To All (again),
New subject: I want to use .090 " 321 SS stub-outs on my exhaust flanges,
then change to .065 " 321 SS for the rest of the exhaust tubing. A
slip-joint
will connect the two. My problem is I can't seem to find the .090 " 321 SS
with an I.D. of 2 ". I can find it with 2 1/8 " I.D. Will this work.
Frank Clementi

Good idea.
http://www.ozarktubular.com/product_stainless-steel-pipe.html
Check 2" Sched 10 pipe size. 2.375 OD 0.109 wall.
You don't need 321 for this thick wall. 304 will do.

Ed Anderson made his RV6 rotary exhaust out of this and it doesn't even
discolor :)
It could also do double duty and serve as a cantilevered engine mount :)
Hand railing.  http://www.rbwagner.com/pages/Rbwagner.html

Paul Lamar

Paul, & All,
This is a follow-up on my last post about exhaust parts. I have ordered a SS
exhaust flange from Mazdatrix. The person there said that it is OK to use a
2" O.D. pipe on the exhaust flange. That makes the I.D. on the flange
smaller
than the port. He said that all the racers are doing this. I'm having
trouble
accepting this. Any suggestions? I'm thinking the same size as the port, or
slightly larger. Thanks.
Frank Clementi


For aircraft use where you don't need the last few HP the bigger the better.
as the exhaust gas comes out of the port it expands and slows down. That cools it off
and probably reduces the noise potential although I have no data on that.

Paul Lamar


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