So what is the difference between straight pipes and stacks, or is there no difference? Is one kinda of like a slip on exhaust rather than a full system? I’m asking this since some trucks have stacks or straight pipes but still sound muffled, while other trucks are just stupidly loud. And this isn’t with different pipe sizes or engines; identical trucks with the same engines and size stacks sound differently
So my guess is that there might still be mufflers under the cab? Some people might put stacks just to make the truck look nice(removing the mufflers from the side of the truck), but keep the mufflers under the truck? Or do some stacks have mufflers inside so they just look better but don’t actually sound louder? I’m not sure, so let me know
Edit: So what about Lincoln Chrome/Monster stacks? Do those have mufflers? Or are they full on straight pipes?
Here’s an example of 8 inch stacks that still sound muffled
Straight Pipes Vs Stacks
Discussion in 'Ask An Owner Operator' started by haulingassgettingpaid, Sep 30, 2019.
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Last edited: Sep 30, 2019
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Dont mind the stacks, But the Pogo stick has gotta go- Never liked that- looks stupid Put an 8 ball on the end,a skull whatever,thats fine....
FlaSwampRat, olddog_newtricks, x1Heavy and 1 other person Thank this. -
Agree on the pogo. Against a drab plastic of a company tractor... ugh.
Anyway Ive had trucks that were all kinds and I quit listening to the stacks a long time ago with one exception. That whining weedeating character of a neutered company granny holding at 61 mph. Makes one reevaluate their existence on this wasteland of non trucking. /sarcasm.
We had a pete pass through not long ago, full kitty 4 inch 5 inch pipes two and she was working on her low range at the rail. Snorting as she got through it.
That is always something, but we better enjoy those while we can.MACK E-6 Thanks this. -
Strait pipes are usually stacks, just unmuffled.
Some trucks come with the muffler underneath, instead of on the side, it looks like straits, but is actually muffled. The reason the manufacturers do this is clearance on the wider cabs we have these days though, not looks.Ky Flash Thanks this. -
That video is cringe worthy
Fatboy42, TankerP, MACK E-6 and 1 other person Thank this. -
Stacks are just exhaust pipes that run vertical up behind the cab doors or behind the sleeper. They can be straight piped (no muffler) or have mufflers.
mosrock Thanks this. -
D.Tibbitt Thanks this.
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My 77 IH Eagle with twin straight 5" pipes. Bought that truck new,removed the mufflers,and put those on. To this day,my hearing is diminished,because of that truck,and the dragstrip,and dragcar,all to some extent. I was young,thought it was cool,that Cummins made ungodly noise when you kicked the Jake in,esp. under a bridge or in a tunnel.
The absolute loudest truck I ever drove or heard was an old Emeryville International,with a naturally aspirated NH 220 Cummins,and Jake,5" straight pipe. You have no turbocharger to restrict the harsh high compression Jake bark,and to this day,I've never heard a truck that loud,and it was 50 years ago.
x1Heavy, FlaSwampRat, Intothesunset and 3 others Thank this.
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