Air filter test
 

This test was done on DP a few years ago and is why I only run the stock filter on my truck.

Maybe this could be made into a sticky.:c:

Thanks for bringing this topic back to light DB. Sticky done!!!

Too bad the data is too old to have AMSOIL's new nanofiber filters to compare to. Be curious how they pan out.

This is a bunch of bull. Isnt AC DELCO partially owned by GM? Wouldnt GM benefit from the marketing of AC DELCO filters?
this test was biased. Im sorry but its the truth. they were testing it to find the best filter for a duramax (GM) its a sales pitch for AC DELCO. If we got any any of those other filters site they would have way different results.

If AC DELCO didnt place first in all of the readings then I would be more apt to believe it

i have a AEM wounder where that would be on there?

uummm...no sir. This test was done by an individual who was a member of the diesel place and was just a fellow diesel enthusiast. He began performing the tests in his garage until he got educated on the proper filter testing methods and built proper test fixtures. The end result was that K&N invited him to tour their facility. At the end of the day they basically told him to keep his mouth shut. Dyno testing also proved the fact. The thread of SPICER's testing still exists at the diesel place because it got the attention of every major filter manufacturer. Go do your research before making any misleading statements or biased innuendo's on a very well known fact.

I don't disagree with the statements made but one must be very careful spouting off about testing methods and so forth.

Things to consider: ISO testing is only a method to discribe how something was tested and if the results can be tracked and repeated. ISO = International Standards Organization. I have written many a ISO proceedure. They don't come from the scientific community (unless you need it to). The method of testing that should be considered more accurate and industry standard would be something from SAE. I know I have the number somewhere but I can't find it right now.

Next, if you read it carefully the results are not for the same filters for the same testing. The part number for example of the AFE changes to suit the results. This is the same for the K&N.

Further, remember that in a diesel air + fuel - waste = power. It is a simple equation. The concern one should have is that how clean is that air, how clean is the fuel, what are my waste factors and how much power is being added as a result. It is a trade off with performance filters.

I have run K&N in my Dodge as well as the current unit an AFE non-PG7 w/ a prefilter and the intake tube at the compressor is so clean you could eat off it.

I would not knock someone for using the OEM drop in filter but I would question anyone using an aftermarket filter that isn't properly cared for.

Just my thoughts.

you beat me too the ISO.

still. to have your filter come out ahead in every bit of testing is kind of far fetched

i agree with GRI and Wyatt and i'll go maybe one step further....
the test is totally biased and B.S.

Biased perhaps but I wouldn't call it BS. It is like accounting you can get numbers to tell you what you want to see.