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Charcoal filter delete

Discussion in '3rd Gen Tundras (2014-2021)' started by EverydayTundra, Mar 23, 2019.

  1. Mar 23, 2019 at 5:45 AM
    #1
    EverydayTundra

    EverydayTundra [OP] New Member

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    I was very sceptical about the fuel mileage increase claims made by folks who completed the charcoal filter delete on their tundras initially, but after looking at the process and seeing how easy it was to do, I figured I'd try it. And I'm glad I did. My mileage increased 1.9 mpg and it's been almost 2 weeks now. That's an extra 78 goals per tank. Very happy!
     
    HulkSmurf14 and Rica25 like this.
  2. Mar 23, 2019 at 6:03 AM
    #2
    Finch

    Finch New Member

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    Cool. You have a specific thread you found out about this? What is its purpose to be there in the first place?
     
  3. Mar 23, 2019 at 6:05 AM
    #3
    Jim LE 1301

    Jim LE 1301 Camaro Lover, SSEM # 11,TTC#179

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  4. Mar 23, 2019 at 6:08 AM
    #4
    BTBAKER

    BTBAKER BE YOU. THE WORLD WILL ADJUST.

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    I’ve read up on this quite a bit and it seems the consensus for at least half the people that have done it is that it does squat. Nothing..Mine is going to stay. They engineered it in for a reason.
     
    Barrett50, B737, netranger6 and 3 others like this.
  5. Mar 23, 2019 at 6:11 AM
    #5
    Finch

    Finch New Member

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    I wonder if this is the same kind of filter on my Tacoma. When I was getting my tundra tinted, the tint shop owner and I were talking about tacomas since I have one as well and he does too. He replaced this that I'm pointing to in the picture and had a very noticeable difference in gas mileage in his tacoma. He just replaced it with a fuel filter though which I'm sure is less restrictive than what was in there. I haven't replaced this in my Tacoma yet but I average 16.5 mpg (calculated).

    20190218_162010.jpg

    20190218_102835.jpg
     
  6. Mar 23, 2019 at 6:16 AM
    #6
    EverydayTundra

    EverydayTundra [OP] New Member

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    The filter is there for when you shut your engine down. It filters any possible fumes from back flowing into the atmosphere. It wasn't intentionally engineered into the vehicles during the initial process, it was an EPA mandate.
     
  7. Mar 23, 2019 at 6:25 AM
    #7
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

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    And in Today's Stupid Guvmunt Shit we have this ^^^
     
  8. Mar 23, 2019 at 6:33 AM
    #8
    Rex Kramer

    Rex Kramer Vinyl Spinner

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    You will occasionally smell those fumes once the filter is removed.
     
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  9. Mar 23, 2019 at 6:33 AM
    #9
    Danman34

    Danman34 New Member

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    You might notice a difference if you have some mileage on your truck and the filter is restricting flow.

    I pulled mine off my 18’ with only 1000 miles and noticed not a drop of difference good or bad.
     
  10. Mar 23, 2019 at 6:36 AM
    #10
    Jengel451

    Jengel451 Misanthropist

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    Yeah....that ain't gonna do much of anything. Have at it though.
     
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  11. Mar 23, 2019 at 6:57 AM
    #11
    Tacogrande

    Tacogrande New Member

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    Talking about the air filter correct? I wondered about that but when I asked about it here no one said much of anything. Its permanently glued in the air box and that alone makes me wonder about it but I figured if nobody's talking about just leave it be.
     
  12. Nov 14, 2019 at 5:30 PM
    #12
    TransNone13

    TransNone13 New Member

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    Gents, I did mine on a TRD CAI. Here are some definitive numbers and dynamometer tests from EE on YouTube. While it's not a Tundra, the results demonstrate the principle. There are improvements, yet minimal. Honestly, I was more concerned about it failing without the mesh gasket and that filter entering my intake manifold.


     
    Last edited: Nov 14, 2019
  13. Nov 14, 2019 at 5:44 PM
    #13
    netranger6

    netranger6 New Member

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    None. Keeping this one stock.
    Did on previous teuck. Did squat. Neither did a CAi Prefer stock.
     
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  14. Nov 14, 2019 at 5:45 PM
    #14
    TransNone13

    TransNone13 New Member

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    Accurate statements based on the results. Just wanted to provide some data because I was trying to research this for awhile. I have a spare lid to revert if I choose. I'm strange and did the CAI mostly for the looks.
     
  15. Nov 14, 2019 at 6:26 PM
    #15
    Spoolnms

    Spoolnms New Member

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    2MPG from a charcoal filter delete? I doubt that. Improvement yes, not no 2mpg though
     
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  16. Nov 14, 2019 at 7:57 PM
    #16
    TransNone13

    TransNone13 New Member

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    Too bad Toyota didn't go with this solution, like I said I went down a rabbit hole.

