Mark Steitle wrote:

Paul,
While at the Moroso web site I noticed their Spiral Flow muffler.  It looks
to be somewhat similar to Tracy's design.  How effective do you think this
would be for a rotary application, if it were built of 321 stainless.  It
looks to be more streamlined than others we've reviewed.  No price was
quoted on their site.

Moroso describes their muffler as follows:

MOROSO SPIRAL FLOW RACING MUFFLERS
Using advanced gas dynamics and sophisticated noise cancellation acoustics,
Moroso engineers have developed a new series of Racing Mufflers. Specially
engineered spiral baffles divide the exhaust flow into two separate paths,
significantly reducing noise levels with minimal backpressure. The
all-steel construction makes them durable - our efficient manufacturing
process makes them affordable!
(END QUOTE)

Mark Steitle

http://www.moroso.com/catalog/categorydisplay.asp?CatCode=35001

I think that is down right brilliant. Not only do the gas pulses
lose energy but they are delayed in the spiral passages and
when combined with the straight through gases they noise cancel.
Now if we can make it live with a rotary it might work great.

Paul Lamar

Ops forgot the picture.

Paul Lamar
 
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