X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 10 Jul 2007 11:40:27 -0400 Message-ID: X-Original-Return-Path: Received: from ironport5.liveoakmail.com ([216.110.12.21] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2168514 for lml@lancaironline.net; Tue, 10 Jul 2007 04:03:32 -0400 Received-SPF: none receiver=logan.com; client-ip=216.110.12.21; envelope-from=walter@advancedpilot.com X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ao8CANbZkkZAMf4V/2dsb2JhbACCYg X-IronPort-AV: E=Sophos;i="4.16,521,1175490000"; d="scan'208,217";a="21206330" Received: from rs5.liveoakhosting.com (HELO secure5.liveoakhosting.com) ([64.49.254.21]) by ironport5.liveoakmail.com with ESMTP; 10 Jul 2007 03:02:51 -0500 Received: (qmail 7754 invoked from network); 10 Jul 2007 03:02:51 -0500 Received: from ip68-108-233-213.br.br.cox.net (HELO ?10.0.1.2?) (68.108.233.213) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 10 Jul 2007 03:02:51 -0500 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--411101341 X-Original-Message-Id: <07DA480A-4C6E-4408-9954-19DCB0913D1C@advancedpilot.com> From: Walter Atkinson Subject: Re: [LML] Re: TIT probes X-Original-Date: Tue, 10 Jul 2007 03:02:08 -0500 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-1--411101341 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed While that's true, the EGTs will also be higher from the lower compression ratios and the higher IATs. Walter On Jul 9, 2007, at 8:03 PM, marv@lancair.net wrote: There are second and third reasons why the TIT is typically higher than the open-pipe EGT. The lower compression ratio with the turbo engine means that the combustion gases have expanded (and cooled) less than in the normally-aspirated engine. Also, the turbo engine may have had a higher intake gas temperature (and pressure) before compression and combustion. --Apple-Mail-1--411101341 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=US-ASCII While that's true, the EGTs will = also be higher from the lower compression ratios and the higher = IATs.

Walter


On Jul 9, = 2007, at 8:03 PM, marv@lancair.net= wrote:

There are second and third reasons why the TIT is = typically
higher than the open-pipe EGT. The lower = compression ratio
with the turbo engine means that the = combustion gases have
expanded (and cooled) less than in the = normally-aspirated
engine. Also, the turbo engine may have = had a higher intake
gas temperature (and pressure) before = compression and combustion.

= --Apple-Mail-1--411101341--