Jerry Hey wrote:

  Paul,  this is a question I asked a couple of days ago that I think
you missed.   The issue is using .065 304 SS  donuts for the ends of
the simple tangential can similar to the VAM.  These look good and make
fabrication with the cool tube, easier.  The downside is that it is 304
not 321.  The argument goes like this:      1.  The ends of the muffler
are not in the direct exhaust blast.   2.  The exhaust gases in our
muffler are expanding and losing heat. 3.  The cool tube will lower the
temps inside the muffler. The .065  304 is  sufficiently heavy to
resist overheating.

The muffler ends can be made  out of flat 321 but it will not look
nearly so trick and it will cost more in  materials and labor.  I don't
care about the additional labor or expense, but I don't want them if
they are not necessary.  I really like the appearance that comes with
the 304 donuts.

Ed will be building the exhaust.  If it is a success, he will offer it
for sale.         Jerry

Agreed. I think .065 is plenty thick but a bit heavy.
I think .049 would be better for that part. The can itself
should be .065 as that gets the direct blast.

Paul Lamar
 
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