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  • K&N Filter performance?

    My kids wouldn't even believe I am asking this....

    Has anyone had any measurable improvement of mileage or power improvement from adding a K&N filter only, or the whole cool air intake?

    I am looking to improve the highway range of my 2002 GX.

    Thanks

  • #2
    Re: K&N Filter performance?

    I put one (K&N Filter) on my '99 GX and notice a big difference when you punch it hard.
    I'm getting a marginal increase in mileage.
    It was only 40$ and you only have to replace it after a million miles!
    Last edited by jetboatjohnny; 05-21-2008, 05:52 PM.
    BLUE 09 GX

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    • #3
      Re: K&N Filter performance?

      Thanks.

      I read somewhere that Honda redesigned the air box around 2000 or 2001 and improved to low and midrange tourqe. I wonder if I would get as much improvement as the 99. But, I guess it might be worth a shot...

      As you say it should last a long time.

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      • #4
        Re: K&N Filter performance?

        I got one too on my 99 and you can feel the power difference. Mileage wasn't that noticeable.

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        • #5
          Re: K&N Filter performance?

          I am considering getting a K & N. Does anybody have documented evidence of power increase? I am guessing it is there, but the reason the mileage doesn't increase much is because you use the extra power a lot. I would.

          I have a question for anyone who may have used a K & N for a period of time.

          On the diesel websites, there were reports of dirt on the intake. This apparently is from the oil used on the filter drawing into the intake, which is to be expected, but dirt that was not filtered also pulling in and sticking to the oily spots.
          I am not putting the filters down, but am asking if anyone has any sign of dirt getting past the filter and sticking to the oily spots. I want to buy one of these, but want to be sure.

          Thanks,

          Max

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          • #6
            Re: K&N Filter performance?

            On the diesel websites, there were reports of dirt on the intake. This apparently is from the oil used on the filter drawing into the intake, which is to be expected, but dirt that was not filtered also pulling in and sticking to the oily spots.
            I am not putting the filters down, but am asking if anyone has any sign of dirt getting past the filter and sticking to the oily spots. I want to buy one of these, but want to be sure.
            This is a major reason I would not put one on my F350 turbo diesel. The air filter on those are huge and I don't want to risk my warranty. But, I don't believe the risk is as high on other cars (no turbo). My understanding is the dust can build up on the turbo and cause serious problems.

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            • #7
              Re: K&N Filter performance?

              I have always used K&N's, but I hesitate for the GX. Oil on the filter? Well doesn't oil kill the injectors? Do I have to worry about that? Does anyone have long term experience with the filter and the effect on the injectors?

              As far as milage... Drive slower and draft.

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              • #8
                Re: K&N Filter performance?

                Intake air should not go through the fuel injectors. However, since you bring up the point, I wonder if could impact the Mass Air Flow sensor (if the GX has one).

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                • #9
                  Re: K&N Filter performance?

                  Originally posted by Larryect View Post
                  This is a major reason I would not put one on my F350 turbo diesel. The air filter on those are huge and I don't want to risk my warranty.
                  I don't think an air filter voids your warranty. Even if it does just keep the factory one and swap it out when you take it to ford.

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                  • #10
                    Re: K&N Filter performance?

                    A bit of thread drift here.

                    You wouldn't think so. But (according to the internet...) Ford has been using anything they can grasp to deny warranty work. My understanding is dust on the turbo would be one such reason - to deny repair of the turbo anyway.

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                    • #11
                      Re: K&N Filter performance?

                      I would highly recommend a K&N Filter.

                      I put a K&N Air Filter in my old pickup, and the filter really does allow my engine to breath better. I do notice a minor horse power gain.

                      Stu Man

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                      • #12
                        Re: K&N Filter performance?

                        I don't believe in using K&N. Some dyno tests that I have seen on TV are very flawed. The type where the factory air box, which lead to an area of freash air, is removed, and replaced with a K&N cone-shaped open filter. Then they dyno WITH THE HOOD OPEN. In the real world, the K&N would be sucking air from the hot enclosed underhood area, not driving with a hood open to cooler air.

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                        • #13
                          Re: K&N Filter performance?

                          I just happened to be wandering around in the Gassavers Forum a few months back (which I joined because it looked like I was going to get a Grand Marq at the heirloom discount: didn't but that's a story for the lounge...)

                          These guys seem pretty sure of both their methodology and their results. I have no opinion either way.

                          http://www.metrompg.com/posts/air-filter-part-1.htm

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                          • #14
                            Re: K&N Filter performance?

                            K&Ns kick ass
                            I also use them on my PWCs
                            BLUE 09 GX

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                            • #15
                              Re: K&N Filter performance?

                              Make sure a newly oiled K&N is dry before using it otherwise your Mass Air Flow sensor may have problems if any oil gets on it.

                              Two other choices besides K&N

                              AMSOIL Absolute Efficiency Ea Air Filters No oil needed

                              Green High Performance Filters Very Expensive$$$$

                              Injen and AFE are also good for cold air intake systems.

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