06redzx14
Pro
Posts: 1022
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posted May 12, 2009 12:04 PM
K&N filter modification
I'm looking for information about modifying a K&N filter for better flow. I remember seeing a post about it on another forum, but it is no longer available.
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06 alien head, no flies, PC+hub, 16/45 44 43, air shifter, dry shot
  
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dubious
Needs a life
Needs more time to ride!
Posts: 8442
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posted May 12, 2009 12:19 PM
The stock ones have a backfire screen, the K&N does not.
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natural selection.....
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LLcooljebb
Expert Class
Upgrade I Must
Posts: 146
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posted May 12, 2009 08:41 PM
 Edited By: LLcooljebb on 13 May 2009 04:41
Modify K&N by replacing with BMC! lol
Bump for modification info as well...I run a BMC, but alot of guys run the K&N (would be good info to have posted).
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"no time to be void or save up on life
you got to spend it all.."
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted May 12, 2009 11:49 PM
quote:
Modify K&N by replacing with BMC! lol
+1 
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'06 Passion Red ZX-14
*Lee*
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joemugg
Expert Class
Posts: 109
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posted May 13, 2009 06:53 AM
Speaking of air filter mods... What year did Kaw switch to a metal air filter door?
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'06 ZX14 blue, Muzzy M14/M10, flies out, BMC filter, PCIII, SpeedoHealer, Scott's Steering Damper, 16 tooth Vortex
'97 GSXR600 street sweeper
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WindSwordNinja
Expert Class
Posts: 203
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posted May 13, 2009 06:59 AM
I know my '08 has one but I don't know it that was the first year.
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2014 ZX14 Black and Green
2008 ZX14 Black and Red SE
1986 ZX1000R Black
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zxbob
Pro
Posts: 1692
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posted May 13, 2009 07:53 AM
I have never heard of a modification to a K&N filter. I do know guys were modifying
the stocker and the pipercross !
Bob
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Good parts aint cheap and cheap parts aint good !
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DogoZX
Expert Class
Posts: 348
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posted May 13, 2009 08:01 AM
Edited By: DogoZX on 13 May 2009 16:02
quote:
Speaking of air filter mods... What year did Kaw switch to a metal air filter door?
'08. The '06-'07 models have the crappy plastics ones. On a side note, I recently ordered one from Babbit's only to inquire four weeks later as to why it hadn't showed up yet and was told that they are on backorder. So I bought on from Schnitz. It was in stock and at my door in less than a week.
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masszx14
Pro
A mind beside itself!
Posts: 1806
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posted May 13, 2009 01:47 PM
quote:
quote:
Speaking of air filter mods... What year did Kaw switch to a metal air filter door?
'08. The '06-'07 models have the crappy plastics ones. On a side note, I recently ordered one from Babbit's only to inquire four weeks later as to why it hadn't showed up yet and was told that they are on backorder. So I bought on from Schnitz. It was in stock and at my door in less than a week.
I switched mine awhile back and showed up right away.
Good mod for a piece of mind 
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universal@mind
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JDC
Zone Head
Posts: 570
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posted May 13, 2009 04:26 PM
Edited By: JDC on 14 May 2009 02:14
quote:
I'm looking for information about modifying a K&N filter for better flow. I remember seeing a post about it on another forum, but it is no longer available.
If you are maning using the OEM placement, about the only thing you can do is have a K-N (cotton) filter or BMC. They flow the best you can get.
The only other option is to have more Sq inches of contact patch, which would mean re-doing your filter placement and maybe your intake top allow for more filter area.
Example: K&N's formula, sqaure or rectangular filter:
L * H * 6 (which includes the frame of the K&N filter) = CFM within 7-10
Now, before you go to that work to find out it made no meaningful difference, or very little difference, first get to the dyno, do a few pulls with the filter you have (say K-N), and then remove the filter and do a few pulls. You'll see if there is much difference without a filter (optimum flow at that setup). If there is a large difference, then it may make sense to do up a new filter.
I don't think you'er going to see much difference between a K&N on this bike and a mod'ed filter.
Other bikes, maybe, like the M109, a moded filter can make a huge difference - say 15-17 HP more, just for a max'ed out filter, Once you have a free flow pipe. Attribute 5 for the pipe, lets say = 22 HP gain total then. That bike requires quite a bit of mod'ing of the air box. and making up a one off filter. Doing that you can equal having no filters or no airbox in HP and TQ. The OEm filters flow about 143 CFM, of so, if I recall. The maxed out filter flows about 760-780 CFM.
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