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  1. #1
    is thinking. grantuk's Avatar
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    What size are 'X' model injectors???

    I have tried to search but cannot find the answer.

    Are they 42 or 48lb an hour?

    Also where can you buy them as the OEM store only goes up to 2007.

    Thanks


  2. #2
    Site Admin Green Hulk's Avatar
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    Dave Sharp dav_dman's Avatar
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    yet it's okay to run stock 38's if we add an x s/c and xs intercooler with intake mods as long as we use an rrfpr? does the rrfpr at 60psi provide more pressure than stock?

  4. #4
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by dav_dman View Post
    yet it's okay to run stock 38's if we add an x s/c and xs intercooler with intake mods as long as we use an rrfpr? does the rrfpr at 60psi provide more pressure than stock?
    Yes, fuel pressure increases as boost increases.

  5. #5
    speedskixp's Avatar
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    Quote Originally Posted by dav_dman View Post
    yet it's okay to run stock 38's if we add an x s/c and xs intercooler with intake mods as long as we use an rrfpr? does the rrfpr at 60psi provide more pressure than stock?
    Yes, this is the exact setup I am running and it works great.

  6. #6
    Dave Sharp dav_dman's Avatar
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    i meant at idle to 2000 rpm say the rxpx is 12 afr, then i would think the 38's would make it 14 afr. Unless the idle fuel pressure of the rrfpr is higher than the idle fuel pressure of a stock non x ski. dont mean to belabor the point; just dont quite get it.

  7. #7
    speedskixp's Avatar
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    Yes, the base pressure of the stock reg is 58lb and you set the base pressure of the rrfpr at 60lb.

  8. #8
    HighPSI's Avatar
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    Wow, only 42#? They must be close to static on a stock ski unless the fuel presure is a lot higher than 3 bar. At 45 psi that will only support around 250hp at a bsfc of .50. Does anyone know what the static fuel pressure is on a stock ski?

  9. #9
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by HighPSI View Post
    Wow, only 42#? They must be close to static on a stock ski unless the fuel presure is a lot higher than 3 bar. At 45 psi that will only support around 250hp at a bsfc of .50. Does anyone know what the static fuel pressure is on a stock ski?
    They run the fuel pump at 14.4 volts on the X models to increase the pressure to the point the injectors are flowing 50 lb hr.

  10. #10
    Moderator RX951's Avatar
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    welcome to the forum HighPSi

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