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  1. #1
    Hydrotherapy's Avatar
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    stupid question time again..

    hi,stupid question time again....,.,been out on ski today and after modds i have done need to know.... this is the stupid bit regardless of any mods what is the top speed of a stock 14/20 dyna fly..
    Last edited by Hydrotherapy; 11-24-2006 at 10:50 AM.


  2. #2
    Duke's Avatar
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    Don't know the top speed but I have been 75 with 85mm
    nozzle at 7210. Surely with a 1300 it would be faster.

  3. #3

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    What mods, mph, rpms are you running now?
    You will continue to go faster the more rpms you turn that prop, but once you get above the power range of your engine/pipe its time to pitch up and return you should gain even more mph.

    I guess you question is at what RPM do you need a repitch? This answer varys but imo if your above 7250-7300 then you could repitch to bring it down to 7150-7200 just keep in mind your rpms will drop off when summer time comes.
    Last edited by Ronn25; 11-23-2006 at 07:43 PM.

  4. #4
    Hydrotherapy's Avatar
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    DUKE thanks any one got a bigger number for stock 14/20 please post it..
    Last edited by Hydrotherapy; 11-24-2006 at 10:50 AM.

  5. #5
    Hydrotherapy's Avatar
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    Quote Originally Posted by Ronn25 View Post
    What mods, mph, rpms are you running now?
    You will continue to go faster the more rpms you turn that prop, but once you get above the power range of your engine/pipe its time to pitch up and return you should gain even more mph.

    I guess you question is at what RPM do you need a repitch? This answer varys but imo if your above 7250-7300 then you could repitch to bring it down to 7150-7200 just keep in mind your rpms will drop off when summer time comes.
    hi ron ,buddy and i are thinking of some thing out side the box,i just want a few hot numbers with a stock 14/20,i know it sounds daft crazy or as i posted stupid but we have a project in the pipe line,dont worry my bud is the brains i just do the spanners.. may pm you the idea but if you know it has been done before and failed then you will piss on your bon fire..some times its just as much fun to try and fail than get it spot on
    Last edited by Hydrotherapy; 11-24-2006 at 10:14 AM.

  6. #6
    YudLuz2's Avatar
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    The prop doesn't loose any speed, it just keeps going. The limiting
    thing will be how many rpms your motor will turn it like Ronnie
    stated. On a single pipe pitched up to keep it in your peak HP range.
    Mine has ran 8250 rpms at 87.5 mph with a stock 14/20 out of the box.

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