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Deckplate = Worse MPG?

Discussion in '1st Gen. Tacomas (1995-2004)' started by gatrapper, Oct 1, 2011.

  1. Oct 1, 2011 at 8:01 AM
    #1
    gatrapper

    gatrapper [OP] Well-Known Member

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    I have read on a few other places that the deckplate mod will lower your MPG. They said that the truck intakes hotter air, which lowers the MPG.

    Thoughts on what was said above?

    Also any other input of the positives and negatives of the deckplate will be appreciated.
     
  2. Oct 1, 2011 at 8:08 AM
    #2
    Blackdawg

    Blackdawg Dr. Frankenstein

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    Not for me. After my new exhaust and deckplate i gained about 1.5mpg
     
  3. Oct 1, 2011 at 8:21 AM
    #3
    97yota4wd

    97yota4wd Well-Known Member

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    alot of metal, small engine, decent travel.
    caged, camburg long travel, 50t leafpack (soon to be installed) light rack over cab, 5pt harnesses etc
    i have heard eveyone gains from it cause the air from outside gets forced into it
     
  4. Oct 1, 2011 at 8:25 AM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I saw a gian on my first gen. That being said, Hotter air = better mpg. Hotter air has less O2 density, thus requiring less fuel to achieve an 14.7-1 AF ratio.....
     
  5. Oct 1, 2011 at 8:31 AM
    #5
    Blackdawg

    Blackdawg Dr. Frankenstein

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    :ohsnap:
     
  6. Oct 1, 2011 at 9:39 AM
    #6
    scalfee90

    scalfee90 Well-Known Member

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    It actually causes mine to have cold start issues and my mpg tends to suck when its out. Mines a V6.
     
  7. Oct 1, 2011 at 12:19 PM
    #7
    ffirg

    ffirg Well-Known Member

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    I noticed a decrease in mileage by about 1.5. :notsure: But I did have a pretty nasty air filter. I changed that and I'm testing it with and without the deckplate now....
     
  8. Oct 2, 2011 at 12:29 AM
    #8
    Digiratus

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    That kinka flies in tha face of the supposed advantages of cold air intakes doesn't it?
    I've not been able to see a difference between having the plate off or on. I monitor my fuel mileage pretty closely with my scangauge.
     
  9. Oct 2, 2011 at 12:32 AM
    #9
    onesixseven

    onesixseven Well-Known Member

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    havent tested a full tank yet so ican get a true reading, but i did however notice a power difference, so if i lose maybe 1 mpg, IMO, its worth it. but i doubt i will
     
  10. Oct 2, 2011 at 5:48 AM
    #10
    ilove_taco_ma

    ilove_taco_ma Well-Known Member

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    nothing, all stock expect got a OE replacement air filter K&N.
    OP, if you already did the deckplate mod and don't like the mod affecting you mpg leave the cover on. otherwise, if you like the little power gain then it is worth that mpg drop.
     
  11. Oct 2, 2011 at 8:10 AM
    #11
    asmoran

    asmoran Member

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    No, not really. Higher density means more fuel and more power. People install a CAI for power, not for fuel economy.
     
  12. Oct 2, 2011 at 1:25 PM
    #12
    TacoMX

    TacoMX TW's Official anti body-lift pundit

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    IMO, messing with the intake on your truck will degrease MPG's. Its designed from the factory to be efficient. Save maybe the elbow mod.

    I put on a CAI, and lost about 2mpg w/ little to no improvement in power. I put the stock intake back on..
     
  13. Oct 2, 2011 at 1:33 PM
    #13
    worthywads

    worthywads Well-Known Member

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    It flies in the face of the incorrect assumption that a cold air intake makes better mpg. People that are looking for max mpg create warm air intakes off of the exhaust.
     
  14. Oct 2, 2011 at 8:56 PM
    #14
    Digiratus

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    Some CAI manufacturers (and their retailers) do make a clam of higher MPGs.

    With the installation of an aFe Cold Air Intake Magnum Force Stage 1, you are basically removing the most restrictive part of the stock air intake system. You will feel an immediate improvement in acceleration and throttle response. Every vehicle responds differently but you are guaranteed to improve the fuel economy and enhance performance.

    http://4wheelonline.com/AFE_Cold_Air_Intakes.58741
     
  15. Oct 2, 2011 at 9:01 PM
    #15
    davidpick

    davidpick NWXPDTN

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    i've been running the deckplate mod and an AFE pro-dry air filter for about a year now and still get 19-20mpg on the freeway. same as what i got before the mods. no difference in mpg for me, but i do like the sound :)
     
  16. Oct 2, 2011 at 9:35 PM
    #16
    worthywads

    worthywads Well-Known Member

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    The most restrictive part of the stock air intake system is the throttle plate at anything less than wide open throttle. At part throttle a restricted air intake has zero effect, it's still less restricting than the throttle plate that is intentionally holding the engine back from uncontrolled acceleration.
     
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