Return-Path: Received: from [65.33.166.167] (account ) by logan.com (CommuniGate Pro WebUser 4.0b8) with HTTP id 1770050 for ; Tue, 24 Sep 2002 03:41:46 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: TSIO 550 E1B backfires To: lml X-Mailer: CommuniGate Pro Web Mailer v.4.0b8 Date: Tue, 24 Sep 2002 03:41:46 -0400 Message-ID: In-Reply-To: <52548863F8A5D411B530005004759A931C2EA7@QBERT> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for George Braly : Chris, We see it start anywhere from 12,000' on up. Usually by 14 to 16,000 it starts or is detectable. It is worse when LOP because the lean mixtures force the spark plug electrodes to rise to a slightly higher voltage before the spark is struck across the gap. This means that the voltage in the entire magneto and harness rises somewhat before the spark ignites. Bendix mags seldom do this. Slicks often do. We change out a lot of Slick mags when we do the installations of the turbo normalized Bonanzas and Cessna 185s. Even on new airplanes with 200 hours TTAFE. Regards, George >>>there a particular altitude where this starts kicking in? What about at 18-20k with an O360. I have heard this before about Slick mags and have wondered how high I could go before running into trouble.<<<