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exhaust mileage increase

Discussion in '2nd Gen. Tacomas (2005-2015)' started by PNWIW, May 11, 2008.

  1. May 11, 2008 at 9:19 AM
    #1
    PNWIW

    PNWIW [OP] Member

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    Has anyone that has installed an aftermarket exhaust system noticed an increase in fuel mileage?
     
  2. May 11, 2008 at 10:31 AM
    #2
    RememberMorrison

    RememberMorrison Yeah, I'm that Guy

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    Coupled to a CAI and the right tune you can see a better increase in MPG, but I wouldn't count on it. If there was any it would be 1-2 mpg, after about 1500 bucks worth of pipes.
     
  3. May 11, 2008 at 11:31 AM
    #3
    tdm156

    tdm156 Well-Known Member

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    Seems that with the engines of today that an exhaust mod is just for your own desires and not so much for extra fuel mpg's...
     
  4. May 11, 2008 at 11:45 AM
    #4
    RememberMorrison

    RememberMorrison Yeah, I'm that Guy

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    Exactly. However with my 07 Mustang GT I had full exhaust, headers, x-pipe no cats, cat backs, CAI, and a tune, and I got 30+ mpg on the highway.

    So for some applications it does work. I know with my Mustang I got much much better fuel economy, however it cost over 2 grand to get the extra mpgs.
     
  5. May 11, 2008 at 11:47 AM
    #5
    BLOCKADE

    BLOCKADE Well-Known Member

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    not to be argumentative, but its actually only about $600 in pipes and a couple of guys are reporting about 2-4mpg in increased fuel mileage. With gas prices on the rise, it might actually be worth it.

    I recently had a conversation about this with my brother, who is a BMW certified mechanic. He said that he would suggest a reprogram/change in the computer to get the best MPG out of any vehicle. So some kind of active computer management would net the best MPG increase.
     
  6. May 11, 2008 at 1:20 PM
    #6
    RememberMorrison

    RememberMorrison Yeah, I'm that Guy

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    What exactly are guys putting on? Y-pipes and catbacks? I bought my Taco 2 days ago....
     
  7. May 11, 2008 at 1:21 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    At 2-4 mpg, it would take about 12,000 miles to see any saveings after the price of the exhaust. :) Thats if you get about 22 mpg average, and pay $3.50 a gallon for gas.
     
  8. May 11, 2008 at 1:43 PM
    #8
    RememberMorrison

    RememberMorrison Yeah, I'm that Guy

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    +1
     
  9. May 11, 2008 at 3:11 PM
    #9
    BLOCKADE

    BLOCKADE Well-Known Member

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    Weather Tech Floor Liners, Front Bed D-Rings...
    your assuming that gas is going to stay below the 3.50 a gallon mark, which it is already above here. the "experts" say it could go as high as $6.00 a gallon before this time next year.
     
  10. May 11, 2008 at 3:24 PM
    #10
    Ridgerunner

    Ridgerunner Well-Known Member

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    2001 with; cat-back twin exhaust,elbow mod, Westin bullbar with Hella550's, Snugtop XTR camper shell, TRD off-road 2x4-black beauty.
    I gained 22 HP with mine but lost a couple MPG's...if you guys see an increase on the 4.0 that's lucky.
     
  11. May 11, 2008 at 3:29 PM
    #11
    BLOCKADE

    BLOCKADE Well-Known Member

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    Weather Tech Floor Liners, Front Bed D-Rings...
    did that 22hp gain cause you to change your driving habits? cuz I would guess it would be easier to punch it if you could feel it or even know that it's there.
     
  12. May 11, 2008 at 3:39 PM
    #12
    Ridgerunner

    Ridgerunner Well-Known Member

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    I see what you're saying-yeah it makes enough difference to satisfy-but my habits haven't changed. I've always treated her to WOT onto freeways or maybe the occasional long open stretch...but now that things are flowing a little better, it's drinking up a little more to do tha same stuff. I've got the older 3.4 and it has a nice big airbox and intake plenum stock-so there ya go:)
     
  13. May 11, 2008 at 3:43 PM
    #13
    Evil Monkey

    Evil Monkey There's an evil monkey in my truck

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  14. May 11, 2008 at 3:56 PM
    #14
    RememberMorrison

    RememberMorrison Yeah, I'm that Guy

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    BTW a good way to increase mpgs is to get skinnier tires.
     
  15. May 11, 2008 at 4:04 PM
    #15
    Ridgerunner

    Ridgerunner Well-Known Member

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    Good site Rob-thanks!
     
  16. May 11, 2008 at 4:56 PM
    #16
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I was simply useing the "$3.50 gallon" to get my estimated miles until saveings. :)
     
  17. May 11, 2008 at 4:57 PM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    What exhaust are you running? The biggest gain I ever saw on a dynoed 3.4 was just over 5 h.p. A flowmaster exhaust system on a 3.4 that we tested actually LOST 4 h.p. :confused:
     
  18. May 11, 2008 at 5:10 PM
    #18
    Ridgerunner

    Ridgerunner Well-Known Member

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    I'm running a stock '06 1 inlet/2 outlet Tundra muffler (Waltrip Edition) with two 3" pipes out the passenger side. My truck is rated at 190HP. After the install of the exhaust (I didn't add anything else) it was dyno'd at 212HP. I was told by the TRD guys you have to really watch how much you open your exhaust on these because Toyota tries to balance everything just so. I just wanted twin pipes mainly for the appeal and I got a little bonus :D:D
     
  19. May 11, 2008 at 5:29 PM
    #19
    RememberMorrison

    RememberMorrison Yeah, I'm that Guy

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    Thats to the crank I assume?
     
  20. May 11, 2008 at 5:30 PM
    #20
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    So....did they yank the engine out to do the dyno? I know the 3.4 is Rated at the crank to be 190 h.p. ( actually closer to 150 at the wheels), Im just courious about how the dyno was run, and how they got the messured numbers. I have played with countless exhaust setups with Toyota motors and have never seen that big of a gain. As for the "balance", they probably meant "timeing" or "scavenging". Dont take my couriosity as disbelief, just scratching my head is all.
     
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