Anyone have any issues with the K&N Drop-In Air Filter?

[Johnny-5]

Im reading alot of different reviews on these. Some stating that it fouls up the maf, some saying it doesnt block out the dirt as good as regular filters and others stating they had no issues. Im just wondering if its worth the purchase or if I should just stick with the replacement filters?

Any feedback would be great.

[White987S]

Our OEM Porsche filters are excellent. If you use the K&N be very careful about over oiling. That's how you can fark up an expensive MAF. Proceed with caution.

[JFP in PA]

There is nothing wrong with the stock style filter, and they never oil the MAF. The K&N fiter really adds nothing other than expense.....................

[Johnny-5]

Our OEM Porsche filters are excellent. If you use the K&N be very careful about over oiling. That's how you can fark up an expensive MAF. Proceed with caution.

There is nothing wrong with the stock style filter, and they never oil the MAF. The K&N fiter really adds nothing other than expense.....................

Thanks for the posts. The only reason why Im wanting to go with the K&N is that its cleanable and reusable. So I figured in the long run it would cheaper in the long run rather than buying replacement filters?

[JFP in PA]

A lot of that has to do with were you buy them; OEM filters are expensive, quality aftermarket units (e.g.: Wix/NAPA Gold) are about $16 and probably better made than the OEM units............

[wvicary]

Stick with OEM.

[phillipj]

+1

[Johnny-5]

A lot of that has to do with were you buy them; OEM filters are expensive, quality aftermarket units (e.g.: Wix/NAPA Gold) are about $16 and probably better made than the OEM units............

Stick with OEM.

+1

Well I guess its official Ill just stick with OEM or equivalent! Thanks for the feedback! :thumbup:

[Sumflow]

Johnny-5, I am not in a position to say if you can or cannot feel an improvement using an aftermarket air cleaner on your Porsche. In my mind, to assume that you can, you also have to assume that the stock filters are in some way degrading and that Porsche knowingly provides air filters with their cars that are inferior. I do not have any basis or reason to substantiate these assumptions and they are not consistent with Porsche products.

Hot Rodders in California found that cotton filters increase horsepower because it breathes easier than paper, and cotton could be washed. In Europe BMC air filters are original equipment for the Ferrari Formula 1 team, and Ferrari GT race teams, and Porsche Motorsports, Mercedes Benz F1, and GT race teams, and AUDI motorsports team. The filtering material is cotton gauze soaked in low viscosity oil with a carbon fiber support structure for strength and weight.

Formula 1 teams would have done their own dyno tests, much more extensively than anywhere in the private sector. While we cannot expect them to release these results to each other, or us, the very fact that the results of their testing led to using cotton fiber in a formula one race, shows that the results must have beat whatever was in contention.

They make no claims about how much contaminates they remove and hold. But they say to wash them at every 15,000 km. Like mentioned earlier they are mainly concerned with low airflow restriction, and in this case withstanding the vibrations and heat produced in racing without having deforming problems in the filter.

For us the function of an air cleaner is to trap and hold dirt without restricting airflow. As the filter traps more and more dirt, airflow becomes restricted. New dry synthetic filters, "flow best, and restrict less.” Mobil 1 uses nano-fibers in Mobil 1 oil filters because they filter better. Synthetic nano-fibers replace stock oil wetted gauze, or foam conical air filters that is supplied with custom induction systems, as well as stock air cleaners.

To increase filter surface area and the volume of air entering the engine, Hot Rod systems often use a conical foam filter pointing toward the direction of airflow. Custom induction systems like those made by K&N using stock oil-wetted gauze or foam conical filters can be upgraded with the new synthetic filters.

Open these segments taken from a DVD in a new tab, and click the boxes on the left side. The K&N filter cotton filter requires cleaning/re-oiling every 50,000 miles. But if we could replace the stock filter with a more efficient synthetic nano-filter, there would be no need to oil the filter and screw with our sensors. Just vacuum the air cleaner when changing our motor oil.

The dry synthetic nano-fibers, are better for filtering air for the same reasons as for filtering Mobil 1 synthetic oil. Synthetic nano-filters theoretically filter better than paper, and will soon be standard equipment on high performance vehicles.

How can the replacement intake, or air cleaner, or anything, do better than a new original Porsche one unless the company dropped the ball on the engineering in the first place, or the materials have improved since then.

[judgejon]

A lot of that has to do with were you buy them; OEM filters are expensive, quality aftermarket units (e.g.: Wix/NAPA Gold) are about $16 and probably better made than the OEM units............

Stick with OEM.

+1

Well I guess its official Ill just stick with OEM or equivalent! Thanks for the feedback! :thumbup:

yes. good decision. what's to gain with the K&N? Horsepower negligible, sound negligible, asking for trouble with MAF and fuel system electronics...priceless.

(But....to be fair to K&N, a friend did put a K&N in his GMC pickup along with a monster exhaust that had twin pipes coming out from under the right side of the truck and it was actually pretty good. Idled like a gurgling speedboat engine, and fired up like a dragster. But.... this was a GMC, not a P-car with all the electronic bells and whistles.)