X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 11 Jul 2009 15:42:03 -0400 Message-ID: X-Original-Return-Path: Received: from [69.146.254.20] (HELO arilabs.net) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3753572 for lml@lancaironline.net; Sat, 11 Jul 2009 11:48:17 -0400 Received-SPF: none receiver=logan.com; client-ip=69.146.254.20; envelope-from=Kevin@arilabs.net Subject: RE: [LML] LOP in IO360 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-class: urn:content-classes:message X-Original-Date: Sat, 11 Jul 2009 09:47:25 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Message-ID: <7141427652BB3049A7DBF1084B67805B1E347D@penumbra.arilabs.net> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] LOP in IO360 Thread-Index: AcoCN+7Oyidb1OdjRo2nbjZJtuoA0wABr0Vg From: "Kevin Stallard" X-Original-To: "Lancair Mailing List" Sounds like the fuel/air ration to that cylinder may have changed? Kevin -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = John Barrett Sent: 2009-07-11 08:57 To: lml@lancaironline.net Subject: [LML] LOP in IO360 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 -- For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html