Anyone using K&N Filters?

Discussion in 'GS Boxers' started by Viper5112, Jan 10, 2017.

  1. MrGone

    MrGone Been here awhile

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    I only use them on my highly modified toys, I don't like the maintenance on the daily stuff vs regular paper filters (cleaning/oiling/flipping, then the additional mess they tend to make on the MAF and throttle body and intake walls). One less thing to worry about. And with the modified toys it's more of a packaging issue (I don't want to fabricate a sheet metal air filter housing to use a panel filter vs just slapping a cone on a 4" tube).

    IMHO the extra cost of the K&N vs a normal maintenance schedule with paper WIX brand filters is a moot point as well. It's really more of a break-even and I think if people did the math they actually spend more on a K&N over a 100,000 mile ownership period. Replacement Napa Gold paper panel filters are like $10-13 typically, a K&N panel is typically around $60 but even if you shop around and find one for $45, that's 3-4 filter replacements.

    Mileage improvement for cotton vs paper element filters for the same design is pretty moot, same with power improvements. Third parties have done flow tests on them on considerably higher output engines and it's minimal, translate it down to the displacement and output we are talking about here and it's even less. They are really more about sound and the psychological effect. When you change the intake design you can start to notice subtle differences depending on what you are doing but again it is very minimal. Still they are an inexpensive and low skill modification which makes them popular, well that combined with the tremendous marketing machine behind it.
    #21
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  2. ChasM

    ChasM Been here awhile

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    Not True.
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  3. GS Addict

    GS Addict Pepperfool

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  4. KiwiKurt

    KiwiKurt Amor Patriae

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    What a load of horse shit.

    having to clean sand out of your airbox isn't a good thing. Sand that gets past the filter has only one place to go: the engine. Please explain for us how having sand and dust particles in the engine is a beneficial thing???

    K&N's are fine for a "street" filter and they flow better. But their filtration utterly sucks. If you care about filtration, oiled foam is decidedly better and flows as well or better than the K&N cotton gauze style.
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  5. GS Addict

    GS Addict Pepperfool

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    It's not horseshit, that came right from K&N Tech support and is the principle of their product. The more trapped particles in the filter the denser the medium to block incoming contaminents.
    Thats why they don't want the filters cleaned until you can't see parts of the screen.
    Other filters work on that principal as well. (There is a point reached when flow is compromised - that when it's time to clean or replace)

    For the record I do not use K&N filters on my own machine and agree an oiled foam is far superior.

    .
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  6. KiwiKurt

    KiwiKurt Amor Patriae

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    :rofl

    i not laughing at you. Im laughing at them and anyone that believes that. I mean, yeah, i guess the dust that gets stuck to the filter DOES help filtration, which i guess is a good thing, because the filter doesnt do as much as it should. #marketinghype

    One trip through the desert will demonstrate why paper filters are not the way to go if you need to keep dust and sand and dirt out.

    used to be up for debate that KN style flowed better than foam, but i think that has been proven not to be the case. I guess these "sprint" filters are supposed to flow a bunch, and the S1000RR guys like them, but that is mostly track/dyno review. I havent seen or been able to find anything that tests their filtration.

    For "go fast" bikes, I understand...but for bikes/uses like ours, IMO filtration has to be part of the equation considered along with higher flow. MWR and UNI are the way to go imo.......
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  7. YesRush

    YesRush Been here awhile

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    Hey if you need a sales pitch your not gona say dust will make your boots fall off.If it is a pitch the dust assists filtration by means of one area full of dust the other areas of filter work as designed.Meaning it's doing its job.I guess I read through the lines.haha
    I bought OEM first thing after buying my 1150 with a kn.


    marketinghypeexactly
    #27
  8. MrGone

    MrGone Been here awhile

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    By the time a K&N has accumulated enough dust to reduce the pore size you're eliminating the reason for running a K&N so what you are talking about are effectively two different filters/you've closed the gap in performance between a cotton and paper filter. And don't just blindly forget about the cumulative particles that have made it through the engine before the filter has clogged enough to be a finer particle filter...

    Keep in mind this is quite overstated but still...
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  9. roger 04 rt

    roger 04 rt Long timer

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    From K&N's FAQ:

    1. How will a K&N filter affect my vehicle's fuel economy?
    K&N does not make any claims or advertisements regarding fuel economy.

