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Spoiler alert! Lol

Discussion in 'Performance' started by 4Runner fun, Apr 17, 2019.

  1. Apr 17, 2019 at 3:12 PM
    #1
    4Runner fun

    4Runner fun [OP] Just the beginning...

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    Wrangler Duratracs, center console organizer & trav all 1576 dog divider for the rear. Xpel wrap with ceramic coating. 20% tint on front windows. TRD intake. TRD oil cap Plus parts on shelf & a wish list.
    Anyway, I was looking at the TRD intake & noticed that in the upper housing portion. There appears to be a permanent "pre" filter?
    I have been around a lot of CAI's for car & trucks but never seen anything like this.
    It appears that it would collect dust first & then it would get to the filter. So, if this is permanent it would need to be cleaned.?
    What am I missing here!
    Thanks in advance,
    Ryan.20190417_165808.jpg 20190417_165814.jpg
     
  2. Apr 17, 2019 at 3:16 PM
    #2
    HoBoDanny

    HoBoDanny Dude...

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    RCI Skid Plate CBI Ditch Light Brackets Hankook DynaPro ATM RF10 265 70R17 113T Tires 1.25” Wheel Spacers TPMS Bypass Mod Hydrocarbon Filter Removed Merca decal 2” leveling kit front only Black headlights
    Looks like the carbon filter most remove from 4th gens. They aren’t cleanable so will restrict air flow to the engine
     
    MattAK and 4Runner fun [OP] like this.
  3. Apr 17, 2019 at 3:57 PM
    #3
    4Runner fun

    4Runner fun [OP] Just the beginning...

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    Well, apparently I should read the directions, yet I still don't understand its purpose!
    I had the direction of air flow confused.
    This is a post air filter (filter).
    Even with diligent filter cleaning I see this becoming full of dirt etc.
    Not sure how to start a pole now.

    Who says keep?

    Who says cut out?

    I am leaning towards leaving it in for 1k miles to see the drawbacks and/or benefits.
    Thanks all!
    20190417_175123.jpg
     
  4. Apr 17, 2019 at 4:06 PM
    #4
    4X4Runner

    4X4Runner Moderator Staff Member

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    The left coast
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    Mad driver mod. OME Suspension. 285/70R17 BFG AT KO2
    Reminds me, I still need to remove mine off my OE intake
     
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  5. Apr 17, 2019 at 5:15 PM
    #5
    SR5 Limited

    SR5 Limited New Member

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    I think it helps to “dry” the incoming air...I would keep it...
     
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  6. Apr 17, 2019 at 5:39 PM
    #6
    4X4Runner

    4X4Runner Moderator Staff Member

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    The left coast
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    If I were putting in a K&N or TRD air filter I’d keep it in place.
     
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  7. Apr 17, 2019 at 6:10 PM
    #7
    HoBoDanny

    HoBoDanny Dude...

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    Cut it!
     
  8. Apr 17, 2019 at 6:10 PM
    #8
    4Runner fun

    4Runner fun [OP] Just the beginning...

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    Wrangler Duratracs, center console organizer & trav all 1576 dog divider for the rear. Xpel wrap with ceramic coating. 20% tint on front windows. TRD intake. TRD oil cap Plus parts on shelf & a wish list.
    I (he, oops) is planning on running the cleanable & oiled TRD filter. Not sure if TRD makes a paper one. It (oiled one) came with the system.
    If it has a layer that doesn't let water through it is worth keeping. The 6.0 ('03-'07) Ford diesel fuel filter has a one way water stopper film. No aftermarket filter has one to date...
     
  9. Apr 17, 2019 at 6:13 PM
    #9
    4Runner fun

    4Runner fun [OP] Just the beginning...

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    @4X4Runner
    When would you take it out & what filter would you use?
    No snorkel. My wife would kill me! LMAO
     
    Last edited: Apr 17, 2019
  10. Apr 17, 2019 at 7:07 PM
    #10
    4X4Runner

    4X4Runner Moderator Staff Member

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    The left coast
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    I’d take it out and run OEM filters. Reason I say I’d keep it in place is take any K&N or TRD filter (ones you clean and oil) and put them up against a bright light or the sun. You’ll see little pin holes of light poking through. If light can get through so can little particles of dirt. If you remove the after element that dirt has a free path into your cylinders
     
  11. Apr 17, 2019 at 7:54 PM
    #11
    4Runner fun

    4Runner fun [OP] Just the beginning...

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    While I do agree & see your point.
    I thought that was the point of the oil. To attract, trap & hold the dirt till the cleaner/ release agent was put on.
    That has been the debate over the years. Dry vs wet filters.
    Maybe more research is needed into this filter and it's reason.
    I may contact my dealership. I know them all now!
    I still am not 100% on its purpose.
     
