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  1. #1

    Default Humidity vs performance

    Iv noticed when it's raining I have significantly less power, is that a normal thing? No its not because im losing traction.

    Sent from my 5017B using Tapatalk

  2. #2

    Default

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

    Engine Tuner's Calculator
    - using relative humidity -

    To use the calculator, just click the type of units that you will be entering, then enter the elevation, temperature, altimeter setting and relative humidity... then click the calculate button.



    The atmospheric pressure, temperature and humidity all affect the density of the air. On a hot day, or at high altitude, or on a moist day, the air is less dense. A reduction in air density reduces the amount of oxygen available for combustion and therefore reduces the engine horsepower and torque. For tweaking the fuel/air mixture, or predicting engine power, the air density is the most important consideration.


    Inputs:
    Elevation (also called Altitude) is the geometric elevation above mean sea level at which the engine is being operated.

    Air Temperature should ideally be the temperature of the air that is going into the intake of the engine.

    Altimeter Setting is the value in the Kollsman window of an altimeter when it is set to correctly read the elevation.

    Note: For more information about ambient air pressure measurements see the pressure measurement page.

    Relative Humidity is the ratio of the partial pressure of water vapor to the saturated vapor pressure at a given temperature.

    Note: The calculator which uses Dew Point is often more accurate because the dew point is fairly constant for a given air mass and changes very little until another air mass arrives, while the relative humidity varies greatly as the ambient temperature changes.

    Note: The altimeter setting and relative humidity can often be gathered from a local airport, local weather service or the national weather service. Click here for NOAA weather data including listings of relative humidity and altimeter setting for worldwide locations, in both English and Metric units.

  3. #3

    Default

    A lot of information to consider, thank you!

    Sent from my 5017B using Tapatalk

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