    2. What increase in horsepower should I expect from a K&N replacement filter?
    K&N does not complete vehicle performance tests (dynamometer tests) for every application ...

    4. Can a K&N filter give my engine too much air flow?
    No, an engine can only draw in a certain volume of air depending on the engine's bore and stroke, and number of cylinders. A replacement air filter or performance intake system cannot physically increase the volume of air the engine takes in.
    #29
  10. KiwiKurt

    KiwiKurt Amor Patriae

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    ....but it can reduce restriction and allow the engine to reach close to max volume. Filters can and do make power improvements in many applications.
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  11. Dan Cãta

    Dan Cãta Long timer

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    I remember a thread here with someone clogging half the surface of the air filter on a 1200GS, replying that the performance is the same. PERHAPS it could be a issue if you were to suck more air into the engine and the paper filter would be the bottleneck, but that is rarely the case.
    I am not a fan either but I got as present a Wunderlich PC and the sport air filter, so I fitted it.
    So far, it works just fine.

    Dan.
    #31
  12. def

    def Ginger th wonder dog

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    Air filter performance is easily determined with a UOA which includes a measurement of silica.

    There are many write ups on K&N air filters and their performance. Most of the facts support the use of the OE air filter related to flow and filter efficiency.
    #32
  13. Snks

    Snks Been here awhile

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    All I can say and some have said it before if your a street bike rider not going into the dirt the K & N air filter should be OK. They likely provide a little more punch. But after riding dirt for more than I would like to admit they take dust in the motor in the dirt and I would not use one in my bike.
    #33
  14. jetwhine

    jetwhine Been here awhile

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    I agree it a reusable filter, in the long run it is supposed to save you money. As far as using them on an Adventure bike?????????. Street use only for me.
    #34
  15. def

    def Ginger th wonder dog

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    In todays modern engines, fuel is metered based upon the fueling map stored in the ECU. Remember, the energy comes from the fuel, not the air. Therefore, admitting more air does not equal more power unless additional fuel is added to the additional air. And while carburetors often provided more fuel if air flow was increased, this is not necessarily the case with our fuel injected engines.

    I see the trade off as follows;

    Install a K&N, admit more air (maybe), admit more dirt, make more intake noise, increase maintenance, spend more money. Notice I left out make more HP.

    I don't use 'em.
    #35
  16. gusable

    gusable Been here awhile

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    In all the filtration tests I've ever seen a double foam /tacky oil filter has the best filtration but with some flow loss. Off road- it's the best. I had an amsoil version on my car once. I don't know if they make bike filters
    #36
  17. KiwiKurt

    KiwiKurt Amor Patriae

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    Here is a KTM changing 10% power at the tire doing nothing other than a filter change:

    http://advrider.com/index.php?threa...-super-adventure.1117112/page-3#post-28894924


    BMW S1000RR gaining 7hp with the only change being a MWR oiled foam air filter from stock paper filter. this is just one of many, many examples.

    http://tinypic.com/view.php?pic=2zgaxie&s=6


    They can and do make power. How much depends on the application. Again, I dont know much would it would make a difference (if at all) on a stock GS, but by the time you remove the ignition spark retard from 7700-8000ish rpm, an exhaust, and remap the ECU, the improvement will be there.
    #37
  18. GETTHUMPER2

    GETTHUMPER2 Been here awhile

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    Hi GS,,,I will concur, the oiled gauze will actually catch smaller particulate after it has been used a bit and is partially loaded, However, in extremely dusty conditions the oil will tend to "dry-up" a bit and loose some of it's "tackiness", so after a particularly dusty ride manually knocking off any loose dirt from the outside surface, by lightly tapping it while the dirty side is facing down, and then a quick light spray of oil is all that is needed.
    #38
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  19. manfromthestix

    manfromthestix Lost in Space

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    This has been my experience too, don't over-clean it and it works fine and lasts forever. I have them in my two BMW bikes, my 4X4 truck, and both cars and have never had an issue. I can't say whether they enhance performance or gas mileage.
    #39
  20. bauerboy

    bauerboy Been here awhile

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    I have a free K&N I just took out of my 2011 1200 GSA for someone in Northern CA to come get. I can even do a reasonable ride and meet. IMG_1053.JPG
    #40