Return-Path: Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 816509 for flyrotary@lancaironline.net; Tue, 22 Mar 2005 20:48:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=ceengland@bellsouth.net Received: from [209.214.146.63] by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050323014722.PNCT2001.imf17aec.mail.bellsouth.net@[209.214.146.63]> for ; Tue, 22 Mar 2005 20:47:22 -0500 Message-ID: <4240CAAC.2000004@bellsouth.net> Date: Tue, 22 Mar 2005 19:47:24 -0600 From: Charlie England User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Exhaust pipe size for Renesis... for Tracy References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit How much effect does the siamesed port have on exhaust tuning? Since a significant % of the exhaust is getting mixed at the port, it would seem to kill the tuning. Charlie Tracy Crook wrote: > "Outside" two ports used 1.75" OD 321 SS pipes. Center "siamesed" > port has 1.5" OD pipe. All ports on Renesis are rectangular so pipe > was formed to fit the rectangular holes in the home made flanges. > > Tracy (still waiting for food flying weather) > > Tracy, > > What size pipe did you use for the Renesis exhaust ports? Also, > was is round, oval or rectangular.? > > > Thanks, > > Bobby Hughes >