K&N High Performance Air Filter, Enough performance improvement to justify the cost? Options

[JawjaPorsche]

I was reading K&N's website about their air filters:

High flow air filters designed to improve engine performance
Designed to increase horsepower, torque, and acceleration

Has anyone put these on their stock FI Teeners and experience any of the above?

I am talking about the filters that go in our stock air filter boxes. Not external modification filters. I noticed Pelican Parts sells then as an option.

http://www.pelicanparts.com/cgi-bin/smart/...76%29%2C%20Each

[charliew]

Every hot rod I have had has had a k&n filter but I always kept them clean and they are all low mileage motors. I have decided that when you raise the output of a motor by increasing the airflow through it, it will not last as long as a plain jane strreet driver also only a few times have I ever seen very much visible dust to be concerned when I drive one of them. My main concern is getting enough cfm through the filter and that it is a filter. Really I have never dynoed any of my motors with or without a filter but I'm sure to be a good filter there has to be a restriction. Maybe the next guy that dynos his car will check it out.

MY son called k&n about the cone filter we have in his airbox on his sti, they guy said it wasn't big enough to support the hp he is trying to make. Making a new airbox and getting a bigger filter in the engine compartment is a challenge on the suby.

A long time ago when I was searching turbos I found this: 1 hp = 1.45 cfm
I have a flow bench that will go up to 600 cfm but I haven't made the effort to make a adapter to mount a filter on it.

On the air flow sensor, a lot of people that hot rod use speed density so the oil in the airway won't be as much concern.