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  1. #1

    Air temp effects

    I was on the Colorado river in 118 degree air. RPM's wer down to 8060 or so from normally being able to see 8180 - 8200 rpm. Is this normal?


  2. #2
    Moderator Snoman's Avatar
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    Yes it is,higher air,water temps and humidity will kill RPMs on these skis....

  3. #3
    83.0 @ 8400 jhill19's Avatar
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    And elevation

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    Mothman's Avatar
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    I'm sitting at 3100ft. Yea buddy, elevation and hot air!
    When I ride at PK (1000ft) my rxp seems to grow an extra cylinder.
    I can't imagine the power closer to sea level... wow.

  5. #5
    83.0 @ 8400 jhill19's Avatar
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    I'm rode at 1650 ft this past week. Typically I'm at 500-600 back home and I can tell a big difference riding here at the lake and back home on the river

  6. #6
    Thanks for the info. At least the water temp was 71 degrees.

  7. #7
    To much is never enough Badvgood's Avatar
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    See I am so lucky in some respects here in the UK with relatively low air temps and being at sea level. Max RPM all the time. However I would swap 500 rpm or so for some heat. It is cold here this year and we could do with a warm up!

  8. #8
    JT jpt7779's Avatar
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    Check this out: http://wahiduddin.net/calc/calc_hp.htm

    Enter some basic weather info and you will see dramatic effects on Horsepower and RAD - relative air density. You will find that cool air temps, high pressure 30.00 and above, low humidity, low dew points will yield 100% plus horsepower.

    Conversely, hot air temps, high humidity, high dew points, high RAD #'s, LOW pressure below 29.92 will yield poor performance.

    This is why you will see 150-200 rpm changes day to day with big weather changes - it really does make a huge impact!

  9. #9
    Mod less, ride more! troyheb's Avatar
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    When we where in Laughlin on the Colorado river last year it was only 115*, but I could not stay off the rev limiter. This was on my TX. Riding it just days before back home in 95* heat and 95% humidity rpms were 8040.
    Coming from an area that has hot temps and high humidity I have found that humidity affects power more than temp.

  10. #10
    Interesting. Where do you ride normally with the high humidity?

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