X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 14 Mar 2006 23:31:42 -0500 Message-ID: X-Original-Return-Path: Received: from mail.pshift.com ([63.166.217.30] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1033654 for lml@lancaironline.net; Tue, 14 Mar 2006 10:01:50 -0500 Received-SPF: none receiver=logan.com; client-ip=63.166.217.30; envelope-from=colyncase@earthlink.net Received: from ccaselt (unverified [216.57.118.156]) by mail.pshift.com (Vircom SMTPRS 4.3.459.0) with SMTP id for ; Tue, 14 Mar 2006 10:00:43 -0500 X-Modus-BlackList: 216.57.118.156=OK;colyncase@earthlink.net=OK X-Modus-RBL: 216.57.118.156=OK X-Modus-Trusted: 216.57.118.156=NO X-Original-Message-ID: <075301c64778$1053c1d0$c1321f0a@nvidia.com> From: "colyncase on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: TSIO-550-N HP? X-Original-Date: Tue, 14 Mar 2006 07:00:41 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0750_01C64735.01AD2100" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0750_01C64735.01AD2100 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jonathan said, =20 Colyn, =20 The higher compression ratio engine would actually be expected to have higher CHTs, but lower EGTs and TITs. The reason for the difference = is just as you say however. The greater expansion factor takes waste heat out = of the exhaust and converts it to work, so CHT is higher, EGT lower and = brake specific fuel consumption is lower. The way to mitigate the higher = CHTs is to run the engine LOP, and LOP operation will also yield the lowest = bsfc. =20 I believe the -N model number refers to the Continental engines with = tuned induction. =20 Jonathan Actually, it is somewhat counterintuitive but CHT's come out lower too. ------=_NextPart_000_0750_01C64735.01AD2100 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Jonathan said,
  
  = Colyn,
 =20
  The higher compression ratio engine would actually be = expected to=20 have
  higher CHTs, but lower EGTs and TITs.  The reason = for the=20 difference is just
  as you say however.  The greater = expansion=20 factor takes waste heat out of
  the exhaust and converts it to = work, so=20 CHT is higher, EGT lower and brake
  specific fuel consumption = is=20 lower.  The way to mitigate the higher CHTs is
  to run the = engine=20 LOP, and LOP operation will also yield the lowest bsfc.
  =
  I=20 believe the -N model number refers to the Continental engines with=20 tuned
  induction.
 
  = Jonathan
 
Actually,  it is somewhat = counterintuitive but=20 CHT's come out lower too.

 
------=_NextPart_000_0750_01C64735.01AD2100--