stock grate and lost 3.7 mph

    no joke

  6. #6
    GTXX's Avatar
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    blunt on the front or leading edge, thinned some on the back to make it more tear drop shaped, generally smoothed all over. I've seen a small gain(.1-.2) doing stock grates this way on GTX Ltd's, not worth pulling the grate for, but it is one of those little things that adds up.

  7. #7
    Connecticut CrazyA's Avatar
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    Piston, Jerry, and GTXX are dead on. Never knife-edge. It's easier for the water to flow around a rounded edge. As water approaches a knife-edge at an angle, it will cavitate behind it.

  8. #8

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    Me and my better idea's...wonder how good it could have been?

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