Building Muffler From Scratch
Posted July 29, 2010 - 06:31 PM
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.
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.
This is the outlet end of the muffler assembly. You can see where exhaust exits the baffle chamber.
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.
Posted July 29, 2010 - 06:36 PM
Posted July 29, 2010 - 09:15 PM
Posted July 29, 2010 - 09:46 PM
Looks great, Daniel. Nice fabricating job!!!!!!!
Great Fabrication Daniel!
Posted July 30, 2010 - 07:47 AM
Posted July 30, 2010 - 08:28 AM
Posted July 30, 2010 - 08:34 AM
Posted July 30, 2010 - 02:57 PM
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.
Gotta run.........time to milk those cows again!
Posted July 30, 2010 - 03:15 PM
Posted July 30, 2010 - 04:16 PM
Posted July 30, 2010 - 04:56 PM
Posted July 30, 2010 - 05:42 PM
Posted July 30, 2010 - 06:35 PM
Posted July 30, 2010 - 09:07 PM
Posted August 04, 2010 - 03:32 AM
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.