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1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
#1
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37Blanche
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I am going to replace the exhaust system on my 1937 120. When ordering, there are options to have pipes cut or full length. Shipping is the cost difference, but they (Waldron) told me I would need to weld the front exhaust, but not the tail pipe.

Question: Welding aside, is there benefit to having them in pieces for installation vs. full pipes? Or is install the same? The exhaust system looks to navigate the frame and I am just not sure if a full pipe(s)would make that a challenge?

Thoughts appreciated!
Ben

Posted on: 2023/11/27 14:31
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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Bob J
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I did mine as two pipes and the muffler. Starting at the manifold back was how I installed it, leaving everything loosey-goosey until complete, the only issue I had was getting it over the differential, (like every other exhaust tail pipe I have done). All that was needed was to unbolt the diff from the spring perch and shock link on the passenger side and drop it about 6 more inches. This was on my garage floor with the car on jacks. You may not even have to that if you have a hoist, but even so it might of added 10 minutes to the job.
Bob J.

Attach file:



jpg  tail pipe installed.JPG (261.45 KB)
225215_6564f0d457310.jpg 1600X1200 px

Posted on: 2023/11/27 14:41
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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37Blanche
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Thanks Bob! Looks pretty straight forward.

Posted on: 2023/11/27 14:49
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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Bob J
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Sorry, that should be unbolt the shock link and the SWAY BAR, that will give you the clearance you need, the spring perch remains untouched. Sometimerz kicking in!
Bob J.

Posted on: 2023/11/27 15:28
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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Packard Don
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Per my 1951 Henney-Packard blog, I bought a very long NOS tailpipe and shipped it full-length via Alaska Air Freight which was very reasonable. The only caveat is that you have to have an airport nearby that is served by them and pick it up there, and the shipper has to be willing to take it to the airport on their end. Jackie Bruner at Max Merrett handled it for me once we came up with the idea!

Posted on: 2023/11/28 11:44
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
#6
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37Blanche
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Bob, Did your exhaust have a resonator? Could you add a picture of the muffler (and resonator). I am trying to see the fit within the frame.

Thanks!
Ben
Quote:

Bob J wrote:
I did mine as two pipes and the muffler. Starting at the manifold back was how I installed it, leaving everything loosey-goosey until complete, the only issue I had was getting it over the differential, (like every other exhaust tail pipe I have done). All that was needed was to unbolt the diff from the spring perch and shock link on the passenger side and drop it about 6 more inches. This was on my garage floor with the car on jacks. You may not even have to that if you have a hoist, but even so it might of added 10 minutes to the job.
Bob J.

Posted on: 11/30 12:25
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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Bob J
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I did not go with a resonator. I had my entire exhaust custom made, but it is different than a regular 37 as my car has a 53 Patrician 327 in it, so uses a 2 1/4" diameter pipe set-up.
The muffler shot is below if you like. I believe a resonator would occur downstream from the muffler, likely below the gas tank.
Bob J.

Attach file:



jpg  Muffler installed.JPG (282.96 KB)
225215_656907dfb728d.jpg 2048X1201 px

Posted on: 11/30 17:08
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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Bob J
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I did up this drawing of the muffler for the fabricator based on dimensions in the 53 specifications found on this site. I believe you can find specs for the 37 here as well.
Bob J.

Attach file:


pdf Muffler.PDF Size: 216.92 KB; Hits: 108

Posted on: 11/30 17:12
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Re: 1937 120 Exhaust Replacement (Cut Pipes or Full Length?)
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37Blanche
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Thanks for this Bob

Posted on: 11/30 18:02
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