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Old 02-18-2009, 08:36 PM   #28
Engine Surgeon
 
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
Quote:
Originally Posted by mikefocke
You seem to be a results-based engineer and the results I've seen say I wouldn't let one near my car for longevity reasons.

Can you cite any independent tests that refute the ones cited here ?
Mike,
I typically am not a fan of K&N filters, in fact I generally find that they are counter productive for power plus a lot of the gripes that you stated in the article on your site.

The M96 filter has not followed suite with the previous units I have noted for other applications. I feel that part of this is due to the location of the Boxster's air intake. I have not noted any issues with the unit and my shop is at the end of a 1/8 mile dirt road.

I was able to pick up a solid 1 MPG (data logged) with the K&N in place and in every run on my dynojet I have seen a 2HP increase at minimum. Tonight I ran a test and saw almost 4HP from an engine that I was gathering baseline data from before we do an ECU flash tomorrow. I swapped the K&N for the stock filter back to back as I do with most every combination.

I give everything a chance to prove it's self and the K%N was something I was objective of until I saw the benefits in data, and didn't notice any degradation in filtration.

A bone stock engine won't see enough of a benefit from the K&N to justify it's expense and added maintenance, but when a 2.5 approaches and exceeds 200 RWHP the benefits are favorable.

My only gripe is that over-oiling the element can foul the mass air sensor and cause problems.
Jake Raby is offline   Reply With Quote
 



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