OK Jerry the muffler will fit fine if you make it 10 inches long
instead of
12. Here is the 3D. Six inch diameter can. 2.5 inch down pipe.

Paul Lamar

Thanks Paul,   getting an engine mount and exhaust system to coexist
has been a head ache since the first day. I hope this is the solution.
Facing this problem over and over is "exhausting."         In your
drawing what is the distance from the firewall to the prop flange face
or to the Barry mount centers?   I will build accordingly.     Jerry

37 inches. The rad is currently 19 inches wide but there is still room
along side for a stock 5 inch wide oil cooler. The length of the rad is
currently 17 inches overall. It ends at the motor plate. You could pick
up several more inches on rad  length to a common 24 inches overall by
(19 inch core) using  a side exhaust. In fact the side exhaust would
get the heat
out better. Many larger airplanes use side exhaust with no problem.
Monitor the CO in the cockpit and use diverters or turbulators to
divert the exhaust gases. Also seal the doors well. Inflatable
door seals are easy to make and they also do wonders for cockpit noise.

Paul Lamar

-Jerry Hey wrote:

  Ed,  here is a little more of Paul's and my conversation this morning.
   You can go ahead with the muffler except for the tailpipe which can
go a couple of different ways.  Don't do it until you have your engine
in the mount.  Maybe I will come down at that time.  Recalculate how
much money you need to get started  and I will  a check.   Paul is
getting the raw Schertz beams made and will ship them to me soon.   I
have an old, rusted motor mount that I could adopt to the the new beam
for  your engine mount.   We are making progress.    regards,  Jerry

p.s. it is still important to keep the exhaust pipes a short as
possible.

 
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