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Thread: Top speeds

  1. #1
    *STX-15F* Kawi15f#12's Avatar
    Join Date
    May 2007
    Cayman islands

    Top speeds

    What are the top speeds you all are getting with a naturally aspirated motor with mods?...trying to get the most out of mine without going internal or forced induction

  2. #2
    Having Fun jp1300r's Avatar
    Join Date
    Sep 2005
    If you talking about an STX-15F. 66-67MPH with RIVA RPM kit, full exhaust mod, outside air intake. Maybe a little over 67MPH low fuel ,good cold air and perfrect water.

  3. #3
    *STX-15F* Kawi15f#12's Avatar
    Join Date
    May 2007
    Cayman islands
    the water conditions down here are different so dont get those speeds...more humid n rare do we get flat calm water but last i gpsd 61.9 but i have the intake grate so that slows me down, i gps 63.2 with stock intake grate n stock impeller both times with between half n full tank of gas. Need the intake grate in the rough water so leavin it on but i havent gpsd in a while n water is gettin cooler now

  4. #4
    R5 Water-X Racing Promoter PowerShot's Avatar
    Join Date
    Jul 2007
    Call me i can help you! you dont need Full exhaust mods and such..I ran 65.3 with grate and all my mods!214-498-3592

  5. #5
    madtown_chris's Avatar
    Join Date
    Oct 2007
    Madison, WI
    Quick Question here...Why does the Macc Racing 15F Mach 1 Kit which for all intensive purposes of arguement is pretty close to the RiVa RPM kit as far as mods require 92 octane...? Does the RiVa require 92+ octane as well...??

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