Meteorological effects on fuel dose

[bury]

Hey

I am looking for informations connected with topic 'meteorological effects on fuel dose'. I thinking about how e.g. air humidity, pressure etc. influence it. Do You have any materials about that? I would be grateful.

[Mk1rocco]

The only meteorological thing that effects engine performance is air density and the two main factors that determine air density are atmospheric pressure and temperature, unless you're in a situation where carb icing is a possibility, humidity can be ignored as it otherwise has very overall little effect . The effect of air density on engines is fairly minor issue with automobiles but it's a really major (i.e. life and death) concern on aircraft engines so if you want to learn more about the effects of air density on engine performance, check out a few aviation sites, what you learn there can be applied back to automotive engines.

[Bernard Fife]

bury,

Temperature, elevation and humidity all have an effect. MegaSquirt controllers measure the barometric pressure (that changes with elevation and weather) and air temperature, but not the humidity. See: http://www.megamanual.com/v22manual/mfuel.htm

For the effects of humidity, see: http://www.racecarbook.com/articles/humidity.shtml

And to play with the values, check this out: http://wahiduddin.net/calc/calc_hp.htm

Lance.