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Straight pipe envy

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#1 Steve C.

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Posted 30 March 2012 - 06:59 PM

This guy evidently thinks his Dodge looks real mean this way, but he's got enough pipe for 1000 cubic inches. Wondering if he's trying to compensate for other things which might be smaller than average. ;)

Which got me wondering, how does straight pipe size affect engine performance in a turbo'd diesel? I've heard different theories, but figured some of you guys would know the facts.

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#2 loadboss


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Posted 30 March 2012 - 08:45 PM

they r aussie stacks. only look to be about 6 inchs. i only have one 7 inch flapper stack on my cummins :wub:

#3 oneharvester


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Posted 30 March 2012 - 08:48 PM

have seen alot of these, must be the next new thing
long live red

#4 73IH810


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Posted 30 March 2012 - 09:38 PM

why would an inline 6 need dual stacks?.....and that guy probably doesn't know what a rain cap even is.

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#5 cpg


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Posted 30 March 2012 - 09:44 PM

From what I hear anything over 4 inches is just for show on pickups as 4 inch pipe is able to flow enough exhaust to keep up with even a performance pickup-size diesel.

#6 international3088MFD


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Posted 30 March 2012 - 09:59 PM

i like stacks... as long as its not THAT big, and that they aren't on my truck.. B) :lol:

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#7 john e. grott

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Posted 30 March 2012 - 10:41 PM

Each to his own , but those are those are a bit much . Heck you don't see to many semies with something that big .

#8 tcmtech


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Posted 30 March 2012 - 11:27 PM

The redneck hillbilly stacks have been showing up around here for at least 5+ years. :(

We got a local kid running around Minot that has dual 8" on his Chevy 1500 pickup. I have been quite tempted to go and drop a few kids size bowling balls down them when its in a parking lot some day. :ph34r: :lol:

So given the pipe size to engine displacement ratio I calculated that the 549 V8 in my old fire truck will need the culverts from my driveway for me to be cool! :P


If I said something that offended you I wasn't being serious unless of course you're easily offended.  Then I obviously meant it.  :ph34r:  

#9 Rick G.

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Posted 31 March 2012 - 05:15 AM

I think they're ridiculous, but oh well, not mine. But I have a question. How do you install those. I mean you would have to make holes in the truck bed, no?

Or, are the pipes skinny or flattened to run up the gap between the cab and the box, and then get made large like that after they rise above the top edge of the bed's box? I've never seen a setup like that from up close in person, just from passing by on the road.

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#10 Eason


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Posted 31 March 2012 - 05:30 AM

I personally think they look goofy. The guys that usually run them run chips and like to see them smoke. Gives the EPA and other tree huggers reason to push for tighter emissions. Eason

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