X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [69.171.58.236] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 5.0.9) with HTTP id 1078448 for lml@lancaironline.net; Mon, 24 Apr 2006 00:37:48 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: CHT's To: lml X-Mailer: CommuniGate Pro WebUser v5.0.9 Date: Mon, 24 Apr 2006 00:37:48 -0400 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "George Braly" : Dom, If you read a bit further in Lycoming's materials, including the material referencing the 435dF upper limit, you will see that they also recommend normal operations at or below 400d F. There is a lot of accumulated recommendations by OEM's for temperatures in that range. There is a lot of good, well controlled, recent, experience that supports numbers in the 380dF range and not exceeding the 400dF range on a routine long term operating range. There is also a lot of good experience that operations down as low as in the 290 to 320dF range works well, also. In fact, there is VERY strong evidence that operation of TCM engines down as low as 240dF works very well with absolutely minimal blow-by due to piston/barrel dimensional fit issues. That comes from the fact that one TCM engine that uses the same barrels and pistons and rings and valves as the others, operates at 240dF, by design. Regards, George