"Bass, Jerry" wrote:

I too have been experimenting with mufflers.  I added a Delta Flow 17"
muffler single input to my Dual Pipes. I added second 2" entrance to the
input end of the muffler.
The sound went down so I can talk to the ATC, but the heat build up inside
the engine box has lead to doubts on this. Tracy's design may reduce the
back pressure enough and keep the heat out.

I will add two 4" dia tubes to let the air out of the engine room.  Now, I
have the standard RV6 Outlet, and have added two 1x4" outlets, and 3, 1/2x2"
outlets.  In all, probably not enough. with the two 4" tubes, I would
effectively double the outlets and hopefully increase the flow.
 Photos to follow.  I will be away from this terminal until May 8th.

Jerry Bass

 
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