> > > >Jerry Hey wrote:
>> >>
>> >> Is there a significant performance gain with the tuned version? I
>> >> have got the impression that exhaust pipe length is not so important
>> >> as unrestricted breathing. Has anyone built one of
these mufflers?
>> >> Is the simple version just an empty can that the exhaust dumps into
>> >> from the side? What type of Stainless? Is ".040 inconal" a
>> >> complete specification? Jerry
>
>> >In theory yes Jerry on the tuned version. Not to my knowledge has any
>> >one built one yet. I am not sure it would fit in your cowl as
the diameter
>> >is about 10 inches while the engine is about 6 inches from center line
>> >so the width of the cowl in that area would have to be about 32
>>or more inches
>> >wide. Brian Trubee designed a simplified version with square
runners welded
>> >up from flat sheet that you might want to try. It is possible
to make it
>> >slightly more compact as the runners could be rectangular.
>> >
>> >Just an empty can. .049 thick 316 stainless ought to be about right.
>> >0.065 thick 316 SS would probably make it bullet proof.
>> >Inconel (pure nickel and chrome) is great but expensive.
>> >
>> >Paul Lamar
>
>
>Jerry Hey wrote:
>>
>> >Paul, it is easy to find 6" O.D. SS tubing remnants in this area.
>> >It is used in the vinyards. It is type 304. The gentleman I talked
>> >to thought both 049 and .063, were available, but he did not want
>> >to walk out the the remnant pile to find out. I don't know how 304
>> >stands up to the heat. Very hard on tools as I recall. Jerry
>304 will work. Not quite as good as 316. There are tricks to
>drilling SS. As I recall you need to keep the pressure on and
>keep it cutting till it is done. A plasma cutter is no problem
>however. Tracy just bought a new one. You might find a sheet metal shop
that does commercial kitchen
>
>Paul Lamar
I have a plasma cutter. I used to build the turbo exhaust manifolds
for the "TurboSuzuki" (60 cu. in-- 100hp). I made about 20 of them
before the company went belly up. I'm thinking I will make up a few 304
simple tangential mufflers to experiment with. Jerry
That's great Jerry. I am sure some other people need mufflers on here.
Perhaps you would make some for them too. Both tuned and untuned.
OK folks here is your chance. Bug Jerry for mufflers :-)
Paul Lamar
Easy Paul, I have no idea how to wrap that exhaust pipe around the
muffler. I will stick with the simple tangential. Does anybody have
a throw away case I could use as a fixture?
Jerry
Its easy Jerry. You get four 180 degree bends from Burns Stainless
and weld them in the center to make two 360 degree cut and twisted
donuts.
Brian's version is made from flat stock where you cut out a split donut
side and weld it to the inner can along the bottom of the runner and cover
the outside with flat sheet. Probably a wee bit lighter than the
round tube donut version.
Paul Lamar
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