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General Discussion of preventative/corrective maintenance and other technical issues regarding your coach that are not covered in other Mechanic's Corner categories (ex. refrigerators, water heaters, and compressors).

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  #11  
Old 10-12-2010
Turbokitty's Avatar
Turbokitty Turbokitty is offline
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John and gang,

I have the stock galvinized FC muffler. It is 4" in and out. The in/outs are offset. The body length is 30" long. It is in great shape too!

I can bring it to RATS and is available for $40.00

Please advise
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Ryan and Michelle Saari
Timberlake Products Group, Inc.
1985 PT36
1983 FC35RB Left me for Atlanta!
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  #12  
Old 10-12-2010
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iamflagman iamflagman is offline
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Quote:
Originally Posted by Turbokitty View Post
John and gang,

I have the stock galvinized FC muffler. It is 4" in and out. The in/outs are offset. The body length is 30" long. It is in great shape too!

I can bring it to RATS and is available for $40.00

Please advise
I was wondering what the stock muffler looked like, mine must have been replaced at some time, it is a round 4 inch inlet and outlet and apparently is a straight through, although I have had experience with a motorcycle muffler that on the outside appeared to be a straight through design but when it was removed it had a diverter disc mounted mid way through the muffler which routed the exhaust around it and through a chamber within the round shape exterior shell and then out the back.

Here is a drawing I made on my motorcycle VIRAGO TIPS AND TRICKS web site showing what it woeked like before and after, I used a long screwdriver and a hammer to knock the disc out, thus making it a straight through muffler;




I don't know if they make truck mufflers this way, my 'Birds mufflers exterior shell is 7 inches in diameter and the body is 40 inches long. If I were to change it out I would use a shorter straight through design, as you can see in this picture of the generator muffler, there is not much clearance between the two mufflers with the 'Birds muffler visible directly above the generator muffler.


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  #13  
Old 10-12-2010
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I have the stock muffler off an '82 Bluebird and as you stated it "appears" to be a straight through design but it is not. The IMCO I purchased you can see right through it. It did have small half moon baffles designed to catch the exhaust gas and dampen it, but if you install the muffler backwards these are smooth dimples that do not restrict at all.
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  #14  
Old 10-12-2010
davidmbrady
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My muffler has those crescent louvers too. They're about 1" x 0.5" in a spiral pattern. The muffler puts out a strange cricket chirp sound, especially at fast idle. I'll probably experiment with another resonator/muffler sometime soon. I've heard this sound characteristic on other diesel engines, most notably souped up diesel pickups. (chirp, chirp, chirp...)
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  #15  
Old 10-13-2010
mynavion mynavion is offline
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Quote:
Originally Posted by iamflagman View Post


I don't know if they make truck mufflers this way, my 'Birds mufflers exterior shell is 7 inches in diameter and the body is 40 inches long. If I were to change it out I would use a shorter straight through design, as you can see in this picture of the generator muffler, there is not much clearance between the two mufflers with the 'Birds muffler visible directly above the generator muffler.

http://www.pbase.com/iamflagman/image/123986853.jpg
John,

The Magnaflow that I mentioned the P/N for is straight through, not too loud and its stainless. And as you mentioned its shorter, 30" vs. 40" (stock).
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  #16  
Old 10-13-2010
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i got a 5" off the sp i will bring to rats if you all need it i dont
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  #17  
Old 10-13-2010
Frank W. Frank W. is offline
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Quote:
Originally Posted by iamflagman View Post
Frank,

Did you possibly mean a 4 inch inlet / outlet Magnaflow muffler? If so how long, I looked at their online catalog and couldn't find a 4 foot long muffler, can you remember the part number.

Sorry, I missed this question....I was meaning to say 4 INCH inlet/outlets...not a 4' long muffler. If you hit the Magnaflow site below (scroll down a bit - see choices on right side) you can type in variables such as inlet position and other factors and get a list of available mufflers....I would pick the one that best "fits" your specific application and existing "plumbing".

http://www.magnaflow.com/02product/02muffler.asp
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  #18  
Old 01-03-2012
waddawanderer waddawanderer is offline
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Default Backwards Muffler?

When under my bus this weekend, running a new 4/0 power cable from the inverter to the battery area, and resting, I looked up and noticed some writing on the muffler. I grabbed my glasses and the muffler was imprinted with the word "Inlet" and an arrow. The arrow is pointing towards the engine. Now I am no dummy but what the heck sherlock? Besides the potential screw up by the "Direction Challenged" mechanic that installed the muffler, is there any benefit from it being installed backwards? Also, what about engine performance, damage etc...? Honestly I know nothing about Diesel mufflers but have experience with regular gas engine mufflers and to do this on a gas engine would seriously inhibit performance.

I know I know it's a stupid question but hey, just think, everyone will benefit from all your jokes and guidance.

Thanks guys.
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  #19  
Old 01-03-2012
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Randy Dupree Randy Dupree is offline
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I think the inlet end of the muffler needs to be on the engine side.
The exhaust enters from the engine,right?
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  #20  
Old 01-03-2012
waddawanderer waddawanderer is offline
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Default Backwards Muffler?

That's what we all love about you Randy, your sense of humor. Yes sir, to da right. Believe me, when I saw the arrow pointing towards the motor I really didn't say "What the Heck Sherlock." It was much more uncivilized! Finn would ban me if I really told you what I said.

Work environment has been tough lately so when I saw the dam thing installed backwards I said to myself "Not Even When I am Enjoying My Hobby Can I get Away From the Turkeys."

Of course the arrow points away from the engine. I really thought it would be fun and a good laugh for everyone as I share my many wonderments with our Wanderlodge.
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