Bulent Aliev wrote:

Hi Paul, I don't see how you can wrap 1 3/4" SS pipe so tight? Would
love to have this exhaust if someone can make it.
Bulent

What you do is let someone else wrap it. Buy the smallest radius 180 degree
mandrel bends you can find and weld them together. The diameter of the can
is not
critical.

Paul Lamar

  Burns stainless has 321 stainless U bends with a 3" centerline radius.
Their on the ACRE web page. Custom Aircraft Parts right up the road from me
in El Cajon, Ca has 321 U bends also with a CL radius of 2 7/8". They also
carry a lot of other stuff for aircraft exhaust. See:

http://www.customaircraft.com/

  Unfortunately your compact muffler just isnt gonna fit my RV4. I'm gonna
probably go with one or two of Borla's stainless mufflers. See:

http://www.borla.com/

and look at the XR1 race mufflers.

Thanks for the info Paul.

Mike Wills

If its just a muffler you need both Tracy and Dave Atkins go with the tangential
muffler. In Dave's case it weighs four pounds, less the exhaust flanges and is made 
from .035 Inconel. Tracy's is made from .035 stainless. I have never heard Tracy's
airplane in person but Dave's is quieter than a 172. 

What does the Borla XR1 weigh? 
Looks bulky and would not fit a 13B RV4 as well as a tangential. A tangential with a 
side exhaust would be most space efficient leaving room under the engine for the rad.

Paul Lamar
 
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