The atomization that's being talked about is not the air, but rather the fuel, and it ceases to be much of a problem with MPI. Having cold air pumped into an engine is basically what you want, since cold air is denser, and you can ram more into it. This is the big complaint about turbo/super chargers, is that they heat the air up so much that you can actually lose some performance with them. Atomization of the fuel is what you want, since this delivers an even spray in the cylinder, and theoretically, the best bang for your buck. Preheating of intake air was necessary on carbed vehicles, because the fuel and air mixed in the carb, and the cold air would chill the gas and cause it to de-atomize (proper word here?...), resulting in a poor explosion in the chamber. With MPI, the fuel and air mix in the chamber, and temperature of the air has little effect, though cool air is better, being more dense.
Pat Buthmann
'97 Dakota Sport Club Cab...5.2 V8, 5 Spd...
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