something i saw on a forum that i just knew would interest everyone
In reference to your question about air filters. K&N is best for flow
restriction but hardly the best performer for removing particulate
material from entering your engine. Personally I would never use a K&N
for a personal vehicle, a race car? maybe. Anyway here are the results
of the air filter tests that is posted at dieselplace.com.. Just
sharing real data here.
FLOW RESTRICTION: FROM BEST TO WORST:
FILTER RESTRICTION in Inches H2O
Mystery bargain filter 4.78
AFE Pro Guard 7 Panel 4.99
AC Delco 6.23
DIRT HOLDING CAPACITY:From best to worst. This is the AMOUNT OF DIRT
it took to create an ADDITIONAL 10 inches of water restriction. At
that point the test is terminated.This indicates HOW LONG a filter is
good before it must be cleaned or replaced.
AC Delco 573.898 grams
Mystery bargain 350.402
AFE Pro Guard 7 232.516
TOTAL DIRT PASSING THE FILTER DURING THE TEST:. This is how much dirt
your engine will take in if you use the filter for the duration that
would cause the filter to become "dirty" enough to need replacement or
cleaning. The "Dirt Passing The Filter" is the dirt collected by the
"Post Filter" during the test.
FILTER DIRT IN GRAMS PASSED
AC Delco 0.4 g
AFE Pro Guard 7 1.8g
Mystery Bargain 2.4g
Note: The Purolator was reported to have a seal malfunction during the
test and passed more dirt than it would have with a good seal.