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Originally Posted by trd12
woah woah woah...i think you got things mixed up...cold air is more dense (fog settles) and warm air is less dense (hot air rises) therefore someone closer to sea level such as the houston area your truck would get better mpg than someone in the denver area...when the air is cold your sensor knows and more fuel is put into your engine--so in denver wouldn't you be using more fuel??? jw
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There are wo different aspects to think about when it comes to air density. Temperature and Ambient Pressure. Temperature you have the right idea about (Cold Air is Dense and Sinks, Hot Air is less dense and rises). I was trying to explain how someone at sea level will be bringing in more dense air because of their altitude/elevation compared to someone who lives in Denver at 5,000 plus feet in elevation. As you go up in altitude air density/pressure decreases meaning less molecules of Oxygen per given volume of air. Less oxygen means you need less gas other wise you would start burning too rich. Vice Versa if you go down in altitude your air density/pressure increases meaning you have more Oxygen molecules per given volume of air meaning that you need more fuel or you will go lean. Thus, places like Houston or where I live you will burn more gas generally, but also get more power. This is why piston-powered aircraft have mixture control knobs so you can avoid being too rich or too lean as you change altitiudes. Our trucks do this automatically by the MAF, computer and fuel injection system. Some older carbureted cars had mixture set screws that you could adjust if you took the car to higher altitudes.
About the Fitch Fuel Catalyst, I haven't looked at it yet but what is the idea behind how it works? It seems like quite a bit of work and $ for a savings that could be achieved by improving driving habits.