Author Topic: To K & N Air Filter or Not?  (Read 3997 times)

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Offline smooth_operator

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To K & N Air Filter or Not?
« on: March 18, 2013, 03:39:03 am »
Looking for some opinions folks.

I know K & N's are reusable but are they as good as a conventional filter for protecting the system from impurities?
Which do you use and why?

Thanks in advance for the vast amount of advise that I'm sure will be coming shortly!!!
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Offline Bruiser

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Re: To K & N Air Filter or Not?
« Reply #1 on: March 18, 2013, 03:55:31 am »
Hey Smooth!  I have K+N in all my vehicles, except my new C14, which I plan to change soon.  When I put one in my old C10, I noticed a diff right off the bat as far as giddyap, no to mention, ease of cleaning and reusing it, plus it increased my mileage.
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Offline The Pope

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Re: To K & N Air Filter or Not?
« Reply #2 on: March 18, 2013, 09:04:54 am »
I know K & N's are reusable but are they as good as a conventional filter for protecting the system from impurities?
Which do you use and why?

In test results that I have seen, the OEM filter protects the system from impurities better. This is why I'm still running the OEM instead of the K&N (or any other aftermarket air filter).
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Offline Kman

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Re: To K & N Air Filter or Not?
« Reply #3 on: March 18, 2013, 09:24:46 am »
In most empirical studies that I've seen for K&N vs. OEM air filters (not Concours specific),  some  negligible  flow improvements where observed but particle protection was significantly lower.  Also, if the K&N element is over-oiled during cleaning, it may have a detrimental impact on FI sensors.  So to me, the potential pitfalls are not worth the possible benefits. 
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Offline Gypsy JR

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Re: To K & N Air Filter or Not?
« Reply #4 on: March 18, 2013, 09:42:25 am »
Brock Davidson of Brock's Performance tested OEM, K&N, and one other brand aftermarket filters. He tested on a dyno, and to see how quickly the filter got clogged from use, and to see which let the least amount of particulates through.

The OEM filter won hands down, in every category. The K&N filters, even the so-called "race" version, provide no increase in HP nor in torque on otherwise stock ZX14 engines. 
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Offline Brass

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Re: To K & N Air Filter or Not?
« Reply #5 on: March 18, 2013, 10:48:43 am »
In most empirical studies that I've seen for K&N vs. OEM air filters (not Concours specific),  some  negligible  flow improvements where observed but particle protection was significantly lower.  Also, if the K&N element is over-oiled during cleaning, it may have a detrimental impact on FI sensors.  So to me, the potential pitfalls are not worth the possible benefits.

+1
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Offline stevewfl

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Re: To K & N Air Filter or Not?
« Reply #6 on: March 18, 2013, 10:52:25 am »
the stockers have always worked well in my bike....for around 25,000 miles or so each.  Although the stockers don't appear healthy upon removal

Old filter:



new replacement:



KiPass!

Offline Don557

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Re: To K & N Air Filter or Not?
« Reply #7 on: March 18, 2013, 01:07:10 pm »
 I was a dedicated K&N user for years, but after reading up on the subject, I've recently gone back to OEM on most vehicles.  The paper just plain works better than cloth (cut point and efficiency), and as mentioned above, there's the potential to over-oil the K&N. 
Be sure to shop around though - the price on OEM units varies widely.  The last one I got was from cheapcycleparts.com, about $40 or so if remember correctly.  I think the dealer will bang you about $60 or $70.  Any way you cut it, more money in the long run than reusable, but still cheap insurance to keep the C14 breathing clean air.

Offline CW

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Re: To K & N Air Filter or Not?
« Reply #8 on: March 18, 2013, 01:20:18 pm »
I use OEM filters in all my vehicles...it's not that big of an expense anyway, and I grew tired of cleaning and re-oiling the K&N type. Besides, OEMs work better...plus, the best reason of all, it's just EASIER to use OEM.

I like easy.
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Offline Mac

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Re: To K & N Air Filter or Not?
« Reply #9 on: March 18, 2013, 06:09:48 pm »
I have a BMC filter that I got from Fuelmoto when I ordered My PCV and Area P slip on, and while it's a quality reusable filter, it's proven that the cotton filters do not clean the intake air as well as a stock filter. However, the package they offered was a good deal, and it's nice to not have to buy a filter. The difference in particulates isn't enough to harm the engine. I'll give more info at 300 thousand miles. LOL

Offline G

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Re: To K & N Air Filter or Not?
« Reply #10 on: March 18, 2013, 07:30:51 pm »
I use to have a BMC filter on a 2000 Hayabusa ,and while it did increase the hp 3.7 hp (tested on a dyno) it did allow more dirt to pass than i was comfortable with,so went back to stock. Ever since then i have stuck with stock. ;D

Offline Gypsy JR

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Re: To K & N Air Filter or Not?
« Reply #11 on: March 18, 2013, 08:28:00 pm »
I use to have a BMC filter on a 2000 Hayabusa ,and while it did increase the hp 3.7 hp (tested on a dyno) it did allow more dirt to pass than i was comfortable with,so went back to stock. Ever since then i have stuck with stock. ;D

Yes, the Hyabusa tunes radically different from the ZX14, and it is the ZX14 engine we are concerned with here.

