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  1. #1

    thinking out side the box

    so im trying to get a rxp to leave hard. thinking of dropping way low to a 13/18 prop any ideas on this yes i know im going to wind the crap out of it on top but will have an ecu. I just want it to leave hard!

  2. #2

    Join Date
    Jan 2006
    Rydal, Georgia U S A
    Depends on if you use a guage or a mfr's number, 3-4 blade. Pm me.

  3. #3
    ROTAX RACING performance
    Join Date
    Apr 2005
    we use and james bushell use a 13/18 3 blade with the AUTRONIC ECU 8500 RPM, pefect holeshot
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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