black.lude
Well-known member
Hi, Is it a waste of money to go with aftermarket? Shall I stick with stock? not that it matters but its for an 05 gsxr750
Your input is appreciated.
Your input is appreciated.
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K&N / BMC vs OEM air filters
- Thread starter black.lude
- Start date
My personal experience with K&N.The bmw airhead i had years ago used $50 oem filters.The airbox was always spotless under the filter using the oem.Because of the cost and the 100km drive to the nearest dealer,i bought a $100 K&N.After about 20,000km i checked the filter and found the airbox covered in a very light film of grit.The oil from the filter gave the grit something to stick to on the inside of the airbox.But the point is,there was never anything there before,other than a tiny bit of cranckcase oil from the breather.Never any grit!
Bottom line is.Clean engine is longer lasting engine.I would rather buy paper filters than rings and valve guides.But i'm not a mechanic.Maybe Ken can chime in.
frekeyguy
Well-known member
my old srad always had a KnN in it. never had an issue with grit comming into the airbox through. 80k on that motor and ran like a champ.
used KnN's go for $50 + $15 rechage kit = life time of use. But you gotta keep it clean.
bobjohnson
Well-known member
This is the way I'd look at that situation... Seems like the K&N was keeping the dirt OUT of the engine, while the OEM paper filter was letting it go right through, hence it not being in the airbox... most of the time dirt would settle at the bottom... if its not there, its either on the filter itself or in the engine...
Gryphon
Well-known member
Amen.
You don't want hundreds (thousands!) of used paper filters piling up in landfill, do you?
It's a different world, and 'disposable' is not cool.
Actually, the more dirty the filter, the more efficient it filters the air. Think of your kitchen sink with the sieve. The more clogged it gets, the less particles can go thru.
This however blocks the passage of the filtrate, ie. air for the engine.
For some odd reason, both my gsxr's have had bad seals around the air filter. I can't seem to properly seal around the air filter. There seems to be grit around the throttle body area.
wBw did a big write up on the K and N.
The entire article is here.....
http://www.webbikeworld.com/t2/k-n-air-filter/
Here is a case study they did from 2009 on a K&N filter in a cage by a mechanic with many years experience and ripping open a car engine.....
UPDATE: Case Study - July 2009
Recently, I had the opportunity to have the cylinder heads off of a customer's car for an emissions control failure air injection) and it happened to have a K&N air filter, so I decided to take a closer look.
With some of the responses from our readers I thought I would pass on my observations.
Stats:
Note: Our MAS are VERY sensitive to ANY contamination whether liquid or solids! We are frequently replacing MAS for fuel adaptation values that have turned on the "Check Engine" light.
The adaptation values on this car were perfect!
My Findings: I found NO traces of oil or dirt of any kind anywhere in the intake system or on the MAS. Everything was clean and dry.
I found NO scratching or scoring on the cylinder walls.
Conclusion: This was not a scientific test, just what I observed while the engine was apart. It does though, throw some doubt, in my mind, of the claims made by some that using a K&N air filter can cause damage to a MAS or the motor itself.
The entire article is here.....
http://www.webbikeworld.com/t2/k-n-air-filter/
Here is a case study they did from 2009 on a K&N filter in a cage by a mechanic with many years experience and ripping open a car engine.....
UPDATE: Case Study - July 2009
Recently, I had the opportunity to have the cylinder heads off of a customer's car for an emissions control failure air injection) and it happened to have a K&N air filter, so I decided to take a closer look.
With some of the responses from our readers I thought I would pass on my observations.
Stats:
- 1999 M-Benz E-320 with 187,000 miles and no oil consumption complaints.
- V-6, M-112 ,3.2 liter motor with aluminum heads & block & automatic transmission.
- Closed loop, HFM fuel management system using a Mass Airflow Sensor ( MAS)
- K&N filter was installed by his son about 100,000 miles prior to my repairs & he's not sure when the last time it was "cleaned".
Note: Our MAS are VERY sensitive to ANY contamination whether liquid or solids! We are frequently replacing MAS for fuel adaptation values that have turned on the "Check Engine" light.
The adaptation values on this car were perfect!
My Findings: I found NO traces of oil or dirt of any kind anywhere in the intake system or on the MAS. Everything was clean and dry.
I found NO scratching or scoring on the cylinder walls.
Conclusion: This was not a scientific test, just what I observed while the engine was apart. It does though, throw some doubt, in my mind, of the claims made by some that using a K&N air filter can cause damage to a MAS or the motor itself.
black.lude
Well-known member
Thanks for all your input.
I decided to go with the OEM because it lasts longer ( 2-3 times longer than aftermarket) and it will catch more dirt which means less garbage in your engine.
Even though I will be able to clean the aftermarket filter, the cleaning kit is 20 bucks plus its a hassle .
Thanks
I decided to go with the OEM because it lasts longer ( 2-3 times longer than aftermarket) and it will catch more dirt which means less garbage in your engine.
Even though I will be able to clean the aftermarket filter, the cleaning kit is 20 bucks plus its a hassle .
Thanks
LOL try riding a dirtbike that has to be cleaned every ride. I would say neither way was a mistake but for me having two bikes (one with a BMC the other K+N) neither seems to work better then the other and for me cleaning two filters every year is easier and cheaper than buying them.
Since when do OEM filters last longer?
hotshotmikeyboy
Well-known member
ive noticed different results in performance from different bikes with a k&n filter from stock filter. biggest difference was with an 07 sv650. the factory filter was very restrictive compared to the k@n. the factory filter was a paper filter/mesh/perforated metal back fire plate. i had an f4i and felt a lil difference. surprisingly with my cbr 1000 i didnt feel or hear any difference. and on my 08cbr 600 i didnt notice much either. i had a gsxr 750 and a 600 and didnt notice much just with sound i noticed it a bit. my harley roadking noticed better throttle responce and better milage.
in terms of getting a k@n so you dont have to ever change your air filter element......i really dont ever see much guys doing more then 20000km on there bikes any more, they usually get bored and purchase another bike before then. only a few guys on here actually keep their babies for a long time and put big time miles on them.
in regards to dirt gettings past the filter i have never had any problems with my bikes or any bikes that i have installed them on with the k@n
in terms of getting a k@n so you dont have to ever change your air filter element......i really dont ever see much guys doing more then 20000km on there bikes any more, they usually get bored and purchase another bike before then. only a few guys on here actually keep their babies for a long time and put big time miles on them.
in regards to dirt gettings past the filter i have never had any problems with my bikes or any bikes that i have installed them on with the k@n
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