Sri or short ram intake is a better way to go on these engines imo. Seen to many probs out of the "cold air" intakes. Had the k&n on mine with the injen filter and loved it. Sounded awesome and felt a little better throttle response. Have my k&n for sale now if your interested. Alot cheaper then buying new.
You probably read someplace that cold air is more dense than warm air, therefore you get more air into the combustion chamber and more power.
But you didn't read that cold air forms droplets in the fuel that vastly affects the air fuel ratio and doesn't burn as well. With carbureted vehicles, a heated air cleaner had to be added to atomized this fuel, was thermostatically controlled to maintain a temperature of 165*F. Atomizing the fuel is far more important than increasing its density. Make sense?
Manifold fuel injection did help to atomized the fuel, but only a tiny step forward. Actually worked better with cast iron intake manifolds because of their thermal conductivity, but most are using plastic now. Why? Because it cheaper, but can't tell this from the sticker price.
EPA's solution to these colder climates, like in Wisconsin with -30*F temperatures is to blend the fuel to make it more volatile that also has a bad side effect of reducing its BTU heat value. Thus even with colder air more dense, both performance, and in particular fuel economy suffers. But their goal is less emission, have to burn what's in there to reduce emissions.
One sure cure for this is to dump manifold fuel injection and go to direct fuel injection, spraying that fuel into red hot combustion chamber atomizes it in a hurry. But its very limited in terms of fuel economy, maybe 10% instead of 30%, problem with the latter is excess NOx production. Another problem is with the majority of vehicles still using manifold fuel injection, you can't buy the fuel you need to take full advantage of this.
All this stuff is in books with well over a hundred year history of automotive production. But those that pitch cold air injection stop reading at the point. Get the whole story.
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