1984special

http://www.modularpower.com/tech.html

Of coures it's on a Mustang, but still I think it makes a point against your statement. K&N filters are pretty popular, and for good reason. That's just one website, but K&N is everywhere cars are. The reason? They flow better than oem, they last, and they filter dirt.
That's not performance oriented? To each his own I guess.

Makenzie71

Did you prove a point? Because some mustang site said an aftermarket filter was a good investment you've made your case? I didn't see any comparison on that site...no metion of HKS, or Greddy, or A'pexi, or anything else...

karism

Ok...

Lets have a look at Apexi ,Hks,K&N and so on.

Who has been doing it the longest ?As far as i know K&N have ,i`am open for corrction if i`am wrong.

I feel more confident with K&N,than with HKS or whatever,seeing that they give a million mile warranty. Surelly you have to be able to back that up,if you go and put it on all your boxes and so ?

Just my 2 cents
Karis

RacerX7fb

Depending upon application and design.. paper filters may or may not flow better than a K&N...the issue with a paper filter is its inability to breath after a certain amount of use/time.. it simply gets clogged up whereas with a K&N this progression takes alot more time.. it continues to flow.
K&N air filters seem to have found their way all around the country being used by professional motorsport racing teams in sanctioning bodies like SCORE, SCCA, IMSA to across the globe in F1 cars.
Certainly there are other filters out in the market.. but until the leading rotary engine tuners like Racing Beat, Tripoint Engineering, Pettit Engineering, Mariah Motorsports, M2, etc. begin to restock their shelves with something else, K&N it is.

1984special

Yes it's just one website... and yes it's a friggin mustang website. Just showing you what's all over the internet. I plugged "K&N hp power gains" into the search engine and that's what it spit out. Along with a hundred other sites. Surely it must be a big conspiracy!

Look, you're the one saying K&N aren't performance oriented, in the face of all that evidence. They're practically all over the globe. I'm not saying Apexi is bad or anything, I'm just trying to figure out how you think K&N is "hardly performance oriented".

And if you want a comparison, you probably aren't going get it. HKS Greddy and Apexi dont' have a broad a consumer base as K&N. I'm sure you can see that.

What say you?



On a seprate note: RacerX7fb I love those wheels! Dark panasports sure do look good! Are they stock color or did you paint them yourself?

Makenzie71

http://www.mkiv.com/techarticles/filters_test/2/

The only professional test available. K&N just isn't as good as people consider it...they're just better than stock.

RitcheyRch

I know of a few people that have put them on other makes and models and the K & N filter messed up the oxygen sensor. It had something to do with the oil in the filter clogging up the sensor.

Rx7carl

I will only add this. Using the stock airbox and a stock carb, the K&N did flow more air than a new paper filter on my flowbench.

83gslRX-7

)But, if it's true that BMW will void your warranty if you use a K&N filter, and you're not insanely rich, just buy the BMW filter. I used to have an old 83 BMW 528e sedan. The thing was pretty damn good shape. I got it cheap, since it was a trade in at a dealership I worked at........but when I found out how much it would cost to have it repaired on small items, I just left the car in a parking lot with the key in the door.)

did this work cause im trying to get rid of my integra and i have thought of dropping it off in the ghetto and saying goodbye to being broke, hello to mods for my fb...

mar3

iTrader: (8)

Again, Car Craft did a magazine article with back-to-back flow tests of the various air filters and the K&Ns were better than OEM, period. The fact that it gets dirty means it's stopping dirt, so clearly it is filtering, right?

Wankelguy

Want more flow from a paper filter element? Get one that is the same diameter but TALLER than the stock unit. The lid will stick up a little, but the filter will seal fine, and the thing will flow like mad.

I did this on my Fiesta, and it works great.

Rx7carl

That would work on the 7 also, cause the box itself is VERY restrictive, pulling all the air thru that snorkel, especially the heat stove flapper.

revn247

http://theoildrop.server101.com/ubb/...ubb=forum;f=15

http://theoildrop.server101.com/ubb/...;f=15;t=000092


The first link is for air filters in general. The second is for the same topic on K/N.

I've used k/n's for years. Drop in/Cone.
The only way to know if dirt is getting thru is to do an oil analysis.

