X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.174.76.202] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 4.3.5) with HTTP id 1027057 for lml@lancaironline.net; Thu, 30 Jun 2005 10:25:48 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: Running TSIO-550 at High Power To: lml X-Mailer: CommuniGate Pro WebUser Interface v.4.3.5 Date: Thu, 30 Jun 2005 10:25:48 -0400 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "George Braly" : Colyn, For turbocharged engine there is essentially something close to zero advantage to using 10:1 pistons over 8.5 to 9 pistons and very many reasons not to do that. For a turbocharged engine - -one of the primary advantages of going from 7.5 to 8.5 CRs is to get the exhaust gas temperatures down by 100 degrees or so. With that accomplished, further CR increases become quickly counter-productive in the big scheme of things for turbo’d engines. Regards, George """ IF the timing is right, and the fuel flow is set up right, you can not only run a TSIO-550 for two hours at 2700x38, but you can do it with the same engine and 8.5:1 pistons George, long as you're feeling sporty, can't I put 10:1 pistons in if I have PRISM to back things off when I start detonating? """