  12. Apr 17, 2019 at 8:01 PM
    #12
    4X4Runner

    4X4Runner Moderator Staff Member

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    The left coast
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    The way I look at it is, even if oiled under load and vacuum the oil isn’t going to hold together enough to close those gaps. Sure OE is more restrictive but I think it buys a little more assurance
     
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  13. Apr 17, 2019 at 8:58 PM
    #13
    Thatbassguy

    Thatbassguy New Member

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    I agree with this! I put a drop in k&n in my Tacoma 2 years ago. After a few trips up north, my oil came out very dark on the next oil change. I assumed it was from dirt getting through the filter.

    I went back to OEM filter and never saw the oil get that dark again.

    Just my experience. YMMV
     
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  14. Apr 18, 2019 at 7:38 AM
    #14
    MattAK

    MattAK t4r.org refugee

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    Yes, that looks exactly like the hydrocarbon filter I broke out of my 4th gen intake. I just run an aFe Pro Dry filter now.

    Edit: lol, I thought I was quoting 4x4Runner and not you HoBoDanny, since you also have a 4th gen.
     
    Last edited: Apr 18, 2019
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  15. Dec 5, 2019 at 8:35 PM
    #15
    Blue 4ever Runner

    Blue 4ever Runner New Member

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    Blacked out badges, window deflectors, smoked 3rd brake light. I have a Borla muffler on order as well as some color matched engine cover stickers. I'll be painting the stock wheels soon as well. Falken tires in the fall as well.
    I have a 2019 SR5 and it also has this after filter. I installed a dry AFE filter and removed the charcoal filter. I don't know if makes much of a difference as far as flow but it can't be helping at all. From what I understand it supposedly absorbs any gas fumes that aren't burned in order to reduce emissions. Who knows but I say remove it.
     
  16. Dec 5, 2019 at 8:41 PM
    #16
    SR5 Limited

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    Mine never had any of this newfangled technology. I think I’ve changed my air filter three times in twenty years.....
     
  17. Dec 5, 2019 at 9:24 PM
    #17
    4runningMan

    4runningMan New Member

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    I think you’re probably correct.
     
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  18. Dec 5, 2019 at 9:32 PM
    #18
    4runningMan

    4runningMan New Member

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    It must be a percentage thing. If you can see light through the pin holes, any microscopic particles that pass through it aren’t gonna be grabbed by the oiled filter medium.

    This is pure speculation... but I imagine it like this. Air passes through oiled AND paper filters. Less air passes through a paper filter. That’s why we arguably see a performance gain with an oiled filter.

    So, while both filters are filtering to tolerance specs, the paper is probably filtering a little better. Does that matter? The answer to that question is gonna be different for different people.

    Wanna run your truck to a million miles? Maybe paper is better for you. Want some more power and don’t care if you even hit 300k miles, by all means, go with an oiled filter.

    Neither of them is gonna wreck your engine in 150k miles.

    (All these numbers I’ve thrown out... they’re just for making a point)
     
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  19. Dec 6, 2019 at 6:18 AM
    #19
    nimby

    nimby in the drink

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    It trips me out when people change their oil every 5,000 miles as "cheap insurance" while simultaneously using a high flow air filter with larger tolerances for foreign particles to travel through.
     
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  20. Dec 6, 2019 at 9:35 AM
    #20
    glwood54

    glwood54 New Member

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    While overinflating the tires to save $3/year in gas, but prematurely wearing out an $800 set of tires...?
     
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  21. Dec 6, 2019 at 2:04 PM
    #21
    4x Old Guy

    4x Old Guy New Member

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    Dry filters work by letting air get through and dirt particles getting prevented from going through the gaps between the filter fibers. When one hole gets clogged with a piece of dirt, that hole is no longer available for air to go through afterwards. At some point, enough holes get clogged with dirt, the airflow becomes restricted enough to affect engine performance. Now, if a piece of dirt is too small to get stuck in a hole, it just goes right through, caroming off other fibers and eventually exiting the filter and getting sucked into the engine.

    Oiled filters work a little differently. The holes are a little bigger so it takes more dirt to clog them up, thereby reducing engine performance. But, the fibers are coated in oil (if there is enough oil to clog the holes, as evidenced by oil showing up in the housing after the filter, then way too much oil has been applied, and the airflow will suffer). Really big pieces of dirt will get stuck in the holes as with a dry paper filter. However, smaller particles will get through the holes. As they carom around, they bump into oil coated filter fibers and get stuck to the oil like flies on flypaper. There is still plenty of room for air to get around the stuck dirt and a billion more oiled fibers to catch more dirt. This results in the airflow remaining relatively unobstructed, and being able to go longer between cleanings.
     

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