Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Fri, 23 May 2003 17:44:34 -0400 Message-ID: X-Original-Return-Path: Received: from [65.54.169.64] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2360601 for flyrotary@lancaironline.net; Fri, 23 May 2003 10:57:28 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 23 May 2003 07:57:27 -0700 Received: from 67.243.12.217 by bay3-dav34.bay3.hotmail.com with DAV; Fri, 23 May 2003 14:57:27 +0000 X-Originating-IP: [67.243.12.217] X-Originating-Email: [lors01@msn.com] Reply-To: "Tracy Crook" From: "Tracy Crook" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: FS: New Turrentine built 13b FS- great deal! X-Original-Date: Fri, 23 May 2003 10:58:14 -0400 Organization: Real World Solutions Inc. MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Original-Message-ID: X-OriginalArrivalTime: 23 May 2003 14:57:27.0572 (UTC) FILETIME=[A07B2D40:01C3213B] Tracy, is your engine street ported? That's an option, and I can't recall if you had it done. Rusty My engine (2nd gen 4 port with 9.7 CR rotors) was given a port cleanup but almost no porting. Top of port raised less than .1" which is less than a typical "street port". FWIW, I think the estimates of huge power gains with porting are way overblown at the RPM we operate at. Note that the RX-8 engine does not open the secondary port barrel valves until the engine reaches 6250 rpm. Next time I build a 6 port engine (which will be for my ailing RX-7) I will be doing some experimenting based on this observation. Tracy Crook