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Old 09-21-2015, 06:29 PM   #1
Mini-Skoolie
 
Join Date: Aug 2015
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Year: 1997
Chassis: International 3800 AmTran (wish it was a TransAm)
Engine: DT466E
Upright exhaust conversion on front-engine

I have a 1997 39' International front-engine dog-nosed bus. I was curious if it was possible to move the exhaust to an upright stack near the front cab. As it is now, the exhaust pipe runs all the way down to the very end of the bus.

I'm not sure why it was built this way (maybe to reduce clearance/help kids to not breath exhaust fumes?") but I was wondering if it was possible to make it upright like most semi-trucks have.

Are there disadvantages to this? Does it affect emissions in any way? I would like to have a little bit more working room under the bus as well as the potential to heavily modify the back-end (maybe cut a section off)

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Old 09-21-2015, 08:27 PM   #2
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A short stack coming up on one (or both) sides would be very cool. I have seen it done on a skoolie before, just don't know where the pix might be. As long as there is a standard rain cap on top...why not?
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Old 09-21-2015, 09:02 PM   #3
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Accordian has upright exhausts on the back of his.

http://www.skoolie.net/forums/f11/be...-yet-6855.html
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Old 09-21-2015, 09:08 PM   #4
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Old 09-21-2015, 10:24 PM   #5
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It doesn't seem to safe to have the exhaust so close to the diesel fill??
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Old 09-22-2015, 02:26 AM   #6
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Jake C also had his bus running a stack.

His build thread.
http://www.skoolie.net/forums/f11/pr...utus-5059.html



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Old 09-22-2015, 02:32 PM   #7
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The state mandates where it is on the school busses(in ohio, it's either out the back or in front of the driver's rear tire).

I don't see a problem with running a stack. I'd prefer to see it run on the opposite side of the fuel tank. I'd also put some sort of a guard on it to keep someone from touching it and getting burnt. I don't think you'd need a rain cap with the distance it is from the engine, just drill a little hole at the bottom to let any water out.
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Old 09-22-2015, 02:35 PM   #8
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after towing with a skoolie with the standard out the back exhaust.... a stack sure would keep that trailer cleaner.
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Old 09-22-2015, 03:28 PM   #9
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Quote:
Originally Posted by turf View Post
after towing with a skoolie with the standard out the back exhaust.... a stack sure would keep that trailer cleaner.
Yeah, that is another huge reason I want to swap it out. I'd hate for that exhaust to infect my pop-up trailer.
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Old 09-22-2015, 08:14 PM   #10
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I wonder how high one would need to go to avoid exhaust condensing on roof solar panels.
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Old 09-23-2015, 08:20 AM   #11
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The exhaust on my bus originally came out the rear under the bumper. Last fall I routed the exhaust to come out the right-hand side just forward of the rear wheels. The benefits of this set up are :
A. I won't squash the tail pipe when driving through ditches;
B. Fewer bends in the exhaust. (although the single bend is 90° instead of multiple smaller bends);
C. Less exhaust gases hitting the trailer;
D. WAY shorter exhaust run.

I personally would not want an external vertical exhaust. They stick out too much from the side of the bus, they can be dangerously hot and in many cases they will have several more bends than the original exhaust set up.
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Old 09-23-2015, 11:53 AM   #12
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Clarification

Quote:
Originally Posted by jazty View Post
The exhaust on my bus originally came out the rear under the bumper. Last fall I routed the exhaust to come out the right-hand side just forward of the rear wheels. The benefits of this set up are :
A. I won't squash the tail pipe when driving through ditches;
B. Fewer bends in the exhaust. (although the single bend is 90° instead of multiple smaller bends);
C. Less exhaust gases hitting the trailer;
D. WAY shorter exhaust run.

I personally would not want an external vertical exhaust. They stick out too much from the side of the bus, they can be dangerously hot and in many cases they will have several more bends than the original exhaust set up.
Forgive my ignorance, what do the #of bends and length of exhaust run have to do with anything? Do they create extra backpressure or something which reduces performance?

I have already bent my rear-pipe slightly from bottoming out Did you buy a new pipe to make your side exh or just use parts of the old one?

I like this idea, but I'm not sure I can do it given that my bus has 4 storage panels on either side... would there even be space?



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Old 08-23-2019, 08:37 AM   #13
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Found out something cool. Fairbanks AK have upright exhaust stacks on their school buses.


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