K&N Filters?

[VaSteve]

I read the for sales ads a lot and I see that a lot of cars are advertised as having K&N filters. Since I don't know, is there something special about them? I mean it's a filter right, not a major upgrade. Is there more to it?

I guess this post made me finally decide to ask: (thanks!)

Originally posted by Lothar
With my new cool collar, I'll be kickin' your butt! Uh...did I mention I have a K&N filter too?

[B D]

Just took mine out of my air box, I believe the fit was not to good and was letting things get by. It was on there for a while and had very little dirt in it. It was the cylinder shape style

On another car I loved it, it was the cone type and replaced the whole box, not sure about performance but it gave the car a better light grumbling sound under power.

Just my 2 cents.

[fireant911]

I remember reading a similiar post a few months back and a Pelican member was suggesting that to clean inside the airbox and reinstall the K&N filter, drive the car for a while in a dirty environment (dirt road), and remove the filter to reinspect.

My car had just had a K&N filter installed by the previous owner so I did this test and I was shocked by the 'dirt and crap' that managed to get past the filter in a relatively short time. I immediately ordered a Mahle filter (from Pelican) and everytime since when I remove the filter the area behind it is surgical room clean.

The expensive K&N filter went into the trash - it's Mahle for me!!!

[vash]

i think the only bonus is that it is re-usable. they may flow better, based on that display all the autoparts stores have on their counters, but i think other things on our cars govern how much air gets through. on my car, it is the air sensor plate.

[Doug Zielke]

Originally posted by fireant911
I remember reading a similiar post a few months back and a Pelican member was suggesting that to clean inside the airbox and reinstall the K&N filter, drive the car for a while in a dirty environment (dirt road), and remove the filter to reinspect.

That "member" would have been me.
K&N filters do actually flow more air. So will no filter element at all!
Stay with your OEM paper filter. Your rings will appreciate it.

[john70t]

A link from the archives which showed KnN was worse than stock:
http://www.seansa4page.com/resource/airfilter.html
It was also mentioned the oil could contaminate the airflow sensor.

Another on oil filters:
http://www.frankhunt.com/FRANK/corvette/articles/oilfilterstudy/oilfilterstudy.html

[onewhippedpuppy]

There's a reason they flow more than stock, they let more crap through as well. It's hard to improve on original Porsche without lots of $$$, the mechanic who did my PPI said that he dyno'ed an early engine with the original (ugly) airbox, and the much cleaner watershield air cleaners, the OE ugly box made more HP. Keep the paper, save for that 3.6!

[Par911]

Anyone ever used the green air filters? They claim to increase HP by 6.7% over stock paper filters, have greater air flow, and better fuel mileage.
http://www.needforspeed.co.uk/green/index.htm
http://www.carxpressions.com/performance/green_filters.htm

[350HP930]

Growing up with motorcycles for most of my life I have dealt with a lot of oiled fabric filters, foam filters and paper filters operating in harsh environemnts.

I have seen first hand the major difference first hand that having an unoiled and underoiled filters can have on filtering quality. I have also seen cases where people thought regular engine oil is suitable filter tack material.

If you properly maintain a K&N (or any other type of fabric filter) then it will do what it is supposed to which is flow lots of air and keep the damaging particles from passing through your engine.

Whenever I see theads like these with negative comments from people expecting them to be an install and forget item I think I see where they get their results from.

An oilable filter needs to be serviced at least once every thousand or miles or so if you expect it to catch the smaller particles.

Pores keep out the big stuff but it takes the tack material to get the small stuff as the air zig zags though the cloth material.

If you wern't frequently washing and retacking your filter then the tack is ineffective and you are the one to blame for the ineffective nature of your filter. If you don't have the cleaning and oil kit you shouldn't even have one. The same rules apply to foam filters as well

If you want a no maintenance disposable filter then stick to paper but when you have a limited filter area oil labrinith filters will always outflow paper.

[dhoward]

EXACTLY what 350 said....

Originally posted by onewhippedpuppy
There's a reason they flow more than stock, they let more crap through as well. It's hard to improve on original Porsche without lots of $$$, the mechanic who did my PPI said that he dyno'ed an early engine with the original (ugly) airbox, and the much cleaner watershield air cleaners, the OE ugly box made more HP. Keep the paper, save for that 3.6!

I'd like to see that dyno strip.

[Bill Verburg]

Some interesting and relevant info here

[Bill Verburg]

and here

[jmohn]

Two "K&N" filter questions on the same day. It must be close to spring and we've all forgotten how to do a search.

K&N filters ... use them if you want but don't expect any performance improvement (and, if you don't service them often and correctly, do expect dirt in the engine).

Jerry M
'78 SC (OEM air filter, thank-you)

[SRISER]

Let's see...rebuild my engine due to all the crap the K&N let by or live without the "performance" gain...

[350HP930]

Like I said, if you are not willing to regularily clean and oil (with filter oil) your filter then don't use foam or fabric air filters.

Just because the filter can last 100,000 miles does not mean they don't need servicing. Just like with engines you need to change their oil.

[1fastredsc]

Just out of curiousity, who here would drive their 911 on a dirt road?

[B D]

All True, but if they don't have an air tight fit in your air box it doesn't matter what you do. Makes sure it sealed, and able to trap the crap.

[B D]

Just out of curiousity, who here would drive their 911 on a dirt road?

Not mine, but I'll drive yours

[1fastredsc]

Your welcome to, but you may have to cut out a hole in the floor and flintstone your way around until my motor goes back in

[RoninLB]

Originally posted by 1fastredsc
Just out of curiousity, who here would drive their 911 on a dirt road?

Guess Who ?

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