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  1. #1
    southampton u.k boohoo's Avatar
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    81mm ring or repitch 15/19r?

    Ok got my first chance to to hold it wot yesterday and was seeing 8100-8200 constant, flashing 8350 when it came unhooked...question is can i repitch or do i really need the adjustable venturi...or is there a cheaper way to mod the standard venturi?
    cheers jon


  2. #2
    JFizzleJR's Avatar
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    Is this with an aftermarket ECU?

    You should try re-pitching first if you need to go up/down by more than 200 rpms, unless you plan on getting the adjustable venturi anyway.

    I only know of one person who successfully machines the stock nozzles to fit the rings..

  3. #3
    JFizzleJR's Avatar
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    I read your signature and have come to the conclusion that this is most likely the stock ECU. You can pitch your prop to match your needs but I suggest you get the adjustable nozzle and venturi rings so you can adjust your rpms not only now, but during moderate/extreme temperature and climate changes.

  4. #4
    ou812's Avatar
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    Quote Originally Posted by JFizzleJR View Post
    I read your signature and have come to the conclusion that this is most likely the stock ECU. You can pitch your prop to match your needs but I suggest you get the adjustable nozzle and venturi rings so you can adjust your rpms not only now, but during moderate/extreme temperature and climate changes.
    Ya beat me to it.
    I'm spinning the 15/19r on an 83mm ring at 8100rpm in 110
    + temps & 90degree water. If I go to an 82 I lose all the fun of the prop.

    When the cooler season is here you'll gain 100+ rpm & will be able to use the smaller rings. Or, you can take the prop out send it off, wait a week or 2 or do it yourself & hope it's the right pitch, then do it all over again when the season or climate changes. Or have 2 props for the changes.

    Yeah, i'd say adjustable nozzles.

  5. #5
    southampton u.k boohoo's Avatar
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    I'm in the peak of the hot season water temp 68 air temp 75 ish...hummidity ha ha no such luck!....don't think i need adjustability just to drop rpms.Maybe i should get a 15/20r?

  6. #6
    sleeplessnMS's Avatar
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    Yeah, i'd say adjustable nozzles.
    ditto....

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