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New exhaust. Better mpg?

Discussion in '3rd Gen. Tacomas (2016+)' started by Kamille.bidan, Mar 9, 2019.

  1. Mar 9, 2019 at 6:50 AM
    #1
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    i got a new exhaust installed, and I was shocked to see an increase in MPG. I didn’t think was actually possible.

    My current tank mpg is 21.1 (no picture), with half city and half highway. I have a MT m with combined epa of 17mpg.

    The exhaust has way too much highway drone, so I am going to have to get rid of this muffler.

    I feel like there has been a change in power as well. I didn’t have to downshift when going up a mountain. Of course it’s butt dyno, so take that for what it is. I wasn’t expecting any increase in MPG or power.

    B5993F3C-A79E-4882-AEE8-6B0C2533645B.jpg
    C74DF6F3-C4A1-4BFD-B116-BC8EB9E46DB0.jpg
    7670FB2B-571E-405F-A5CF-EFA4D5D8415C.jpg
     
  2. Mar 9, 2019 at 7:00 AM
    #2
    HacksawMark

    HacksawMark Well-Known Member

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    Not to put a damper on your enthusiasm, but I find it hard to believe that simply changing your exhaust would give you a nearly 43% improvement in mpg. Depending on where you live, it could simply be weather related. Only time will tell when you track it.
     
  3. Mar 9, 2019 at 7:29 AM
    #3
    hiPSI

    hiPSI Laminar Flow

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    That's because it's not true. It's like feeling better after a haircut or. It's all in your mind.
    You also know using that instant mpg or even a tank full is bs. Gotta have many data points.
     
    shakerhood, xxTacocaTxx and stun gun like this.
  4. Mar 9, 2019 at 9:38 AM
    #4
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    The Placebo effect is real. But... I have had three tanks already and each had higher MPG than normal.


    made the thread to see if this is real or BS.

    Ovtune described the engine as having an overly restrictive exhaust system, which affects the engine’s performance according the Matt. I think he is the current expert on this engine outside of Toyota. Otherwise, if it wasn’t for Ovtune , I wouldn’t believe it was possible for a new exhaust system to make any difference.
     
  5. Mar 9, 2019 at 9:43 AM
    #5
    M1Awolf

    M1Awolf Well-Known Member

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    Install this in front of your muffler and it will cut down the drone considerably. Note that it is a spiral louvered design and you want it installed so that the exhaust flows "into" the louvers not "over" this will also give you back some of the back pressure you lost with the Flowmaster knock off muffler you installed. Most local exhaust shops should have something like it in stock ;)

    https://www.amazon.com/straight-Uni...glasspack&qid=1552153057&s=automotive&sr=1-27

    Here is one installed on mine with the URD Y pipe cat delete system and Flowmaster dual outlet cat back.IMG_20181230_110240137.jpg
     
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  6. Mar 9, 2019 at 9:46 AM
    #6
    M1Awolf

    M1Awolf Well-Known Member

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    See my post,the URD cat delete Y pipe really freed up some top end power but I lost bottom end and gained drone. See my solution that seems to have balanced those out.

    ETA also OVTuned ;)
     
  7. Mar 9, 2019 at 9:46 AM
    #7
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    It’s a black widow knockoff, which the shop makes themselves. they are a black widow vendor, but black widow never has any parts in stock.

    They have flowmaster knockoffs but I didn’t want that.
     
    09 Redneck likes this.
  8. Mar 9, 2019 at 9:55 AM
    #8
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    I’ll try the resonator. Thanks for the tip
     
  9. Mar 9, 2019 at 9:58 AM
    #9
    M1Awolf

    M1Awolf Well-Known Member

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    Probably a comparable design to a flowmaster that actually creates a negative back pressure,good for higher rpm power but you loose on the low end. You need "some" back pressure if you want to retain low end torque ;)
     
    Shades_Of_Red likes this.
  10. Mar 9, 2019 at 10:29 AM
    #10
    HacksawMark

    HacksawMark Well-Known Member

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    Do track you mpgs over time (see my sig)?
     
  11. Mar 9, 2019 at 10:35 AM
    #11
    xxtavixx

    xxtavixx Well-Known Member

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    Oof they think a lot of that. I did the short shift kit, and I think theyre running a serious mark up.
     
  12. Mar 10, 2019 at 1:28 PM
    #12
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    more evidence of a mpg increase. It’s not worth the noise though.

    4FAE4A3C-271E-49B7-B3B4-398A10769A36.jpg
    59B73F25-F40B-4FE1-9C31-90DA6B9906FD.jpg
     
    stealthmode likes this.
  13. Mar 10, 2019 at 4:11 PM
    #13
    shakerhood

    shakerhood Well-Known Member

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    I see numbers like that from my truck too with a stock exhaust.
     
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  14. Mar 10, 2019 at 4:48 PM
    #14
    jmneill

    jmneill Well-Known Member

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    You didn't get one.
     
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  15. Mar 10, 2019 at 4:53 PM
    #15
    Thatnoobguy

    Thatnoobguy Well-Known Member

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    Got mbrp 3 in cat back. No change what so ever, was actually worried bout losing low end since its 3 in rather than stock 2.5. But it is after cats so....
     
  16. Mar 10, 2019 at 10:38 PM
    #16
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    Normal highway trip today, and I got 22MPG whereas usually I get around 19 because of the uphill portion. I went 65MPM to 70MPH the entire way.
     
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  17. Mar 10, 2019 at 10:39 PM
    #17
    Kamille.bidan

    Kamille.bidan [OP] Well-Known Member

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    I have never seen those type of numbers without going downhill.
     
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  18. Mar 10, 2019 at 10:45 PM
    #18
    Retumbo7

    Retumbo7 Well-Known Member

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    I don't see how you can say this with such certainty? I can't speak about the OP, but I PROMISE you that gaining MPG is not uncommon with a less restrictive exhaust for some vehicles (albeit mainly turbocharged).
     
  19. Mar 10, 2019 at 11:04 PM
    #19
    FlamingTacoBro

    FlamingTacoBro Taco Junkie

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    me too!:rofl:
     
  20. Mar 10, 2019 at 11:11 PM
    #20
    shakerhood

    shakerhood Well-Known Member

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    When we get back to summer fuel it's not unusual for me to see 21 or 22 per tankfull of just general driving, but I can see 25 or 26 on the per trip like you posted too.
     

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