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  1. #1
    Banchy's Avatar
    Join Date
    Jul 2009
    San Juan PR

    intake grate hole

    Click image for larger version. 

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ID:	240969Click image for larger version. 

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ID:	240968what is the zise of the hole in the intake grate and pump shoe on the Yamaha conversion? ... thanks guys

  2. #2
    Hydrotoys's Avatar
    Join Date
    Jul 2005
    Mesa, AZ
    That is a variation of the "package" that Kerry was selling a few years back. His was in the shoe only, and located farther back. Some, including Insanediego Joe was using this, with holes similar to yours.

    I don't have the recommended hole-size numbers in front of me, but with the speeds and loading capabilities of these skis, you will need something other than holes in the shoe to help you out when the pump pressure increases due to speed/angle. That grate on the right looks like a modified 800 grate. Possibly SST?

  3. #3
    Autosport's Avatar
    Join Date
    Feb 2007
    In the Fast lane
    put it this way, that pump shoe photo (I don't know where you got it from) but it is my pump shoe, I have those two holes, plus a 3/4" pressure reliefe valve and a 1/2" pressure reliefe vavle and my Motec is telling me I'm still seeing 55-60psi pump tunnel pressure.

  4. #4
    Moderator Insanediego Joe's Avatar
    Join Date
    Mar 2006
    San Diego, California, United States
    7/32" hole size and it wont be enough.

  5. #5
    Banchy's Avatar
    Join Date
    Jul 2009
    San Juan PR
    thanks guys for all your help, this is a grate forum and all you grate guys.

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