Some Guy
Expert Class
Posts: 144
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posted October 18, 2009 08:39 AM
BMC vs K&N
At nearly 19,000 miles, I'm changing my Air Filter. Is that good or bad? Just looking for thoughts and opinions. My home is on a hill with a gravel driveway, so there is some dust to consider. I don't race it but love to romp on it.
So, what to get. Stock? BMC? K&N?
Naturally, I have Brocks SMEG w/ PCIII. So mapping shouldn't be too much of an issue.
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'08 SE ZX-14
'14 1000r Ninja (wife's)
1985 900 Ninja
  
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eklipse636
Needs a life
ZX-14
Posts: 6046
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posted October 18, 2009 09:05 AM
With you putting that many miles on it I def would go with bmc or k n. I've heard good about both!
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Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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Douglas Home
Zone Head
Posts: 710
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posted October 18, 2009 09:58 AM
BMC street is the ducks nuts!!!
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Doug Mackay Australia
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LAB3
Needs a job
Posts: 2977
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posted October 18, 2009 10:22 AM
I have used K&N for 30 years. I like how long they last :-) I have the same K&N on my
96 Corvette for 10 years and 90,000 miles. Still cleans up like new.
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derpie
Expert Class
Dont judge a book by its cover
Posts: 269
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posted October 18, 2009 10:24 AM
Did you run the stocker for 19k ?
quote:
At nearly 19,000 miles, I'm changing my Air Filter. Is that good or bad? Just looking for thoughts and opinions. My home is on a hill with a gravel driveway, so there is some dust to consider. I don't race it but love to romp on it.
So, what to get. Stock? BMC? K&N?
Naturally, I have Brocks SMEG w/ PCIII. So mapping shouldn't be too much of an issue.
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Bently
Needs a life
2012 14r In Blue and no Mods!
Posts: 5428
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posted October 18, 2009 10:37 AM
If your not after max hp and want a good filter go with the k&n it will be fine.
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Some Guy
Expert Class
Posts: 144
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posted October 18, 2009 10:55 AM
 Edited By: Some Guy on 18 Oct 2009 18:57
_______________________________________________________________________
Did you run the stocker for 19k ?
______________________________________________________________________
Yea, for work I'm on the road a lot and use the 14 whenever weather permits and I don't have to carry anything. Time flew by this year and I never got around to changing the filter. I wanted to post something here for feedback. I've searched the posts and haven't seen a clear favorite between K&N and BMC, so I thought I'd throw it out there. It probably wont' make too much of a difference. I guess, like everyone else, I'd want to get the most HP without risking my engine by allowing dust inside. My wheels have a thin coat of dust by the end of the week. Actually, I clean off more dust then I do chain oil, and I do oil my chain more than once a month.
BTW, here is a pic of my Brocks pipe. I've been wanting to email them and ask if this is normal. This is what it looks like by the end of, let's say, a 500 mile week or ride. Seems excessive to me. Also, note that the Noise Reduction plug was a glossy black when I bought it. (Bummer, the pic showed chrome, didn't get what I expected). Now it's bronze in color....
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'08 SE ZX-14
'14 1000r Ninja (wife's)
1985 900 Ninja
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Bently
Needs a life
2012 14r In Blue and no Mods!
Posts: 5428
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posted October 18, 2009 11:25 AM
That's how my pipe looks as well, no big deal normal to me.
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derpie
Expert Class
Dont judge a book by its cover
Posts: 269
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posted October 18, 2009 01:57 PM
Wow ok
quote:
_______________________________________________________________________
Did you run the stocker for 19k ?
______________________________________________________________________
Yea, for work I'm on the road a lot and use the 14 whenever weather permits and I don't have to carry anything.
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smokinZX14
Needs a life
Posts: 10197
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posted October 18, 2009 03:08 PM
BMC that is all i have to say ...
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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68gts2
Zone Head
hobbies ( Beating you !!! )
Posts: 927
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posted October 18, 2009 03:42 PM
I have been a k&nguy for years,but I just purchased a bmc race and its a really nice filter as well.
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Chromed-out,in the dirt 08SE with all the good stuff!!!
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02zx12rbob
Expert Class
Posts: 496
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posted October 18, 2009 05:52 PM
BMC on the street here.
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted October 19, 2009 11:25 AM
quote:
BMC that is all i have to say ...
+1 BMC is all that matters!
