Quote:
Originally Posted by DSMHondaGuy
There's logic behind hot hair increasing mpg, not much with cold air that I can personally think of. It's denser... which means more will enter the cyl, which means the fuel mixture will need to be enriched to be correct, which means more power. But We're not after power, we're after getting "just enough" power to get to speed and maintain it so we burn as little fuel as possible.
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Maybe it would be able to run leaner instead of richer, due to the denser air being colder enough to not increase NOx emissions so much. And that greater air flow (by mass, not volume) could actually compensate for the lower amount of chemical energy provided by the fuel. Not a bad idea at all.