    Screenshot_20191114-195612_Firefox.jpg
     
  17. Jul 19, 2021 at 10:11 PM
    #17
    Keithbickford

    Keithbickford New Member

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    When the engine is shut off, there is a small amount of fuel vapor in the intake system. This prevents it from escaping into the atmosphere. As for economy, it’s simply not possible to make a difference. The throttle body position controls the amount of air entering into the engine. The incoming air amount is measured and the exact right amount of fuel is added. At full throttle with the filter removed, the engine would get a little more air and thus a little more fuel, and would make a little more power. At less than full throttle, it simply doesn’t matter.
    I never get the same fuel economy from tank to tank, but driving a bit slower makes a huge difference in my fuel economy.
     
  18. Jul 21, 2021 at 3:39 PM
    #18
    Rocko9999

    Rocko9999 New Member

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    [​IMG]
     
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  19. Jul 21, 2021 at 3:52 PM
    #19
    Keithbickford

    Keithbickford New Member

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    I remember deleting the muffler from my 1991 Honda Civic when I was a young kid. Before that time, I never gave it full throttle. After I removed the muffler, I was always giving it full throttle. I definitely noticed the extra power achieved by giving it more throttle. Ha Ha.
    The point is, at anything less than wide open throttle, it just doesn’t matter. If you remove your main air filter and the charcoal filter, and your catalytic converters and mufflers, then when you used to need to give it 1/2 throttle for a given power, you may need to give it 3/8 throttle now. You’re controlling the restriction with your throttle. If you remove other restrictions, then you compensate by letting off the gas. And since we don’t tend to drive at full throttle, nothing we change matters. If you do tend to drive at wide open throttle for racing, hauling, or trying to accelerate faster than ideal, removing obstructions will generally increase power, and you’ll also use more fuel.
     
  20. Jul 21, 2021 at 3:59 PM
    #20
    batman900

    batman900 New Member

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    Engineering explained did back to back dynos with his Subaru Crosstrek before / after removing the charcoal filter and same with a k&n filter. His results were that you could get about 3% increased HP by EITHER removing the charcoal filter OR adding the k&n filter. Doing both gave some super minor .3% gain or something like that.

    I've removed the charcoal on a few of our Toyotas but for some reason botched it on my Tundra. Normally it cleanly pops away from the box but on the Tundra it tore leaving threads at every glue point. Then I made it worse by trying different methods to get that off and ended up forking over too much money for another box top lol.

    https://www.youtube.com/watch?v=F1JmOKKAgyQ
     
  21. Jul 21, 2021 at 4:03 PM
    #21
    Winning8

    Winning8 New Member

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    I got a K&N drop in filter, not because I want more HP, it’s just because I could wash it when ever I want.
     
  22. Jul 21, 2021 at 4:07 PM
    #22
    batman900

    batman900 New Member

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    I just wanted to hear the engine a bit more without going with an aftermarket intake.
     
  23. Jul 21, 2021 at 4:11 PM
    #23
    Keithbickford

    Keithbickford New Member

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    I agree. At full throttle. Nobody measures horsepower at less. :)
     
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  24. Jul 21, 2021 at 5:38 PM
    #24
    batman900

    batman900 New Member

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    I'm not sure you could measure horsepower reliably otherwise, unless you somehow limited the throttle position through tuning so that mashing it to the floor only gave X amount of % other than 100. Edit: And throttle position only controls the amount of power being requested from what’s available relative to the power curve after all variables have been accounted for by the computer. More power available = more given relative to the position of throttle and position in the curve. That’s a simplified way of saying it, I know there’s much more to it. I’m not a tuner but I had the first 9th gen Civic Si to be custom tuned and after 30+ maps and some playing around with the software plus dynos I learned a little from the experience. But yeah in the end you won’t “feel” anything outside of a 10% bump.
     
    Last edited: Jul 21, 2021 at 6:25 PM
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  25. Jul 21, 2021 at 6:35 PM
    #25
    Keithbickford

    Keithbickford New Member

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    Many trust their butt dyno which is directly connected to the ear dyno (loud) and is also influenced by their eye dyno (go fast stickers)
    :)
     
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  26. Jul 21, 2021 at 7:05 PM
    #26
    THinTX

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    I deleted mine…no change. Didn’t really expect one though.
     
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  27. Jul 21, 2021 at 7:54 PM
    #27
    2mchfun

    2mchfun Lead foot, left lane, loud stereo

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  28. Jul 21, 2021 at 9:11 PM
    #28
    JLS in WA

    JLS in WA New Member

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