X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 29 May 2007 15:46:08 -0400 Message-ID: X-Original-Return-Path: Received: from mx2.pshift.com ([216.57.116.7] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2073275 for lml@lancaironline.net; Tue, 29 May 2007 14:51:55 -0400 Received-SPF: none receiver=logan.com; client-ip=216.57.116.7; envelope-from=colyncase@earthlink.net Received: from ccaselt2 (unverified [216.57.118.92]) by mx2.pshift.com (Vircom SMTPRS 4.4.568.30) with SMTP id for ; Tue, 29 May 2007 14:51:15 -0400 Received-SPF: none (mx2.pshift.com: domain of colyncase@earthlink.net does not designate any permitted senders) X-Modus-BlackList: 216.57.118.92=OK;colyncase@earthlink.net=OK X-Modus-RBL: 216.57.118.92=Excluded X-Modus-Trusted: 216.57.118.92=NO X-Modus-Audit: FALSE;0;0;0 X-Original-Message-ID: <031a01c7a222$5a2c9f10$0502a8c0@nvidia.com> From: "Colyn Case on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: TSIO 550 LOP X-Original-Date: Tue, 29 May 2007 11:51:22 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0317_01C7A1E7.AD83ECD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0317_01C7A1E7.AD83ECD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Walter said, RPM: Higher RPM move the EFFECTIVE timing closer to TDC. This results in = more expansion =3D lower EGT. Walter, I understand why higher rpm moves the effective timing LATER but I don't understand why that results in "more expansion" ...also & btw I didn't understand why 7.5:1 timing being two degrees = earlier improves the relative bsfc to the 8.5:1 Colyn ------=_NextPart_000_0317_01C7A1E7.AD83ECD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Walter said,
RPM:
Higher RPM move the EFFECTIVE timing closer to TDC.  This = results=20 in more expansion =3D lower EGT.

 
Walter,  I understand why higher = rpm moves the=20 effective timing LATER
but I don't understand why that results = in "more=20 expansion"
 
...also & btw I didn't understand = why 7.5:1=20 timing being two degrees earlier improves the relative bsfc to the=20 8.5:1
 
 
Colyn
 
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