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'06 Passion Red ZX-14
*Lee*
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted October 19, 2009 11:27 AM
K&N is known to actually lose power over the stock filter!
K&N is good for cars thought cause they got way more filter area than us to flow the right amount of air.
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'06 Passion Red ZX-14
*Lee*
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted October 19, 2009 01:06 PM
I have a pipercross race. It's worked for me and comes with an unconditional lifetime warranty. I like that! Also, I don't think anything could be anymore close to no filter, as you can almost see through this thing. They also have a street filter if that is more your style.
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Bluebyyou
Expert Class
Gettin My Curve On
Posts: 276
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posted October 19, 2009 02:05 PM
I changed my dirty O.E.M. paper filter @ 9.5K. miles. I then installed a BMC race. I've removed and banged out the debris 3 or 4 times and recently washed it out and recharged it @ 23K. BMC or K&N are very similar it's probably a toss up on which one to use.
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2007 Bad to the Bone ZX-14 flies out, full Muzzy exhaust system, PC III, BMC race
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Pretty Fast
Expert Class
Posts: 116
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posted October 19, 2009 02:58 PM
BMC Race is what I run.
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted October 19, 2009 04:24 PM
BMC or nothing if you ask me.
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'06 Passion Red ZX-14
*Lee*
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LAB3
Needs a job
Posts: 2977
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posted October 19, 2009 04:45 PM
quote:
K&N is known to actually lose power over the stock filter!
K&N is good for cars thought cause they got way more filter area than us to flow the right amount of air.
Only if you over oil them. Bike or Auto if you use too much spray oil in cleaner kit
it traps more dirt and you lose about 2 HP. We did this test at D&D Exhaust back
in 1998 on my new ZX-9R.
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted October 19, 2009 04:50 PM
quote:
quote:
K&N is known to actually lose power over the stock filter!
K&N is good for cars thought cause they got way more filter area than us to flow the right amount of air.
Only if you over oil them. Bike or Auto if you use too much spray oil in cleaner kit
it traps more dirt and you lose about 2 HP. We did this test at D&D Exhaust back
in 1998 on my new ZX-9R.
Of course but when properly oiled still the stock beats the k&n.
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'06 Passion Red ZX-14
*Lee*
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Flame On
Needs a life
Fuel Air & Spark
Posts: 17104
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posted October 19, 2009 05:16 PM
They are both good cleanable and reusable apples to apples BMC makes a thinner one also for more flow less filtering . If you want a good long lasting filter go K&N if you want all out race get the BMC thin layer filter.
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77 RD 400
80 GS1000 GT
06 ZX14
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LAB3
Needs a job
Posts: 2977
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posted October 19, 2009 05:20 PM
Lee I worked at D&D Performance Exhaust for many years. We had a Super Flow Eddy Current Dyno and matching Flow bench. We tried the K&N and OEM test on my ZX-9R
no Loss in HP. There are other filters that may flow more air (race filters) when you can see thru them. But for the street a K&N will NOT cost HP over stock. At lest on my ZX-9 it did
not hurt it. Not trying to be a know it all, but been there done that. 40K in a Dyno and flow bench was best on the market back then. We were a K&N dealer and Royal Purple back
then. Just saying what I saw on a new Dyno. No way I use Any filter I can see thru for a street bke that I will ride 50,000 miles.
Louis
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Flame On
Needs a life
Fuel Air & Spark
Posts: 17104
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posted October 19, 2009 05:22 PM
Of course but when properly oiled still the stock beats the k&n.
I find that hard to believe the stock came with a metal screen that was huge most riders removed it to help flow . Basically the stock air filter is a throw away once dirty
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77 RD 400
80 GS1000 GT
06 ZX14
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LAB3
Needs a job
Posts: 2977
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posted October 19, 2009 05:44 PM
Not being a smart ass but have you worked at shop with a expensive Dyno and really watched this being done? A new Stock throw away filter did Not make more HP then a K&N
on this test on that ZX-9R.
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted October 19, 2009 06:25 PM
quote:
Not being a smart ass but have you worked at shop with a expensive Dyno and really watched this being done? A new Stock throw away filter did Not make more HP then a K&N
on this test on that ZX-9R.
Yes I've seen it at my buddys shop with my 14 and it happened on my other buddies blackbird. 10hp loss on the blackbird and almost 8 hp with mine . It's not the same results with all bikes I know but I'm done with K&N.
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'06 Passion Red ZX-14
*Lee*
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