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Their website doesnt indicate that they carry
321SS. If you are going to go to the trouble of welding up an exhaust system I'd
make it out of 321, not 304. The Vetterman exhausts that are so popular with the
RV crowd are all 321 and thats for a Lyc with exhaust temps several hundred
degrees cooler.
I can highly recommend Custom Aircraft Parts http://www.customaircraft.com/ .
They are local to me and I've bought from them as well as Burns. Neither is
cheap but their stuff is good. Custom Aircraft will also build complete exhaust
systems as well. They work primarily on certified engines but are willing to
work on anything. Workmanship that i saw in their shop is top
notch.
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Friday, November 13, 2009 11:30
AM
Subject: [FlyRotary] renesis stock
exhaust flange
I didn't come across this fact in the archives
and thought I'd pass it on. the stock exhaust flanges appear to be made
from powdered metal. when you attempt to weld to them the base metal
breaks off very easily. I was going to modify the stock exhaust, then
was talked into a new header, using the original flanges. it's only
money. better to break on the workbench, no? I ordered a new 304
flange from ed klepis today. BTW, Columbia River Mandrel Bending
supplies Burns with parts and costs 1/3 to 1/2 the price, plus sells schedule
10 tubing & elbows [.090 wall] as well. they have been good to
deal with. http://www.mandrel-bends.com/catalog/contact-us.html
kevin
interesting to watch mandrel bending.
they pull this "chain" of brass doughnuts thru the tube while bending
it.
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