Quote:
Originally Posted by mrnickleye
Also, that every NAME brand filter performed almost identical to each other, air flow, and filtering properties.
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While I agree that, in general, most air filters do permit similar air flow levels. I completely disagree with the statement that their filtering properties are "almost identical".
Most high performance filters let a LOT more crap through than the less expensive ones.
I would love to see a test showing that FRAM and Wix air filters filter as well as Apexi, K&N, HKS and especially Blitz's stainless steel filter. Last time I asked for this from someone making the same claims they replied with: "Oh, sorry I was thinking of oil filters"... Which don't perform the same from one to the next either.
Also lets keep in mind that all of these various media have VERY different properties the longer they're in service. Filters using oiled media or graduated density media start out letting tons of crap though, but do a MUCH better job catching smaller particulates than fiber media will at any point in it's serviceable life span. Paper filters do a great job for MOST of their VERY SHORT life span.
What it comes down to is not only the passable surface area but the opening size. You have two perforated screens, both have a 50% open surface area... one has holes .1" in diameter, the other .75" in diameter. They both block 50% of oncoming air, but only one's going to stop a bucket full of gravel.
Now, with all this in mind, happy shopping.