Return-Path: Received: from [65.33.160.45] (account ) by logan.com (CommuniGate Pro WebUser 4.1b6) with HTTP id 2365774 for lml@lancaironline.net; Wed, 28 May 2003 06:24:51 -0400 From: "Marvin Kaye" Subject: Re: [LML] IV-P engine management To: lml X-Mailer: CommuniGate Pro WebUser Interface v.4.1b6 Date: Wed, 28 May 2003 06:24:51 -0400 Message-ID: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for Hal Woodruff : Its really hard to tell what power you're developing by only stating 21 gal/hr without mentioning the man. pressure and the RPMs. But its sounds like you're running rich of peak but not by much and certainly not rich enough. This could be a dangerous place to run your engine and 1625°F sounds like its way too hot!!! If you're wanting to lean then try 29" MP, 2400 RPM and lean to about 1500° on the hottest cylinder. This will be about 65% power and a reasonable temp for the EGT and will keep your engine temps at reasonable levels. It may take an extra minute in your short trip but in the long run will help you get there every time. These are good numbers for the long trips too. Keep it cool and it'll run for a long time. Running at high temps is a prescription for detonation and/or pre-ignition. Don't go there. You might consider contacting the GAMI people (www.gami.com) and check out some of their literature. Also, John Deakin has a series in AVWEB entitled "Those Fire Breathing Turbos" that you should read. Great stuff on engine management. And then ultimately, spend 2.5 days with the folks at www.advancedpilot.com and learn all about your engine - unlearn stuff that you've learned previously that's dangerous to your health. If this sounds like a commercial then so be it. I just got back from the seminar and I learned things about engine management, things that I had been taught years ago, that turn out to be old wives tales, anecdotal, and down-right dangerous. > Between long flights I am doing a lot of short ones between San Juan > Puerto Rico and the west coast of the island. Only 60 miles. I fly the > distance between 2,000 and 3,000. The flight is only 17 minutes long in > my IVP. > What is the best engine management procedure for this kind of flying. > Should I run mixture rich all the time? Should I lean? > I have been flying the short leg pulling mixture back to 21 gallons ph > showing 1625 EGT.