X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bk0-f52.google.com ([209.85.214.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTPS id 5546722 for flyrotary@lancaironline.net; Thu, 17 May 2012 07:29:23 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.52; envelope-from=msteitle@gmail.com Received: by bkcjc3 with SMTP id jc3so1411576bkc.25 for ; Thu, 17 May 2012 04:28:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=bo2mXxFvc9F1wrp2QJ1JRsPapqUDI9nQp2kl/kd/0LQ=; b=AdHfnrrNrBrjLyF/BYyNlHADyzAplNj6UaH868JptjZbiH6t4OFx5VMdszyODYrSP6 YqW3GPoUg4KBoDxV6Yw50R6RXgn5Z9XqJK0p8rtP+r3HsicQcKxY/O4qItP2+v+bQHYR FNmAaKeygqTBi4rr+8gFHM5c4rM8HJxP/0K63URfoQP+fwjJU7k5SLRCDAPGssRpVlPy 7aaA/Z027mrmn2UKqRsv+NrHngHywDNz0E5ocz6vr/dNR7/kgBFpGze2pVVwtev7k8zD xRweSRuH84UW8WKv1vqMPN75ul0AV/exUw3NuArLIBuDuNrCD7j33oNSLmuMbJyx+8ED 0ysg== MIME-Version: 1.0 Received: by 10.204.151.81 with SMTP id b17mr2471215bkw.52.1337254126218; Thu, 17 May 2012 04:28:46 -0700 (PDT) Received: by 10.205.23.142 with HTTP; Thu, 17 May 2012 04:28:46 -0700 (PDT) In-Reply-To: References: Date: Thu, 17 May 2012 06:28:46 -0500 Message-ID: Subject: Re: [FlyRotary] Re: High EGTs From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015175cabae2aef4804c039bdbd --0015175cabae2aef4804c039bdbd Content-Type: text/plain; charset=ISO-8859-1 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 wrote: > How restrictive was your muffler? > > Mark Steitle 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, 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 > >> > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --0015175cabae2aef4804c039bdbd Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mine was a tangential design with a perforated tube down the center. =A0It = was compact and very quiet, but caused high EGT's at WOT. =A0Lynn Hanov= er has commented that the rotary needs a free-flowing exhaust to really per= form. =A0I suspect the gasses were getting trapped "swirling" aro= und and around, but had trouble making their way out through the holes in t= he perforated tube. =A0I switched to a DNA muffler and found gobs of new po= wer, and more noise too. =A0So, choose a muffler with care.

Mark



On Wed, May 16, 2012 at 9:08 AM, Ernest Christley <= echristley@att.net<= /a>> wrote:
How restrictive was your muffler?

Mark Steitle <msteitle@gmail.com> wrote:

>Brian,
>
>I had high EGT's at one time. =A0Turns out it was due to an overly<= br> >restrictive muffler. =A0The high EGT's damaged the o-rings resultin= g in an
>engine overhaul. =A0Could 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. M= y 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 norm= al because
>> the sensors are meant to operate at a much higher temperature. Any= thoughts?
>>
>> Brian Trubee
>>

--
Homepage: =A0http:/= /www.flyrotary.com/
Archive and UnSub: =A0 http://mail.lancaironline.net:81/lists= /flyrotary/List.html

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