Wraparound Pitts Muffler Modifications
02-01-2013, 08:56 AM
#1
Thread Starter
My Feedback: (10)
Join Date: Sep 2004
Location: Displaced Canadian in Central Texas TX
Posts: 2,601
Likes: 0
Received 0 Likes
on
0 Posts
Wraparound Pitts Muffler Modifications
I originally posted these pictures on the GS TF P-40 Thread, because of a problem some guys were having with cracking & weld failures on certain Wraparound Pitts Mufflers. I didn't want the same problem to occur, so I made some Modifications on my Muffler. I want to share these pictures of my modifications with others who have or had similar problems, not necessarily on the P-40, but with the Wraparound style Pitts Muffler.
The way I see it with this style or design, the one end of Cylindrical Muffler is unsupported, and with the normal occurrence of Engine Vibration and Shaking, allows further and excessive vibration to the unsupported end of the Muffler, which can cause the muffler mounting bolts to loosen, creating even more vibration and shaking contributing to eventual weld failures and cracks where the Rectangular Manifold is Welded to the Cylindrical Muffler.
The nice thing about these Modifications is that the unsupported end of the Muffler is now supported or attached to the engine, so it vibrates and moves with the engine, instead of bracing or supporting it to the firewall and moving or vibrating independantly which could allow for weld failures.
Not shown is the Lockable Wire through the bolt heads, this was done later after I ran the engine and re-tightened the bolts.
The way I see it with this style or design, the one end of Cylindrical Muffler is unsupported, and with the normal occurrence of Engine Vibration and Shaking, allows further and excessive vibration to the unsupported end of the Muffler, which can cause the muffler mounting bolts to loosen, creating even more vibration and shaking contributing to eventual weld failures and cracks where the Rectangular Manifold is Welded to the Cylindrical Muffler.
The nice thing about these Modifications is that the unsupported end of the Muffler is now supported or attached to the engine, so it vibrates and moves with the engine, instead of bracing or supporting it to the firewall and moving or vibrating independantly which could allow for weld failures.
Not shown is the Lockable Wire through the bolt heads, this was done later after I ran the engine and re-tightened the bolts.
