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Old 07-30-2018, 06:43 PM   #1
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What happens if I reroute my exhaust?

Our tailpipe shoots exhaust straight at our towed vehicle leaving a sooty mess, and so I was curious about rerouting it. Seems like it would be a fairly simple job for a muffler shop, and require about 10 feet of 4" pipe and a few bends. What I was thinking is.....exhaust pipe exits the rear corner of the bus then goes straight up along the body to the roof line, where it then bends a bit so as not to allow rain to enter.
Anyone think this will cause issues with engine performance, or see any other potential reason not to have this done?
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Old 07-30-2018, 06:48 PM   #2
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Our tailpipe shoots exhaust straight at our towed vehicle leaving a sooty mess, and so I was curious about rerouting it. Seems like it would be a fairly simple job for a muffler shop, and require about 10 feet of 4" pipe and a few bends. What I was thinking is.....exhaust pipe exits the rear corner of the bus then goes straight up along the body to the roof line, where it then bends a bit so as not to allow rain to enter.
Anyone think this will cause issues with engine performance, or see any other potential reason not to have this done?
Send pics once it's done. Stacks on a bus!!!
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Old 07-30-2018, 06:49 PM   #3
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Bring them out and up the sides behind the drivers seat like a big rig.
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Old 07-30-2018, 06:53 PM   #4
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Originally Posted by Drew Bru View Post
Our tailpipe shoots exhaust straight at our towed vehicle leaving a sooty mess, and so I was curious about rerouting it. Seems like it would be a fairly simple job for a muffler shop, and require about 10 feet of 4" pipe and a few bends. What I was thinking is.....exhaust pipe exits the rear corner of the bus then goes straight up along the body to the roof line, where it then bends a bit so as not to allow rain to enter.
Anyone think this will cause issues with engine performance, or see any other potential reason not to have this done?
As long as you drill a drain hole in the bottom elbow (1/4") you can run a rain hat flap. Of course you might get a Detroit rattle at idle. Flap flapping.
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Old 07-30-2018, 07:03 PM   #5
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As long as you drill a drain hole in the bottom elbow (1/4") you can run a rain hat flap. Of course you might get a Detroit rattle at idle. Flap flapping.
Oh yeah stop by the dress up Shoppe and get the chrome grating for that stack!
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Old 07-30-2018, 07:06 PM   #6
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As long as you drill a drain hole in the bottom elbow (1/4") you can run a rain hat flap.

That was a thought, too. I kinda like that flap.
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Old 07-30-2018, 08:16 PM   #7
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The chrome grating is a must. Not only will it look cool, it will keep you from being sued if someone happens to grab the stack when it is hot. Jack
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Old 07-30-2018, 08:26 PM   #8
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I took the easy method and turned the cutoff pipe out just in front of the left rear tires. No signs of soot and helps melt the ice buildup around those wheels. Also keeps my black tank warm so the valve doesn't give me trouble to dump it.
Next bus may get stacks.


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Old 07-31-2018, 08:39 AM   #9
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The chrome grating is a must. Not only will it look cool, it will keep you from being sued if someone happens to grab the stack when it is hot. Jack
That's actually a pretty good point that I hadn't thought about
Does anyone see any issues with creating some sort of weird backpressure or somehow screwing up the flow? It seemed copacetic to me, but then I'm a woodworker not a gearhead.
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Old 07-31-2018, 08:52 AM   #10
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I'm doing what you intend but going with 5 in pipe before the bend up to lessen back pressure. Remember you are adding 10-12 feet of exhaust to an already 30 ft of bus.
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