MochetVelo Posted October 18, 2019 Share Posted October 18, 2019 (edited) The muffler on my 1911 Hupmobile is shot, and I don't even know if it's the original or not. It's round, about 5-1/2" D X 15" L, with a 1-1/4" O.D. pipe centered on each end. Could anyone tell me what is correct? I don't see it depicted in the Parts Catalog. A muffler similar to mine is available custom-made from Waldron Exhaust. for $100. Phil Edited October 18, 2019 by MochetVelo (see edit history) Link to comment Share on other sites More sharing options...
trimacar Posted October 18, 2019 Share Posted October 18, 2019 The correct muffler for you car is not a "one piece" muffler. It should have cast ends, with a small pipe at the back that bends down almost immediately out of the muffler. There are internal baffles, the whole thing held together with through rods. My car is not accessible right now to take a picture. The attached picture shows one end of the muffler, a new casting, and you can see the places where the internal ridge ends and those were the two through bolt holes. I had a few new end casting made a few years ago, all gone now. Oh, I found pictures of intake and exhaust. Note how one end of muffler (rear I think) has a set screw for holding small pipe, other end has a cast housing that's sawed though horizontally and vertically, with a bolt to clamp intake pipe. Link to comment Share on other sites More sharing options...
MochetVelo Posted October 18, 2019 Author Share Posted October 18, 2019 Thanks, David. Is the muffler about the size of mine (5-1/2" X 15")? Phil Link to comment Share on other sites More sharing options...
trimacar Posted October 18, 2019 Share Posted October 18, 2019 That size sounds about right, yes.... Link to comment Share on other sites More sharing options...
MochetVelo Posted November 6, 2019 Author Share Posted November 6, 2019 Not sure if my muffler is original, but it does have the cast iron ends. I sent it to Waldron Exhaust. They said they could re-use the ends and make a new muffler body. I'll let you know how it comes out. Phil Link to comment Share on other sites More sharing options...
trimacar Posted November 7, 2019 Share Posted November 7, 2019 The back plate looks correct. Most had a down turned pipe at th discharge of the muffler. End of which was slightly smashed oval. Front casting should have some cast-in information.... When I redid my muffler, just took it to a local sheet metal shop, duplicated perfectly by them... Link to comment Share on other sites More sharing options...
MochetVelo Posted November 7, 2019 Author Share Posted November 7, 2019 Yes, the tailpipe is compressed into that rear clamp. The pipes themselves look in good shape. Speaking of the pipes, is the connection to the exhaust manifold flared, or does it fit inside the manifold? Phil Link to comment Share on other sites More sharing options...
trimacar Posted November 7, 2019 Share Posted November 7, 2019 I believe it just slips into the exhaust manifold, no flare... Link to comment Share on other sites More sharing options...
Max BURKE Posted November 12, 2019 Share Posted November 12, 2019 G,day Huppers. On our 1911 model D the muffler had an inner and an outer skin tightly rolled together with a sheet of soft asbestos between the layers There were baffles inside. I went to the shop that refurbish aluminium fire extingushers and from the scrap heap selected a discarded thick wall body. With a small adjustment in the lathe it fitted the original ends. No baffles and guaranteed for life! Max BURKE Nulkaba 2325 Australia Link to comment Share on other sites More sharing options...
MochetVelo Posted November 12, 2019 Author Share Posted November 12, 2019 You're too clever, Max! I recall putting a brand new muffler in my '23 Ford T. I started the car, and the muffler immediately exploded. A timing problem, I think. I don't think that will happen with the Hupp. Phil Link to comment Share on other sites More sharing options...
MochetVelo Posted December 5, 2019 Author Share Posted December 5, 2019 The rebuilt muffler should arrive shortly. It needed a new shell and internal tube (5 hours work). Phil Link to comment Share on other sites More sharing options...
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