Good flight Paul, Please post info on the VAM results ASAP!
Bill Jepson

Worked like a charm. Not particularly quiet at 116 db 3 feet away
but that can be fixed. More later.

Paul Lamar

Here is Tracy with the base set up. 98 to 102 db 3 feet away.
I put my hand in front of the muffler and little or no exhaust
gas was exiting. Even less at 5000 to 6000 RPM. This is the first
cut with the end of the center pipe adjacent to the start of 
the three inch exit pipe. There is room there for optimization
but optimization is not really needed IMHO.

Of course I could not hold my hand behind it for ANY length of time :)
We were not able to get the 90 degree down pipe in there between the
end of the muffler and the firewall so we tested it without the
down pipe. I am sure it would have been quieter with the down pipe.

Thanks to Ed Klepeis for building the stainless steel prototype.
I'll be testing it some more when I get the dyno done.

Paul Lamar
 
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