X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 15 May 2013 18:42:24 -0400 Message-ID: X-Original-Return-Path: Received: from [137.118.16.45] (HELO smtp0.av-mx.com) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6272788 for lml@lancaironline.net; Wed, 15 May 2013 16:18:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.45; envelope-from=pinetownd@volcano.net Received: from DennisPC (unknown [65.170.220.3]) (Authenticated sender: pinetownd@volcano.net) by smtp0.av-mx.com (Postfix) with ESMTP id 57ACD1C1BCF for ; Wed, 15 May 2013 16:17:44 -0400 (EDT) X-Original-Message-ID: From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] EGT/TIT Calibration X-Original-Date: Wed, 15 May 2013 13:17:45 -0700 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 Hi Giff, Start with something like this: http://www.harborfreight.com/infrared-thermometer-with-laser-targeting-non-contact-69465.html Remove the cowl, run the engine on the ground until you get a hot EGT reading on your suspect gauge. Shut the engine down and leave the suspect gauge powered up. Shine the infrared thermometer on the exhaust pipe near the suspect EGT sensor. The suspect gauge and the infrared thermometer should be about the same (at least in the same ballpark). As the exhaust pipe cools down, the infrared thermometer should continue tracking your suspect gauge reading. You can also check your CHT calibration the same way. One thing to note is that infrared thermometers are often calibrated on a flat black object and may read cooler on something shiny like an aluminum cylinder. Good luck, Dennis Legacy 600 hours