Dual stacks vs single stack

Discussion in 'Trucks [ Eighteen Wheelers ]' started by choo choo train, Apr 23, 2008.

  1. choo choo train

    choo choo train Light Load Member

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    What are the advantages/disadvantages of having dual exhaust stacks as opposed to single?
     
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  3. Muleskinner

    Muleskinner <strong>"Shining Beacon of Chickenlights"</strong>

    I'm sure somebody will come along and argue with me,but I know of no disadvantages for dual stacks unless they are rough and need to be replaced because they'll cost ya more than a single.

    Although you run out of a single headpipe/downpipe ,it still helps get rid of the back pressure which is not really your friend.My personal favorite exhaust is a gutted resonator w/ 7" straights with bullhauler turnouts.The older I get the less I like the look and sound of the 8"s.Who'd a thunk it.:biggrin_25525:
     
  4. dieselhound

    dieselhound Medium Load Member

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    I will have to agree with Mr. Skinner. I think it's all about the look. If you have a pyrometer, it will be in your down pipe after your turbo. That's a single pipe. So in short, you look better with two.
     
  5. 379 Peterbilt

    379 Peterbilt Medium Load Member

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    Ditto. It is all about the look. Personaly, I love the dual stack look. But I'm old school.

    When I see a single stack truck (the ones running verticle just behing the passenger door), I liken it to a one armed NFL referee trying to signal 'touchdown'.

    Image is everything..........
     
  6. MedicineMan

    MedicineMan Road Train Member

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    if you are a power player you have to have dual. a single is just too restrictive.

    the down side? cost. that's all.

    Nothing looks better on a pete then 6's. 7 at most. Anything larger is for the circus wagons
     
  7. panhandlepat

    panhandlepat Road Train Member

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    Can You Get "true Duals" On A Diesel?
     
  8. MedicineMan

    MedicineMan Road Train Member

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    on a v8 diesel you can.

    but it doesn't need to be "true" duals. You don't get restriction from the single pipe off the turbo you get the restriction from the muffler which is why you need two mufflers.

    Also if you are running over about 500hp you HAVE to have dual intake filters. I know some don't but it hurts them
     
  9. panhandlepat

    panhandlepat Road Train Member

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    OIC. LOL i know my gasoline engines (particularly the SB 350) well but relatively little about deisel
     
  10. MedicineMan

    MedicineMan Road Train Member

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    actually you couldn't on a v8 diesel either as you have the exhaust going through one turbo into one pipe.

    Even the twin turbo setups I know of blow from one turbo to the other not one turbo per side.
     
  11. MACK E-6

    MACK E-6 Moderator Staff Member

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    But theoretically you could still make it that way, couldn't you?

    On an inline 6, in a truck with plenty of room under the hood such as a 379 or a Mack Superliner, could you put a turbo on the front 3 cylinders and another on the back, and have both exhausts on opposite sides of the truck? Or would there be just not enough room under the hood?
     
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