X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 11 Jul 2009 10:57:04 -0400 Message-ID: X-Original-Return-Path: <2thman@cablespeed.com> Received: from mxo5.broadbandsupport.net ([209.55.3.85] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3753490 for lml@lancaironline.net; Sat, 11 Jul 2009 09:32:11 -0400 Received-SPF: none receiver=logan.com; client-ip=209.55.3.85; envelope-from=2thman@cablespeed.com X-Original-Return-Path: <2thman@cablespeed.com> Received: from [24.143.68.5] ([24.143.68.5:65046] helo=Home) by mxo5.broadbandsupport.net (ecelerity 2.1.1.23 r(18304)) with ESMTP id 5B/4E-31834-034985A4 for ; Sat, 11 Jul 2009 09:31:29 -0400 From: "John Barrett" <2thman@cablespeed.com> X-Original-To: "'Lancair Mailing List'" Subject: LOP in IO360 X-Original-Date: Sat, 11 Jul 2009 06:31:27 -0700 X-Original-Message-ID: <01a101ca022b$e53bc7f0$afb357d0$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcoCK+R1YlnQFcPuRy6xaIdQhCe5WA== Content-Language: en-us I have a Beech Sierra with a Lycoming IO360 engine - have been flying it = for years. In the last month or two, I've noticed the peak EGT (one probe = only) has come down almost 100 degrees. I've also noticed that I can lean to LOP and the engine runs reasonably smoothly, while the last time I tried this a couple of years ago, the = engine would run very rough at LOP in cruise. I normally operate the engine at about 65% power (22 inches of MAP) requiring 8 to 9 GPH to get ~50 = degrees ROP. Anyone have a clue about what I might look for that caused the change? Anyone else able to run LOP with one of these engines? Would I reap the same benefits as with the TSIO 550 running LOP? Regards, John Barrett, CEO Leading Edge Composites PO Box 428 Port Hadlock, WA 98339 www.carbinge.com =A0=20