blttzen wrote:1. Steady state standardized tests are rarely useful in the real world.
2. His results are common sense. Less restriction = more gets through. The only way to counter that is to have the same restriction per square inch, but more surface area, which is actually what paper filters can do very well. The gauze filters rarely have as many vanes as paper filters.
3. Because of the method of calculating the quantity of dust that gets through, it doesn't tell you how much of what size is getting through.
4. "better airflow = more power" Contrary to what he says, it does. Maybe not in a big, low RPM diesel with a filter the size of some small states, but in small, higher RPM turbo engines I think the difference is probably greater.
1.) Realllly? And why not and to which world do you think they would better apply?
2.) Well, got that one.
3.) Ummmmm.....and your point is? I guess rocks would be worse.
4.) Depends on the base restriction. Gains can be negligible while wear can increase exponentially.
blttzen wrote:K&N has been around for 30 years. If the product was that bad it would have been drummed off the market long ago. Everybody has a point to prove, and you can usually devise a test to prove YOUR point, or highlight YOUR product even if generally not valid. Or you can just make it sound real official and make data up. In case you haven't noticed, this happens ALL the time in the aftermarket accessory Biz. There are Dozens of K&N vs. "Our" filter "studies". Diesels aspirate completely differently than Gas engines anyway.......Whatever. This comes up on every car forum about every 2 months and there are rabid pros as well as cons.I seriously doubt you could actually measure a wear difference in an engine over 100K of use with a properly functioning Paper filter Vs a properly sized and oiled K&N.
The above is a perfect example of someone ignorant of the scientific design of experiments, and the triumph of the belief in a non sequitor over reason.
Belive what you want, but don't ignore data obatined from a well designed experiment. And certainly don't believe everything you read in American advertising.
