3" out of the turbo, about a 16" run to the end of the pipe on mine.
Greg Ward

----- Original Message ----- From: "Al Gietzen" <ALVentures@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, May 16, 2009 8:05 AM
Subject: [FlyRotary] Re: 20b Exhaust


Joe;

I used 2 3/4".

Al G

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of jewen@comporium.net
Sent: Saturday, May 16, 2009 5:28 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] 20b Exhaust

I have fabricated my exhaust manifold/tangential muffler for my 20b.  All I
have left is to fit and weld the exhaust pipe.  I would like opinions on the
size the exhaust pipe should be.  This is in a pusher application (Velocity)
with a relatively short run from the muffler to the exit point.  Similar
installation to Al G.

Thanks,
Joe


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