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  1. #1
    Moderator RX951's Avatar
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    R.A.D. RELATIVE AIR DENSITY CALCULATORS.

    R.A.D. Calculators

    http://wahiduddin.net/calc/calc_hp.htm

    http://www.csgnetwork.com/relhumhpcalc.html

    Here is a link for calculators for any and everything engine related

    http://www.hotrodders.com/kb/browselinks.php?c=58


  2. #2
    ABBOTT's Avatar
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    As usual - great information to have access to.

  3. #3
    Hydrotoys's Avatar
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    A version if you take your PDA to the lake.

    http://www.hydrotoys.com/wavs/pda-de...a-denscalc.htm

  4. #4
    Moderator RX951's Avatar
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    ttt

  5. #5
    philip_gpr's Avatar
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    I use the gauge I bought from Randy at Watcom

    www.watcon.com

    http://www.watcon.com/Catalog_Pages/...sity_Gauge.htm

    The Rad routinely changes 4-5 points where I live (even with the temperature bing the same) - by using the gauge I can determine if it is my latest mod that is slowing me down or if it is just the air. I record the Rad everytime I ride.

    Other items I use of Randy's

    - impeller gage
    - marine grease
    - piston inspection light
    - leak down test kit

    He has all sorts of hard to find items on his site

  6. #6
    FirstFastGPR's Avatar
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    Stockton, CA
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    RAD

    Really you need a air sampler/weather analyzer for quick accurate density altitude numbers. The formulas are fine but you still need accurate data to plug in to the formula. Air samplers are the only way to go. If you are serious about performance mods and knowing what works and what doesn't, then an air sampler is a must. Plus like Phillip_GPR said you need to check you air after any tuning or parts change to keep a baseline.

  7. #7
    Moderator RX951's Avatar
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    www.Accuweather.com has hour by hour data updates. Works fine for any part testing for the rec riding I do.

    Here is a site below that sells portable weather stations/samplers that are easy to carry and affordable

    http://www.weathershack.com/portable...-stations.html

    The Kestrel 4000 Pocket Weather Tracker seems to do it all.

    Barometric Pressure & Trend
    Altitude & Density Altitude
    Relative Humidity & Dew Point
    Wind Chill & Heat Stress Index
    Wet Bulb Temperature
    Air, Water, & Snow Temperature
    Current & Average Wind Speed
    Maximum Wind Gust
    Clock & Calendar
    Min/Max/Average Data Storage & Charting
    Waterproof & Floats


    My Local data
    http://wwwa.accuweather.com/forecast...77573&metric=0

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