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Old 08-08-2014, 11:45 AM   #1
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Muffler question

Does a different muffler make a diff on a diesel performance? If so, are there any helpful/informative hints out there amongst you. I have a 2003 350HP cummins in a Monaco Camelot 40ft 3 slide side radiator.
Aero muffler?
Thanks
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Old 08-08-2014, 12:28 PM   #2
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Better flowing exhaust can really help the turbo spool up (speak from experience), but just a muffler change probably wont help that much unless you have a really muffler on it now
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Old 08-08-2014, 10:54 PM   #3
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Does a different muffler make a diff on a diesel performance? If so, are there any helpful/informative hints out there amongst you. I have a 2003 350HP cummins in a Monaco Camelot 40ft 3 slide side radiator.
Aero muffler?
Thanks
Lifetime diesel mechanic/engine machinist.

As far as the diesel engine is concerned, the best muffler is no muffler at all. No back pressure equals maximum air flow, maximum turbo boost, maximum horsepower.

In the real world, a compromise has to be established. A balance between horsepower and noise. I have heard that the Aero muffler offers the best of both of those two worlds.

Jim
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Old 08-09-2014, 01:30 AM   #4
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Lifetime diesel mechanic/engine machinist.

As far as the diesel engine is concerned, the best muffler is no muffler at all. No back pressure equals maximum air flow, maximum turbo boost, maximum horsepower.

In the real world, a compromise has to be established. A balance between horsepower and noise. I have heard that the Aero muffler offers the best of both of those two worlds.

Jim
I have to agree and will add more air flow will lower you EGTs as well.
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Old 08-09-2014, 07:08 AM   #5
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OK question in relationship to a post 2009 diesel that has the Particulate filter and DEF system. What would the outcome be of removing the muffler on one of these units? You'd have just the Particulate Filter acting as a muffler.
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Old 08-09-2014, 08:47 AM   #6
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Lindy....Probably a bit more power (free flowing exhaust is good for power), if you can/want to put up with the extra noise
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Old 08-09-2014, 08:58 AM   #7
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I replaced the muffler on a 1999 Diplomat (5.9 ISB) with an Aero Turbine muffler, I could tell the turbo spooled up quicker and also gained some fuel mileage. When I replace the original muffler on my current coach I will use the Aero Turbine muffler again.
It won't be a direct replacement, a local muffler shop could do it without much trouble.
John G.
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Old 08-09-2014, 09:04 AM   #8
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OK question in relationship to a post 2009 diesel that has the Particulate filter and DEF system. What would the outcome be of removing the muffler on one of these units? You'd have just the Particulate Filter acting as a muffler.
If you could find a tuner to delete the DEF system and remove the particuate filter it would be better, but in answer to your question, if there are no sensors on the muffler that can't be moved to new straight pipe or whatever you will use, then I see no reason you can't do it.
John G.
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Old 08-09-2014, 10:09 AM   #9
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Muffler???? What muffler????? Our recently purchased 2000 Dynasty with 350 doesn't have one at all. The air intake at top back cap was even opened up some. She's a little lout doesn't bother us and no one has complained either.
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Old 08-09-2014, 12:18 PM   #10
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I installed a Jones Turbine muffler - I understand it is basically the same thing as the Aero - looks like a stainless glass pack to me - but anyway I installed it on our M-11 powered executive - pretty loud - especially the Jake brake (the M-11 has a pushrod Jake - not an exhaust brake) doesn't bother us at all - the turbo does spool up a little quicker, I haven't driven it enough to know what it will do for fuel mileage - but the interesting thing to me was that it got rid of a lot of rattle at idle we were experiencing inside the coach. The old muffler bolted directly to the frame through some thin rubber isolators - I hung this one off some good hangers and there is way less vibration transfer at idle than we had with the stock muffler.
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Old 08-09-2014, 01:12 PM   #11
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I just replaced my entire exhaust with a strait pipe. Below is the thread.

http://www.irv2.com/forums/f123/resu...ll-196555.html
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Old 08-09-2014, 03:02 PM   #12
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Straight pipe. period.

joe
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Old 08-18-2014, 05:33 AM   #13
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I bought an Aero muffler for my ISB. Only problem is I have 4" and the aero is a 5". Free to anyone that can pick it up in Long Beach, CA
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Old 10-12-2014, 09:04 AM   #14
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Aero muffler

Hey Keith if you still have that muffler I am interested. My e-mail is narrlee@gmail.com
Thanks , Lee
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