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  1. #1
    WATER WOODY's Avatar
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    How many RPM's are you down with hot weather!

    Just curious to hear input from others.Our weather up here @ 4100' in Nevada is generaly dry.Rescently,we have been seeing 35-75 % humidity with temps around 95-107 degrees.I have dropped 40-60 rpm. I might pull the reeds and check them.Strange weather is making it a PITA to tune around.
    Last edited by WATER WOODY; 08-08-2006 at 10:22 PM.


  2. #2
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Here with the heat it's an average of 100 to 150 rpm drop.

  3. #3
    Drink My Dust's Avatar
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    Woody............Here in Indiana the heat will take about 100-150 RPM's away compared to a cool Spring or Fall day.

    I doubt you have anything wrong with your reeds.

  4. #4
    need4pwr's Avatar
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    about 200rpms.....I even notice a drop from morning to mid day of a 100 rpm drop (when temp goes up).

  5. #5
    Fast & Loud meeper's Avatar
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    i

    new wear ring and still only 7900, the front of my prop is dinged up so im hoping thatis part of the issue. the water is like mid 70s at the beach where i ride mostly...i just ordered a prop tool from jerrys shop so i can get that baby sharpened..

  6. #6
    Happily Self-Employed WFO's Avatar
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    Minimum 100 rpms here too. I remember what Mark Trager said to me, "this time of the year, leave your GPS and tach at home and just go ride"

  7. #7
    Hydrotoys's Avatar
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    Quote Originally Posted by WFO
    Minimum 100 rpms here too. I remember what Mark Trager said to me, "this time of the year, leave your GPS and tach at home and just go ride"
    Best advice I've ever heard. I know this sounds nuts, but with 110deg heat, and water temps in the 80's, we see a 300rpm decrease. I prop down for summer, to stay away from deto, and prop up in winter... or use my aat with a different shuttle.

  8. #8
    Moderator RX951's Avatar
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    I'm down roughly 210 rpms vs. what I run in the winter.

    I'm 7120-7150 (warmed up motor) consistently during these summer months.

  9. #9
    mtrager's Avatar
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    A kent and I did a test two weeks ago.

    We both have the same setups except he has power-valves and Jet works.
    Both of us were running 15/24s. From a dead stop there were dead even for as far as we went.

    Next I put a 14/23 on my ski hoping it would have a better hole shot for drag racing. We found that the 14/23 was faster everywhere. It also raided my rpms 150 . The biggest thing we saw was racing around sweeping corners the bigger prop would bog down the motor the minute Aubry turned his bars. I would just drive by.

    So like Hydro toys said either put a smaller prop on or go to an 87 millimeter nozzle.

    And for the record, Last Sunday at the races I had the 15/24 on because the 23 was on my triple.

  10. #10
    WATER WOODY's Avatar
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    Great info guys.Im still going to check me reeds though.One weekend i was running 7100rpm,the next weekend i dropped to 7010-7020 in similar conditions.

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