CAI draws in hot air?
http://www.pca.org/tech/tech_qa_question.asp?id={7DD8950D-85E2-4C15-970C-2E1C92FEAB3A}
K&N type oiled filters LOSE HP?
The stock engines will not flow more air than the stock filter allows. More horse power is lost when installing a lifetime air filter and then allowing it to get plugged up and dirty.
http://www.pca.org/tech/tech_qa_question.asp?id={9FD3C522-3ED5-4939-A33C-D93558C2FE74}????
If, in fact, the car cannot draw more air than the OEM filters allow, it would seem this modification is a waste of money?
No what I think they mean by that is the engine draws in whatever the air filter allows, stock or otherwise, and thus a hi-flow filter might let more air in initially until it gets dirty/clogged in which case it will allow less. That's how I read that, and that is what is accurate, but I agree the wording is somewhat confusing.
Yes, he is saying that by saying
More horse power is lost when installing a lifetime air filter and then allowing it to get plugged up and dirty.
However, reading closely he says
I would always recommend the stock ones to be replaced when needed over an oiled one. The oiled filters do not filtrate as well ...
The stock engines will not flow more air than the stock filter allows.
[boldface mine]
If the stock engines will not flow more air than the stock filter allows, then buying an oiled one does nothing.
True? or not?
The two important components of an air filter are flow and filtration. Filtration has to do with the micron rating - think how tight the fabric is. Flow is affected by the number of pleats in the element - think surface area - More is better.
I have rarely seen an after-market filter have as many pleats as a stock element. What they tend to do is have a smaller surface area with a greater flow in the sense that the material isn't as dense (meaning dirt can enter you engine). That is the reason for the oil.
And an oil bath air cleaner is actually better than a dry element. However, these oil treated filters aren't exactly an oil bath, so it will clot and needs to be cleaned at specified intervals or the engine will not perform as well.
