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Trucks [ Eighteen Wheelers ] Roll On Big Mama. Forum/Discussion about Eighteen Wheeler Trucks. What truck do you like or dislike? Is your favorite truck a Mack, Peterbilt, Kenworth, Marmon, Volvo or Freightliner? Which diesel engine do you prefer; Detroit Diesel, Cummins, or...

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Old 04.23.2008
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Dual stacks vs single stack
What are the advantages/disadvantages of having dual exhaust stacks as opposed to single?
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Old 04.23.2008
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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.
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Old 04.23.2008
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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.
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Old 04.23.2008
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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..........
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Old 04.23.2008
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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
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Old 04.23.2008
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Can You Get "true Duals" On A Diesel?
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Old 04.23.2008
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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
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Old 04.23.2008
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Quote:
Originally Posted by MedicineMan View Post
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
OIC. LOL i know my gasoline engines (particularly the SB 350) well but relatively little about deisel
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Old 04.23.2008
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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.
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Old 04.23.2008
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Quote:
Originally Posted by MedicineMan View Post
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.
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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