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| Mine was a tangential design with a perforated tube down the center. It was compact and very quiet, but caused high EGT's at WOT. Lynn Hanover has commented that the rotary needs a free-flowing exhaust to really perform. I suspect the gasses were getting trapped "swirling" around and around, but had trouble making their way out through the holes in the perforated tube. I switched to a DNA muffler and found gobs of new power, and more noise too. So, choose a muffler with care.
Mark
On Wed, May 16, 2012 at 9:08 AM, Ernest Christley <echristley@att.net> wrote:
How restrictive was your muffler?
Mark Steitle <msteitle@gmail.com> wrote:
>Brian,
>
>I had high EGT's at one time. Turns out it was due to an overly
>restrictive muffler. The high EGT's damaged the o-rings resulting in an
>engine overhaul. Could this possibly be at the root of your high EGT
>readings?
>
>Mark S.
>
>On Tue, May 15, 2012 at 8:51 PM, <bktrub@aol.com> wrote:
>
>> My engine is now running just the way it should, temps were 180 or lower
>> on a 75 degree day, but my EGTs have always been high, really high- above
>> 1800 almost all the time. I think it may be a calibration issue. My egt
>> sensors are about 3 inches downstream of the exhaust ports, and I am using
>> Tracy's EM2, calibrated at the stock settings. When the engine is stone
>> cold, the egt's read about 230 degrees, which I assume is normal because
>> the sensors are meant to operate at a much higher temperature. Any thoughts?
>>
>> Brian Trubee
>>
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