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DIY: Secondary Air Filter Removal

Discussion in 'Performance and Tuning' started by 007Tacoma, Jul 7, 2007.

  1. Feb 25, 2013 at 11:27 AM
    #561
    worthywads

    worthywads Well-Known Member

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    I don't think you have one, but it doesn't work for 2nd generation either.
     
  2. Feb 25, 2013 at 8:09 PM
    #562
    Rich91710

    Rich91710 Well-Known Member

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    LOL!

    My '03 Tundra 4.7 had one.
    Didn't do anything for it either... dunno why I did my 2.7. All I need is some anal-retentive smog tech and it'll cost me $300.
     
  3. Mar 2, 2013 at 11:45 AM
    #563
    jimbowie

    jimbowie Member

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  4. Mar 2, 2013 at 7:21 PM
    #564
    Rich91710

    Rich91710 Well-Known Member

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  5. Mar 5, 2013 at 7:26 PM
    #565
    RELLIM

    RELLIM Well-Known Member

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    Scan Gauge II, AFE air filter, charcoal intake filter delete Fitch Fuel Catalyst, Alpine iDA-X303, AMS OIL (ENGINE) Bilstein 5100 RHA series
    About the MAF Screen... It corrects the flow of air into the MAf..? My GF has a 04 Subaru Forrester XT 2.5 It has a Denso MAF that has no screen and the engine has a turbo..
    The subie maf part number is 197-6040
    2010 Tacoma maf part number is 197-6030

    Any ideas or info on this?
    I'm wondering if it would work to take the screen off.
    Part numbers are not the same but the shape of the MAf is the same.
     
  6. Mar 13, 2013 at 7:18 PM
    #566
    piglett

    piglett Member

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    lots of pages on this subject....wow
    ok so it does work on the 2.7L, cool
    does little or nothing on a 4.0L, well ok
    any info on the 3.4L?
    mine is a TRD do i have the same airbox as the later TRD's?

    thanks for your input
     
  7. Mar 13, 2013 at 7:19 PM
    #567
    worthywads

    worthywads Well-Known Member

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    No it really doesn't work for the 2.7L.
     
  8. Mar 21, 2013 at 5:17 PM
    #568
    beastplumber

    beastplumber New Member

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    K&N Air filter, WET in the rad. Rain-X wiper blades
    DO you know if removing the secondary filter voids the manufactueres warranty???
     
  9. Mar 21, 2013 at 5:31 PM
    #569
    worthywads

    worthywads Well-Known Member

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    No it doesn't, but it is rather pointless, and in many states you could fail emissions.
     
  10. Mar 22, 2013 at 8:36 AM
    #570
    piglett

    piglett Member

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    ok my 01 tacoma doesn't have one
    also no sign that there was ever one there
     
  11. Mar 22, 2013 at 7:43 PM
    #571
    Rich91710

    Rich91710 Well-Known Member

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    My '03 Tundra had one.
    Wife's '04 Rav4 doesn't.
     
  12. Mar 24, 2013 at 4:13 AM
    #572
    joedelli

    joedelli Member

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    My truck does have one. I removed it for inspection and found it to be distorted, "charcoal" element had settled and the vacuum from the engine was trying to suck the screen/gauze into the engine. I will get a replacement filter. However, with the charcoal filter gone, a KN installed and tonneau, I get consistently 20 mpg all around and better throttle response. BTW the KN does work (the paper filer is too restrictive. The tonneau makes sense as well (before, its like dragging an anchor, and it worked on my Dakota). I probably can't ask more from this truck as is. Its a daily driver 52 R/T and my fun off roader.
     
  13. Mar 24, 2013 at 10:15 AM
    #573
    Rich91710

    Rich91710 Well-Known Member

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    You have absolutely no flowbench data to back that up.

    I'm getting 24mpg on the OEM filter.
     
  14. Mar 24, 2013 at 10:54 AM
    #574
    worthywads

    worthywads Well-Known Member

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    I continue to get great mpg with a OEM with 40K on it. I'll change it at 60K.
     
  15. Mar 24, 2013 at 10:59 AM
    #575
    Rich91710

    Rich91710 Well-Known Member

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    Bingo.

    The K&N does flow "better" than stock, but to say that the stock filter is "too restrictive" is submitting to K&N marketing hype.
    And even Amsoil admits that their washable filters (AFE) do not filter as well as OEM.
     
  16. Apr 10, 2013 at 8:55 PM
    #576
    EatMyTacomaDust

    EatMyTacomaDust Well-Known Member

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    Ok. Thanks to Rich & Worthywads I'm NOT doing this mod, slightly interested before - slightly, but now after hearing some logical info on the subject - I think not.

    Thanks guys - Rich, Love your Truck - very tasteful, classy, and economical.

    Question though: Can you point me to the info about AFE saying their filters aren't as good as OEM? Just curious cause I just bought an AFE based on all the damn hype on these forums. I've been running OEM air filter now for 30k miles.
     
  17. Apr 10, 2013 at 9:35 PM
    #577
    Rich91710

    Rich91710 Well-Known Member

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    Interesting... Amsoil (AFE) seems to have modified their marketing and is now claiming significantly better filtration than cellulose.

    But here's some real-world test results of several filters:
    http://www.bobistheoilguy.com/airfilter/airtest3.htm

    Also interesting, related to the "how much is 'good enough' question:
    http://www.bobistheoilguy.com/airfilter/airtest2.htm
    "Best" was the K&N at 0.231psi
    "Worst" was Napa paper at 0.249psi.

    Having a hard time finding the charts that used to be posted.
    I found one that showed the Amsoil to be equal to quality cellulose, but it appears to be referring to the 2-stage foam filter.

    Anyways, a couple of years ago, Amsoil's marketing materials included a very good chart comparing 5 or 6 filters, including K&N, AC Delco, foam, and a couple of other "paper" filters.
    The graphs showed the "paper" (cellulose) being the most restrictive, but the best filtration. The Amsoil (AFE) came in below paper on filtration, but significantly higher than K&N... but with marginally better flow than K&N.

    Could be that those charts were removed because Delco wasn't happy about it? I don't know.
     
  18. Apr 11, 2013 at 6:14 AM
    #578
    piglett

    piglett Member

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    there is a difference between how well something flows & how well it filters. removing the filter all together will give the best flow but no filtering. so which one are we after???
     
  19. Apr 11, 2013 at 9:22 PM
    #579
    RELLIM

    RELLIM Well-Known Member

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    Scan Gauge II, AFE air filter, charcoal intake filter delete Fitch Fuel Catalyst, Alpine iDA-X303, AMS OIL (ENGINE) Bilstein 5100 RHA series
    So.. What's better for fuel mileage? More or less flow? This whole filter thing gives me
    a headache. I want good fuel mileage but don't want to be confined to paved roads.
    I really don't like k and n, filters. They are a pain in the ass to clean and oil.
    I like foam filters, they have been used for years on the track, only problem is I can't find one that fits as a drop in filter. There is one made by Blue Monkey I believe.. Not positive..
    Im not sure I'll upgrade to a cold air intake, to many problems with not enough choices of piggy back tuners.
     
  20. Apr 11, 2013 at 11:10 PM
    #580
    Rich91710

    Rich91710 Well-Known Member

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    Given the minimal difference in flow....
     
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