X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp801.mail.sc5.yahoo.com ([66.163.168.180] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with SMTP id 941173 for flyrotary@lancaironline.net; Thu, 12 May 2005 10:11:07 -0400 Received-SPF: none receiver=logan.com; client-ip=66.163.168.180; envelope-from=dcarter@datarecall.net Received: from unknown (HELO Davidscmptr) (dcarter11@sbcglobal.net@66.138.56.210 with login) by smtp801.mail.sc5.yahoo.com with SMTP; 12 May 2005 14:10:18 -0000 Message-ID: <0ddd01c556fc$4f6cb9c0$6401a8c0@ip.net> Reply-To: "David Carter" From: "David Carter" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Lumberton is off for Bernie Date: Thu, 12 May 2005 09:10:10 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 > But I would try to figure why the EGT is that high at max power mixture; > which would generally be about 100F rich of peak. Seems about 150F higher > than it ought to be. If there is an "ought to be" for egt and egt is above that, I thought we agreed the only thing that could be wrong is timing - spark plugs are firing too late and you are getting combustion in the exhaust. If timing is right - and you are NOT running such a high octane that the stuff burns so slowly that it is still burning as it goes by the egt probe - then you just don't worry about it - except you might worry about the life of your exhaust system parts. David