Chuck_Harbert Wrote:
Yes, I do know someone who can fabricate Inconel exhaust manifolds
reasonably for Mazda's. His name is Mark Sedickas who owns Mark's Welding
and Fab in Graham, WA  Days-253-852-0540, evenings 360-893-5528. pager
206-314-6882.

Mark did my exhaust manifold (turbo 20B) for about $300 (it was p/o a lot
of other work). He gets scrap cuttings of inconel sheets from a local
source, and then he rolls it (min 2.5" dia) to make manofolds and mufflers.
Dave Atkins sends him a lot of work. He is a certified Aircraft welder and
does beautiful work.

Jim Sower wrote:

Would it be possible to get a good enough drawing of the 'spiral-into-plenum'
idea that has been discussed to have him make a bid on some number of

them?  I

would guess that (barring the remote (IMO) possibility that carbon fiber

could

withstand exhaust temperatures) a really good fabricator with a source of
'affordable' inconel would be the best source for all of us.
Just a theory ....       Jim S.

I think the carbon fiber is being advocated for only the intake manifold.
I also think it needs to be tested on a dyno first.

Paul Lamar

Carbon-carbon (carbon fibers in a carbon matrix) might work but all the
current fab methods are VERY expensive.  Inconel or 321 stainless are
a lot more affordable.

Bill

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org