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DIY: Secondary Air Filter Removal

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

  1. Jul 3, 2016 at 12:11 PM
    #821
    njcoma

    njcoma Well-Known Member

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    My charcoal filter was terrible.. I bought my truck certified pre owned... so the previous owner have ran a crappy filter that let stuff past it.. and I guarantee the dealership doesn't check the charcoal filter as one of its inspections..

    Once that charcoal filter is dirty.. there's no cleaning it.. I run a K&N drop in now... it's cheaper for me to wash and oil it after a mtn or desert trip than to buy a new one...
     
  2. Jul 3, 2016 at 12:43 PM
    #822
    worthywads

    worthywads Well-Known Member

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    K&N drop in is crappy filtration.
     
  3. Aug 9, 2016 at 8:40 PM
    #823
    MSU Taco

    MSU Taco More cowbell

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    So I haven't done this to my 4.0 and likely won't. However let's think about this logically, and I bring this up only because in my first 20 pages of skimming I didn't see this get brought up. To those saying the screen presents absolutely no restriction, I say you're incorrect. Imagine a completely open pipe with a single strand of thread stretched inside it at 2 sides. Albeit extremely minimal as in .000001 minimal there is still an impedance. Multiply that by however many strands make up this screen and that creates more impedance. Sure it's still minimal enough that that it produces any real significance but it is still restrictive. If tiny fibers don't make a difference then why do Olympic swimmers shave their arms and legs and wear caps. To shave .001 off their time is why.
    As far as dyno results are concerned, sure I have no doubt that a 10 second pass at WOT didn't yield a difference. Has anyone ran it in a dyno for a solid 3.5 hours or however long it takes to burn a whole tank? I doubt it because that would be ridiculous. To truly find the answer for this would take a weeks and weeks of extremely well documented drives in ideal driving conditions to prove or disprove.
    Could this mod be snake oil for the 4.0? In a nutshell is so that's mostly true because the real world gain may only be measure able over multiple tanks and pretty much is perceived as "no gain". Just my 2 cents.
     
  4. Aug 9, 2016 at 9:33 PM
    #824
    worthywads

    worthywads Well-Known Member

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    Except there are industry standard tests that are actually designed to compare more accurately than multiple tanks and the wmany uncontrollable variables. These test prove without a doubt that a restricted intake doesn't reduce mpg, if indeed you are talking mpg, you're not specific about what is a gain, other than multiple tanks implies you are talking mpg. 3.5 hour dyno test?

    If the filter can flow more than the engine can it doesn't matter if there is restriction.

    The logical assumption that a restriction means a reduction in mpg has been proven wrong.

    http://www.fueleconomy.gov/feg/pdfs/Air_Filter_Effects_02_26_2009.pdf
     
  5. Aug 15, 2016 at 8:48 PM
    #825
    MSU Taco

    MSU Taco More cowbell

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    Just a shot in the dark but as opposed to tearing out filters that seemingly net 0 results has anyone tried some type of thermal insulator on the OEM intake tube similar to what's used on intercooler pipes to try and lower the intake air temperature by reducing the affect of the ambient heat coming from the engine on the plastic piping and assumingly keeping the intake air as dense as possible? Honestly it'll probably look like crap but if it reduces intake temp then maybe it'll make a very small difference.:notsure:
     
  6. Nov 13, 2016 at 6:28 PM
    #826
    RivMcLean

    RivMcLean Member

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    Internal LED Lighting, tinted windows, AC drain reroute
    California's smog check on new cars is now pretty simple, they only connect it to a computer to make sure the computer is functioning and doing what it is supposed to do for emissions, the inspection they use to do wasn't done on my 04 BMW, when I asked, they told me the above. At least this was my recent experience, but who really knows, after all like it was said, it is California...
     
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