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2.7l and dual exhaust? (Calm down I know its not a v8)

Discussion in '4 Cylinder' started by maximilian55, Jan 16, 2014.

  1. Jan 16, 2014 at 3:46 PM
    #1
    maximilian55

    maximilian55 [OP] Well-Known Member

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    Has anyone ran dual exhausts with the 2.7?
    I personally think dual exhausts look cool on trucks. I was wondering if theres a good way to run dual exhausts on our little 4 bangers. Since its only a 4 cylider and not a v8, i was thinking I would just run a single exit muffler with a y pipe out the back. The thing im stuck up on, is what size pipe to use out the back. Since it would essentially have twice the amount of air flow out the back, Im assuming I would lose backend pressure. would running smaller maybe 2in pipe help that?

    I dont know much about exhaust so any advice would be appreciated.
     
  2. Jan 16, 2014 at 3:47 PM
    #2
    maximilian55

    maximilian55 [OP] Well-Known Member

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    and ditching the spare tire is not a problem for me
     
  3. Jan 16, 2014 at 8:50 PM
    #3
    ramirezsergio63

    ramirezsergio63 Well-Known Member

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    u can put a flowmaster 40, single in dual out. i have one but no dual and it has a nice rumble and its loud, no rice sound. just an idea though
     
  4. Jan 16, 2014 at 8:56 PM
    #4
    ramirezsergio63

    ramirezsergio63 Well-Known Member

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  5. Jan 16, 2014 at 9:01 PM
    #5
    worthywads

    worthywads Well-Known Member

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    :facepalm:


    Save the spare and install a dummy exhaust tip on the left side.
     
  6. Jan 16, 2014 at 9:18 PM
    #6
    maximilian55

    maximilian55 [OP] Well-Known Member

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    Im removing the spare tire anyways to make a rear tire carrier. And Id rather not have a dummy exhaust tip, I would get so much crap from my friends

    I read that the dual exit mufflers dont work well with 4 cylinders because of too little back pressure. which is why nobody runs dual exhausts. the only way i can think to make it work would be to run smaller pipe after the muffler.
     
  7. Jan 16, 2014 at 9:33 PM
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    worthywads

    worthywads Well-Known Member

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    Your friends are gonna give you crap for a dual exhaust 4-banger anyway.
     
  8. Jan 16, 2014 at 9:35 PM
    #8
    maximilian55

    maximilian55 [OP] Well-Known Member

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    true, but much less than if i had a dummy exhaust tip.
     
  9. Jan 16, 2014 at 9:36 PM
    #9
    tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    Even a single exhaust on a 2.7 that's larger than the stock 2 3/8" OD pipe doesn't work as well. I ran a single out the rear bumper...


    IMG_7668_zps516e26be_b9c1763cf5b332ae5d0bc1b13a3c70e409b4cd8c.jpg
     
  10. Jan 16, 2014 at 9:40 PM
    #10
    maximilian55

    maximilian55 [OP] Well-Known Member

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    Right now i have my exhaust dumped right after the muffler, so i figure almost any size pipe i add after the muffler will create more back pressure than what i have now.

    and your setup is super cool. I almost thought about doing that after seeing your picture awhile ago.
     
  11. Jan 16, 2014 at 10:08 PM
    #11
    tooter

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    It's ok to cut the pipe after the stock muffler as it still creates enough backpressure. My last setup was cut just behind the rear axle, and it worked fine.

    I would have loved to do duals, but it wouldn't work. It took a really talented muffler guy with a mandrel bender to do it right so that nothing hit or rattled, as the clearances were really tight. I had him run slightly smaller 2 1/4" OD for the tail pipe to compensate for the straight through MagnaFlow muffler.


    IMG_7670_zpsaf0b92d6_14666e529eb5b6c60405ce480a88de25cac73c2d.jpg
     
    Last edited: Jan 16, 2014
  12. Jan 16, 2014 at 10:26 PM
    #12
    maximilian55

    maximilian55 [OP] Well-Known Member

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    Gotcha, well with my spare tire gone im guessing ill have a lot more room. Im confident that I can put duals on. Im just not sure if they will perform decent enough
     
  13. Jan 17, 2014 at 8:14 AM
    #13
    tooter

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    Yeah, that's a question mark. But think of it this way, you can be the first one to try and can let everyone else know how it goes. If I was going to go that route, I'd go with 1.5 inch pipe since there are two of them.


    A more open exhaust isn't all negative, as you are likely to gain something on the top end for what you give up at the bottom. I just couldn't afford to do that because my Taco is a fully loaded daily driver work truck, and I do a lot of first gear driving up and down steep winding roads. So I need all the low end I can get. With the long tube header, intake manifold spacer, and reasonably sized exhaust, my engine pulls like a tractor while being highly resistant to stalling at very low rpms.
     
  14. Jan 17, 2014 at 8:28 AM
    #14
    Winker

    Winker Well-Known Member

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    I do like your badges.
     
  15. Jan 17, 2014 at 11:42 AM
    #15
    tooter

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    Thanks. :)
    Got them off ebay. The "2.7" is generic and available for different size engines. This is a 1.5 on my wife's car.


    [​IMG]




    ...and the "5 speed" is from a 1980's Ford Mustang.


    [​IMG]
     
  16. Jan 17, 2014 at 10:46 PM
    #16
    maximilian55

    maximilian55 [OP] Well-Known Member

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    True that, Im just gonna ditch my crappy flowmaster raptor 30 dollar exhaust and get maybe a 2525 aero turbine muffler. And if I still have an itch for dual exhaust ill worry about it then.
     
  17. Jan 17, 2014 at 11:39 PM
    #17
    tooter

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    That's not a bad idea. You could always retrofit duals later. I'd also listen to some YouTube videos so you can get a good idea of what the Aero sounds like with a 4 banger. Also take a look at the Aero 2525 XL. It has a resonator built into it.
     

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