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Drilled hole in air filter box...

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Ezriderga, Aug 6, 2011.

  1. Aug 6, 2011 at 6:23 AM
    #1
    Ezriderga

    Ezriderga [OP] Well-Known Member

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    I saw where someone posted they cut the entire front of the airbox out. I took a more conservative approach.

    I Drilled a 1 5/8 hole in the front of the airbox right in the center of the depression. Did not remove the secondary filter.

    After doing so, I noticed the RPM at idle cold was about 200 higher. Also noticed the lag in acceleration that I was experiencing is gone.

    I have filled up my fuel tank and am going to check mileage. It really is a moot point whether it's better or worse. I'm just curious. I am most pleased that the lag is gone.
    IMG_0708.jpg
     
  2. Aug 6, 2011 at 8:16 AM
    #2
    vbibi

    vbibi Well-Known Member

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    Around here they call it a deck plate mod.
     
  3. Aug 6, 2011 at 8:19 AM
    #3
    Andrew H

    Andrew H What is this "search" you speak of?

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    The deckplate mod has an actual deckplate in it. And its only beneficial to 1st gens.
     
  4. Aug 6, 2011 at 8:55 AM
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    lembowski

    lembowski Well-Known Member

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    Interesting
     
  5. Aug 6, 2011 at 8:56 AM
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    prerunner32

    prerunner32 TRD

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    Agreed... Sub'd
     
  6. Aug 6, 2011 at 9:01 AM
    #6
    mcdowell

    mcdowell My name is Mudd

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    Is this an easier way than say like a K&N ?? Just curious. What makes this more beneficial to 1st generations? 2nd gen. engineering solve this issue?
     
  7. Aug 6, 2011 at 9:08 AM
    #7
    Matic

    Matic Locked and Lifted "02" DC TRD.

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    You should disconnect your neg battery terminal to help the ecu speed up the process of learning a new af ratio.
     
  8. Aug 6, 2011 at 9:11 AM
    #8
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The only thing I can see this doing, is letting more warm air into the engine, giving a more lean condition (Warmer air has less O2, so the AFR is leaned out).
     
  9. Aug 6, 2011 at 9:26 AM
    #9
    beaver_scott

    beaver_scott Well-Known Member

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    so when more air is introduced to the intake does the cpu compensate by delivering more fuel to keep the programmed ratio of fuel and air?
     
  10. Aug 6, 2011 at 9:29 AM
    #10
    cummins6speed

    cummins6speed Well-Known Member

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    Don't you mean less lean and more rich?
     
  11. Aug 6, 2011 at 9:32 AM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    The 1 5/8" hole isnt going to allow any more flow than the air box is already delivering. You can check this with a scan tool of your choice, and watch the MAF Gms./sec. air flow reading.

    No. Warmer air = less O2. Less O2 = less fuel injected into the engine.
     
  12. Aug 6, 2011 at 9:36 AM
    #12
    cummins6speed

    cummins6speed Well-Known Member

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    But if you have less O2 and less fuel then you will still have the same AFR (provided the reduction in O2 and fuel are proportional
     
  13. Aug 6, 2011 at 9:37 AM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Correct. The computer will adjust to keep the AFR's in check.
     
  14. Aug 6, 2011 at 9:39 AM
    #14
    aficianado

    aficianado Well-Known Member

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    back to bone stock.
    in my engineering classes..i learned that most car motors have a choke point in the air supply system and it is rarely the air cleaner.

    on my old 911, i can take off the air filter and see zero benefit because the stupid air sensor plate is the restriction point.

    any added risk to suck water thru that opening?
     
  15. Aug 6, 2011 at 9:41 AM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Correct. On a modern vehicle, that choke point is the Throttle body, although its sized according to the CC volume, and what the valves can flow.
     
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