OR:

The cheap and easy way is the white glove test. Basically, change oil/filter. Be consitent w/ brands. Put in new air filter. Clean the intake tract MAF/AFM etc. Run for your oil change interval (3000 miles or 5000 miles) then use a white glove and wipe down the areas AFTER THE FILTER that you cleaned. Any dirt/dust etc. Repeat for anyother filter you want to use.

Another place to look for filter FLOW is
http://www.autospeed.com/cms/A_0629/article.html
Excellent article.

Just to give an example of k/n use. I have an 88 4Runner. K/N drop in since 75000 miles. Now has 288k miles. Same drop in. I do go offroad w/ it. Desert/mud/rocks. Motor has never been popped open.
We use a cone k/n on the EP 2nd gen I crew on.
Enough of the personal experiences.

Enjoy the reading and Happy Rotoring!

mar3

iTrader: (8)

This is a great idea! Coupled with a box on the hood like the old Ram Air Pontiacs, I'd bet some good numbers would come of this idea...

Then just toss on the stock one when it came to emissons day...

Rx7carl

Why not just get a better unit altogether? One that actually flows more?

Rx7carl

Excellent reading. Im gonna mount one of my U tube manometers in my FB this weekend. Itll be a good compliment to the flowbench, and the vacuum gauge I already use.

natew

iTrader: (1)

This is exactly correct.. Infact the dealer cannot "void" a warranty they can only deny claims on the warranty. That protects you from taking your car into the dealer because your AC doesn't work and having them tell you that your warranty is void because of your K&N filter. In addition they cannot deny a warranty claim simply based on the fact that you have an aftermarket replacable part on the car unless the dealer offers that part for free to any owner and it is readily available for free without going to the dealer, that way someone doesn't have to drive 200 miles to get their air filter from the dealer. So basically they would only be able to deny a claim if they could prove that the K&N filter damaged the engine, and if they do then you need to present their evidence to K&N and make K&N pay for the replacement engine providing you were using the filter that was recommended by them for your vehicle.

Also a dealer will say anything to keep a customer from bringing the car in for warranty work. Include trying to convince you that you will have to pay for the replacement part.. Why? Because when you bring your car in for warranty service the dealer only gets paid for about 50% of the labor which means they lose some money. But if they make you pay for it then they make money off the parts and extra money off the labor.

mfigr1

K&N Filters will outflow paper elements all day long. One way that you can tell it's good is by the number of companies have have tried to duplicate their filter. If you notice most of the air intake companies use a similar design except for the foam ones of course. I wouldn't be suprised if Apex and all of these other companies bought private label filters from them. Im sure that not all of these companies have the machinery to make their own filters. that costs lots of money.

Makenzie71

they may look similar but they're not. Apexi (it's "apexi"...not "apex"), greddy, HKS, etc. have completely different compasitions. That's why they all work differently.

No one's saying a K&N will not outflow a stock filter.

Manntis

I noticed increased throttle response when I put a K&N in Pamela. Can't say if it added horsepower as claimed, but there was a noticeble positive difference

honegod

if a K&N filter was improperly maintained it could allow excessive dirt into the engine.
unless BMW was to run a testing program on K&Ns and generate a proper maintainance procedure and schedual for official use there is no way for BMW to be assured that the K&N would be properly maintained.
so it seems reasonable to me that BMW would want to remove this possible uncontrolled source of failure from their cars.

it does not at all mean that BMW must hold K&N as inferior, merely that the additional maintanance REQUIRED by the filters is not adequately quantified for their teutonic **** retentiveness.

my 2 pfennigs

GtoRx7

iTrader: (5)

hmm, well here is my experience- I had a hks filter on my turbo II swap, and my motor cut out after 4k rpm and felt like it wasnt getting any power. Took it off and put on a KN filter, full power all the way up. I think something no-one brought up is the state of tune the car is in, If you have a mild modified car or stock, I think paper is fine, and KN flow s better. But the more Horsepower you add, the more air it breathes, and the paper will not support 400plus HP like a aftermarket filter will. And the extra dust is a small price to pay, considering your engine will die of something else besides dust at those levels. So I say it all depends what your in the game for.

Wankelguy

Interesting point.
Makes sense to me, being painfully aware of the Teutonic propensity for **** retentiveness, lol.