X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3749127 for flyrotary@lancaironline.net; Wed, 08 Jul 2009 09:29:38 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=echristley@nc.rr.com Received: from [192.168.0.19] (really [66.57.38.121]) by cdptpa-omta04.mail.rr.com with ESMTP id <20090708132900556.MFTT2041@cdptpa-omta04.mail.rr.com> for ; Wed, 8 Jul 2009 13:29:00 +0000 Message-ID: <4A549F51.3050804@nc.rr.com> Date: Wed, 08 Jul 2009 09:29:53 -0400 From: Ernest Christley User-Agent: Thunderbird 2.0.0.22 (X11/20090608) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] SAG- Spark plugs References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lynn Hanover wrote: > Poor folks race with Autolight AR2692 end style and small porcelain just > like the N-57G. Full size center wire, conventional strap, but 100% of the > center wire is exposed in an end view. Actually used by NASCAR and the local > circle track people, and stocked by Autozone and others. About $5.00 a box > of 4. They work fine. I raced them one weekend, no problems, but we were > getting the NGK plugs for free so I stuck with them. > > Ed, have you given the Autolight AR2692 a chance to see how long it takes for SAG to set in. Your theory is that lead deposits settle on the porcelain and start to provide an alternate path. The Autolight's configuration looks like it has a wider space between electrode and ground, except for the tang (not sure what the real name is). If your theory is correct, you should be able to get a lot more time on the Autolights. -- http://www.ernest.isa-geek.org