X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 18 Oct 2010 22:15:08 -0400 Message-ID: X-Original-Return-Path: Received: from a2s34.a2hosting.com ([216.119.134.2] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTPS id 4508878 for lml@lancaironline.net; Sat, 16 Oct 2010 22:56:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.119.134.2; envelope-from=lorn@dynacomm.us DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=dynacomm.us; h=Received:From:Content-Type:Content-Transfer-Encoding:Subject:Date:Message-Id:Cc:To:Mime-Version:X-Mailer:X-Source:X-Source-Args:X-Source-Dir; b=QoC3cjxt1U3WdfMzxjpaIun+OSZszNZLJ6LYfMXrI7H4aqMBRaZrIeAKoITTR7SSivfzaCrLkKAuMyf4Mv2wOnSmHxVMsy4aLPI2gRmgLXuAcErZH0MVcpE+kSYFgx/H; Received: from c-68-61-17-78.hsd1.mi.comcast.net ([68.61.17.78] helo=[192.168.1.9]) by a2s34.a2hosting.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.69) (envelope-from ) id 1P7JPG-00026z-1H; Sat, 16 Oct 2010 22:55:30 -0400 From: Lorn H Olsen Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: Re: Fine Wire Plug Resistance X-Original-Date: Sat, 16 Oct 2010 22:55:27 -0400 X-Original-Message-Id: X-Original-Cc: ijheizer@comcast.net, Wolfgang Franke X-Original-To: Lancair List Mime-Version: 1.0 (Apple Message framework v1082) X-Mailer: Apple Mail (2.1082) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - a2s34.a2hosting.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - dynacomm.us X-Source: X-Source-Args: X-Source-Dir: I thought that I would measure the ohms on my Iridium plugs today. 7 of = the plugs are Champion and the other is Autolight. 1 top 6.6 mega ohm 1 bottom 2.8 mega ohm 2 top 1.5 kilo ohm 2 bottom 7.7 mega ohm 3 top 4.5 mega ohm 3 bottom 2.4 mega ohm 4 top 24.5 kilo ohm 4 bottom 1.2 mega ohm Autolight plug No, the above readings are not typos or misreads. Just the facts. = Something must be wrong with the 800 - 1,200 ohms listed below. Tomorrow = I will remeasure with an analog VOM meter. The plugs all looked pretty good except for the number 2 bottom. It = looked very fouled and was not firing quite right from an in flight = test. I think that I may swap the number 2 bottom's resister with one from an = old standard plug. Thoughts are welcomed. > From: Isaac Heizer > Date: October 10, 2010 10:57:35 AM EDT >=20 > . > . > . > Then we started talking about spark plugs: I mentioned my plane has = Champion fine wire plugs. He said all plugs have an internal resistor, = and for some reason the resistance of many Champion plugs seems to = increase as the plug ages. Once the plug has been cleaned, the = resistance can be measured with a standard ohm meter between the center = electrode and the connection inside the plug barrel -- all new plugs = should have a resistance somewhere around 800 - 1200 ohms. If the = resistance ever measures above 5000 ohms, the plug should not be used.. > . > . > . >=20 > -isaac > ES-P N7842K >=20 -- Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us LNC2, FB90/92, O-320-D1F, 1,750 hrs, N31161, Y47, SE Michigan