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  1. #1

    Join Date
    Jan 2007
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    Barrie ONT CND
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    11

    08 RXPX Should I change my impeller also

    On my 08 RXPX,not sure what I should do.
    I want to put a 4 inch air for sure but if I put a intake grate do I have to change the impeller?How much speed will the grate and no impeller give and how much will the grate and the 15 22r impeller give?


  2. #2

    Join Date
    Sep 2007
    Location
    Lexington, Ky
    Posts
    1,656
    Quick summary...

    OEM intake grate = sux. It acts like a brake at top end, you'll pick up 1-2 mph just from changing the intake grate.

    Oem prop is only good up to about 75 without it being tweaked. I've heard of people doing 80+ on re-pitched, tweaked OEM X props...

  3. #3

    Join Date
    Jan 2007
    Location
    Barrie ONT CND
    Posts
    11
    So... leave the impeller for now and maybe a worx grate and a 4inch air and I should be good for 72 mph

  4. #4

    Join Date
    Sep 2007
    Location
    Lexington, Ky
    Posts
    1,656
    Sounds about right. It's all about where your RPM's are as far as what to do with the prop.

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