Posted by JDEM on October 15, 2017 at 06:41:54 from (70.194.5.185):
In Reply to: KN air filters posted by Mtractor on October 14, 2017 at 18:12:47:
I've heard many claims for years like "I think it has more power, or "much better mileage." All nonsense as far as I can tell. Try to find even one verifiable example of a controlled test on a stock engine - with OEM intake and then aftermarket intake. I bet you will not find results anywhere of a K&N gaining anything, except making your wallet lighter.
Auto engineers do a lot of research and are not going to install an air intake or exhaust that results in worse efficiency.
I did CFM and volumetic efficiency calculations on many of my rigs. 1985 Ford F250 with a 6.9 diesel, 1983 Chevy with a 6.2 diesel. 1978 Toyota truck with a 2.2 gas engine, 1994 Ford F250 with a turbo 7.3 diesel, and 1988 Toyota truck with a 2.4 gas engine. ALL have more CFM allowance in the intake and exhaust then the engine can use - stock from the factory. Most exceed need by 10-15% when engine is at max power.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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