Like I said, no less than Brock Davidson did the tests at Brock's Performance and found negligible improvements from even so-called "race" filters on the ZX14 engine.
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Offline devilboy

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Re: To K & N Air Filter or Not?
« Reply #12 on: March 18, 2013, 09:21:30 pm »
In most empirical studies that I've seen for K&N vs. OEM air filters (not Concours specific),  some  negligible  flow improvements where observed but particle protection was significantly lower.  Also, if the K&N element is over-oiled during cleaning, it may have a detrimental impact on FI sensors.  So to me, the potential pitfalls are not worth the possible benefits.

Forget about the F1 sensors  if you over oil the filter you will choke your bike badly....
Don't ask me how I know.... not on my Connie but my  Vision.
You definitely get a better airflow and I can hear them throttle bodies sucking down all the air they can get....

Offline Cboothe

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Re: To K & N Air Filter or Not?
« Reply #13 on: March 18, 2013, 09:43:49 pm »
ive always used k & N in everything I figure since its reuseable it should pay for itself over time since the oem filter is between $40 and $60 I got my K & N from autozone for $69, it sure was a tight fit but it fits nice and shouldnt have to remove for a while, my question is in cars you are supposed to wash the k & N every 50,000 miles where the c14 says to change filter around 11,000 miles, does this mean next time I have to clean the filter is 50,000 miles I do know that at 11,000 the oem filter was pretty bad,

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Offline Russ

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Re: To K & N Air Filter or Not?
« Reply #14 on: March 18, 2013, 10:17:21 pm »
I wont put a K&N in anything...  I've got twin turbo's on my Dodge truck with a Cummmins engine.  The only filter that will work with that setup I've found is a K&N like oiled cone filter.  I have to remove all the piping to change the oil filter and get to see what the inside of the intake plumbing looks like with that kind of filter.  It's always a mix of oily dust inside the intake. 

I'll stick with a stock Kawi filter thanks...

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Offline Don557

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Re: To K & N Air Filter or Not?
« Reply #15 on: March 18, 2013, 10:17:54 pm »
I had to order valve shims today so I got 2 OEM air filters on the way too.  Less than $34 ea at cheapcycleparts.  I changed the original at 10K and it was pretty dirty.  I'm going to drop to 5K intervals and see how it goes.

Offline G

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Re: To K & N Air Filter or Not?
« Reply #16 on: March 19, 2013, 02:37:08 am »
I use to have a BMC filter on a 2000 Hayabusa ,and while it did increase the hp 3.7 hp (tested on a dyno) it did allow more dirt to pass than i was comfortable with,so went back to stock. Ever since then i have stuck with stock. ;D

Yes, the Hyabusa tunes radically different from the ZX14, and it is the ZX14 engine we are concerned with here.

Like I said, no less than Brock Davidson did the tests at Brock's Performance and found negligible improvements from even so-called "race" filters on the ZX14 engine.
Yes, I understand we are talking about the zX14 engine, Just wanted to  put forth my 2 bits about the lack of filtration of K&N style filters. And i also had a Zx14 that i use to dragrace and mod,And i also found out that the stock worked as well as aftermarket with better filtration ;D 

Offline Bruiser

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Re: To K & N Air Filter or Not?
« Reply #17 on: March 19, 2013, 03:29:57 am »
CBoothe, 50K??  NO, NO, clean that puppy about every 3 months, and use very little oil.  I have K+N in my Tahoe, and my Maxima, and after several years, they both look like new (the filters). 
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Offline ZG

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Re: To K & N Air Filter or Not?
« Reply #18 on: March 19, 2013, 04:17:36 am »
I always run K&N air filters in my bikes.  :great:
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Offline R Nelson

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Re: To K & N Air Filter or Not?
« Reply #19 on: March 19, 2013, 11:15:22 pm »
People are always passionate about their air filters. I personally don't know if there's a wrong filter as long as you change/clean them regularly. FWIW I run OEM filters in my bike but have had a K&N in my truck for 100K miles and have had no issues with either vehicles. I will say ever time I clean my K&N filter I feel like a saved $25 and am always impressed with how clean it is when I'm done. Looks like new.
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