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Building Muffler From Scratch


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#1 olcowhand ONLINE  

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Posted July 29, 2010 - 06:31 PM

After chores tonight, I started on a muffler for the Ford LGT165. Started with a 4" pipe for the main body.

DSC00260.jpg

The manifold on the engine measured 1.420 so a piece of 1 1/2" pipe works fine for the inlet pipe. I wanted it on the very end, so that the muffler would go further to the right of the tractor, where I plan to put a stack outside through the top front of the body side panel.

DSC00261.jpg

The guts is the hardest part. I used 1 1/2" pipe here also. Lots of drilling. The end of the guts pipe (left in pic) will be flush to the end of the muffler end cap so as to force the exhaust through the smaller holes (1/8") to create some back pressure. You don't want too much, so you need about the same area in little holes as you have coming out of the manifold elbow.
The flat plate welded on left end of inlet is to help protect the baffle pipe from the direct heat coming in from the engine's exhaust elbow. This will help the baffle pipe last much longer.
The large wall forces the exhaust to go through the smaller end holes, then through the baffle chamber (3/16") where this will quiet the exhaust note.

DSC00264.jpg

This is the outlet end of the muffler assembly. You can see where exhaust exits the baffle chamber.

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This is where I am at this point. I have to mount this assembly onto the engine to see how high an exhaust pipe will need to be to exit the side panel where I want it to. The exhaust pipe will go directly into the top of the end of the muffler body, just like the inlet goes through the side.
Will have to do this another time as it's time to cut some GTT decals. May be able to finish this Sunday.

DSC00267.jpg

#2 mjodrey OFFLINE  

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Posted July 29, 2010 - 06:36 PM

Daniel,that looks good so far. You build your mufflers in about the same way as I build mine.

#3 Bill56 OFFLINE  

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Posted July 29, 2010 - 09:15 PM

Looks great, Daniel. Nice fabricating job!!!!!!!

#4 Bolens 1000 ONLINE  

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Posted July 29, 2010 - 09:46 PM

Looks great, Daniel. Nice fabricating job!!!!!!!


:ditto:

Great Fabrication Daniel! :bounce:

#5 Chuck_050382 OFFLINE  

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Posted July 30, 2010 - 07:47 AM

That's awesome that you are building your own muffler. I don't think I would have ver thought of trying that.

#6 ducky ONLINE  

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Posted July 30, 2010 - 08:28 AM

That is really nice work Daniel.

#7 massey driver ONLINE  

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Posted July 30, 2010 - 08:34 AM

It's looking good Daniel.Your right about the inside being the hardest part of the build.Having built a few different styles it's the inside's that take the time.Looking forward to pics of the end result.Larry

#8 olcowhand ONLINE  

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Posted July 30, 2010 - 02:57 PM

Got the silage pits cleaned up & ready for Monday silage chopping, so stole the remaining time to finish my exhaust....well almost. Still need to weld on a support bracket to the right side. I decided to make it one piece, as much easier, plus this exhaust will last for the life of the tractor anyway. Ran to town at lunch & had my local exhaust guru bend me 2 pieces, then I cut, fit, then welded all up. I had him put a 30 degree bend on the end, so I could put a slash "turn out tip" on the end.

DSC00268.jpg

Here it is on the tractor, minus the bracket. She runs very quiet now, but still sounds good. I like the looks of the stack.

DSC00270.jpg

Gotta run.........time to milk those cows again!

Attached Thumbnails

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#9 Chuck_050382 OFFLINE  

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Posted July 30, 2010 - 03:15 PM

Looks good.

#10 Bill56 OFFLINE  

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Posted July 30, 2010 - 04:16 PM

Looks really good mounted on the tractor, Daniel!

#11 mjodrey OFFLINE  

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Posted July 30, 2010 - 04:56 PM

A-1 Daniel,looks really good.:thumbs:

#12 bhts OFFLINE  

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Posted July 30, 2010 - 05:42 PM

That is one heck of a job you did there daniel.:beerchug:

#13 olcowhand ONLINE  

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Posted July 30, 2010 - 06:35 PM

Thanks guys! She sure runs much better with some back pressure. Fires up instantly now & much smoother running.

#14 tractormike OFFLINE  

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Posted July 30, 2010 - 09:07 PM

Daniel, you done good at fabing up the muffler and it looks good on the tractor. Nice job!

#15 DANS2400 OFFLINE  

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Posted August 04, 2010 - 03:32 AM

Hi Daniel,
You're giving me some great ideas to fab a muffler for my Ford LGT145. I've been running a strait short stack. The flame is cool, but I think it's time to fab a muffler.
Keep up the good works.
DANNY




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