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  1. #1
    AZRIVERBOY's Avatar
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    21 px 300 10 hours stage two 82.16 mph on phone gps - very happy with results

    I purchased my 21 RXPX 300 with audio on 1-31. After about 5 hours I flashed it with with the Bone stock flash and was hitting 77-78 on the dash. I then disd the following a went back to my riding spot and re tested yesterday with the following Mods.

    Home made rear air 4" with K & N filter
    4 2" holes in top deck with Frogskinz covering them.
    Gutted Intake manifold Flame Arrestor
    Reflash to Stage 2 on my Maptuner
    stock impeller

    I weigh 255lbs

    Colorado Rver Parker Az about 500' elevation
    water temp 60
    air temp 78
    river current about .5 mph
    3 bars fuel

    82.16 on phone GPS APP, dash read 83 and flashed 84

    Very happy with these results!
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  2. #2
    ptscon's Avatar
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    Awesome numbers for those mods, I'll be slapping on a larger charger and a cam when mine arrives.

  3. #3
    r1goombah's Avatar
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    Quote Originally Posted by ptscon View Post
    Awesome numbers for those mods, I'll be slapping on a larger charger and a cam when mine arrives.
    Which charger and cam you going with? My 135 just cam in and have a east side cam thinking about installing

  4. #4
    ptscon's Avatar
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    Quote Originally Posted by r1goombah View Post
    Which charger and cam you going with? My 135 just cam in and have a east side cam thinking about installing
    Will be running same cam as I do in my current 260 https://activejetsport.com/product/s...race-camshaft/ still deciding between 135 or 142 charger.

  5. #5
    AZRIVERBOY's Avatar
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    SOME ADDITIONAL PICTURES OF INTAKE AND REAR VENTILATION. AS WELL AS INTAKE MANIFOLD WITH GUTTED FLAME ARRESTOR.
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  7. #6
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by AZRIVERBOY View Post
    I purchased my 21 RXPX 300 with audio on 1-31. After about 5 hours I flashed it with with the Bone stock flash and was hitting 77-78 on the dash. I then disd the following a went back to my riding spot and re tested yesterday with the following Mods.

    Home made rear air 4" with K & N filter
    4 2" holes in top deck with Frogskinz covering them.
    Gutted Intake manifold Flame Arrestor
    Reflash to Stage 2 on my Maptuner
    stock impeller

    I weigh 255lbs

    Colorado Rver Parker Az about 500' elevation
    water temp 60
    air temp 78
    river current about .5 mph
    3 bars fuel

    82.16 on phone GPS APP, dash read 83 and flashed 84

    Very happy with these result
    Impressive! 82 mph at what RPM?

  8. #7
    AZRIVERBOY's Avatar
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    When I made that run I wasn’t really paying attention unfortunately. earlier in the day I was hitting 8300 RPM so my guess is somewhere between 8300 and 8400

  9. #8
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by AZRIVERBOY View Post
    When I made that run I wasn’t really paying attention unfortunately. earlier in the day I was hitting 8300 RPM so my guess is somewhere between 8300 and 8400
    Excellent. Are you planning any further mods?

  10. #9
    AZRIVERBOY's Avatar
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    Quote Originally Posted by 1tommygunner1927 View Post
    Excellent. Are you planning any further mods?

    Retarded cam mod. I am good with a 85MPH ski that is reliable!

  11. #10
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by AZRIVERBOY View Post
    Retarded cam mod. I am good with a 85MPH ski that is reliable!

    Retarding the cam will lessen holeshot with no other changes, but may increase top speed slightly.

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