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  1. #1

    Question will riva pro reduction nossle help me with x charger?

    i have the stock impeller for now and just installed the x charger with 42 injectors. im at rev limit. will a pro nozzle reduction kit with 81mm ring bring my rpms down enough for now untill i buy my 15/20r?

    the problem is i plan on making alot more mods anyways so the reduction nozzle will be a nice addition to the mod list but i can only afford to buy the reduction kit or the 15/20 right now which would you guys consider .... im afraid with just the x charger im not going to spin the 15/20r enough untill i get the ext cooler and the 4in intake


  2. #2

    Join Date
    Mar 2006
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    Are you burning the prop off the bottom? If not or not too bad, just pitch the stock impeller a touch-- try .040" to the trailing edge-- worked great on my my ski until I added the external intercooler which took a total of .091" to the trailing edge to get it off the rev limiter (x charger, external intercooler, 160 thermo, 42's, home made air setup). When I went to the Solas, I had a hell of a time getting my rpm up-- 1 1/2 days of pitching and repitching AND repitching to get it just right...

  3. #3
    !!!! wave jumper !!!! 05_RXP's Avatar
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    Jul 2011
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    if i were you i would just have your factory nozzle set up to accept the different ring sizes. and pitch your prop it should not cost you more then 100$ to have your nozzle set up for the rings.

  4. #4
    who can set up my nozzle for the rings?

  5. #5
    Hondapro210's Avatar
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    Apr 2011
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    PM slow91 he will machine your nozzle to accept the riva rings for 70.00 and 30.00 to tap for the set screws.

    Read from post 254 - 257
    http://www.greenhulk.net/forums/show...er-head/page26

  6. #6
    !!!! wave jumper !!!! 05_RXP's Avatar
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    Quote Originally Posted by bksbigboy69 View Post
    who can set up my nozzle for the rings?
    slow91 does it i am not sure if nils does. but any machine shop should be able to do it for you. and you can check the classifieds and i am sure there is a member on here that has a whole bunch of rings shipped for 25$ a piece

  7. #7
    WBoulton's Avatar
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    I running this set up with an 81mm ring right now, it works fine.

  8. #8
    MSRXP's Avatar
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    Gain top end but lose acceleration.

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