Finn Lasses wrote:

Thanks for the chart, Paul.

 .... SNIP

BTW, Ed, I don't see any flex points in your system?

Finn

I would run separate pipes and separate mufflers like Ed did. I think
you could use 0.035 316 SS. By the time you get back to the mufflers
the exhaust should have cooled off a bit and they should last longer
than 1000 hours such as Tracy got out of his. 16 pounds seems a lot
for mufflers. I like your idea of opening the front of the concentric

pipes.

That should cool the guts without increaseing the noise too much as
the slipstream should flow a lot of cooling air through there. This is a

picture

of the early Power Sport engine with the 30 inch tuned pipes.

Paul Lamar

  Finn,

Ed Anderson wrote:

Regarding flex points,  there is a "ball" joint between each header and
muffler to handle the radial twitches.  Also the configuration  between the
header and muffler pipe is a "slip" joint to allow for axial expansion.  No
cracks thus far.  I agree with Paul that by the time the exhaust gets back
to the muffler area 0.035 SS should have no problem handling it and it would
be much lighter in weight.

Ed Anderson

 
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