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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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Quote:
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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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Quote:
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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Old 07-31-2018, 08:55 AM   #11
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I did a similar thing, though my reasons were so I would avoid the all too familiar pancaked exhaust under the rear bumper. I turned the exhaust 90 degrees so it exits in front of the passenger side drive wheels.

Something to note is that you don't want the exhaust exiting below a window you like to keep open while driving. You'll certainly smell it while idling in traffic.
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Old 07-31-2018, 08:57 AM   #12
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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.

Good to know it's a possibility! I was just looking some sweet 5" truck exhaust parts online. I'd love to see any pics when you get rolling on it!
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Old 07-31-2018, 09:19 AM   #13
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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.
I want to go with 5" pipe and a high flow muffler.
But I'm going straight back with a chrome downturn end.
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Old 08-11-2018, 03:40 PM   #14
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I don't remember where I saw it but there is a bus someone ran the stacks straight up behind the drivers window. Looked cool and worked really well. Also opens up room under the bus for storage or tanks where the exhaust pipe would normally be.
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Old 08-11-2018, 11:15 PM   #15
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exhaust

i ran my exhaust right behind the frt fender..


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Old 08-12-2018, 02:11 AM   #16
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whiskey runner

That is awesome job there. I would love the time to crawl around that rig to check it out one end to the other..... looks really slick, just the whole vibe that thing gives off...... That is one of those skoolies that attracts all kinds of attention. No flying under the radar with that one.

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Old 08-12-2018, 03:22 AM   #17
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turn my bus into a rv

thanks magna .... my build album is on photobucket but it will not let me post it on here...
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Old 08-12-2018, 04:04 AM   #18
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Almost all of our TC2000 FE school buses came with side exhausts that exited just in front of the driver's side left rear wheels.

I see no reason why you would want to spend the extra $$ to run your exhaust pipe up the back of the bus. Over the years we discovered the most expensive piece of the exhaust system was the piece that went up and over the axle and it was always the piece that rusted out first.

We had to do run the exhaust up on the Gillig at church since it is a rear engine bus. But with a front engine bus a side exhaust is much preferred.

Make sure it exits out the driver's side. Having it go out the curb side means you will stink up your campsite with exhaust instead of the neighbor's campsite.
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Old 08-13-2018, 10:55 AM   #19
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Quote:
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?



005.jpg



Cut the top off a stack, shortened the exhaust, welded on at 40* angle to keep the soot off the ATV's [one's white] seems to be working....3 trips up north and back. 600 kmh round trip.
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Old 08-13-2018, 05:31 PM   #20
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Here is our church bus with rerouted exhaust.

It is a rear engine so there were not a lot of alternatives.
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