X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-d02.mx.aol.com ([205.188.157.40] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3748013 for flyrotary@lancaironline.net; Tue, 07 Jul 2009 12:40:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.40; envelope-from=WRJJRS@aol.com Received: from imo-ma02.mx.aol.com (imo-ma02.mx.aol.com [64.12.78.137]) by imr-d02.mx.aol.com (v107.10) with ESMTP id RELAYIN1-24a537a0cad; Tue, 07 Jul 2009 12:38:36 -0400 Received: from WRJJRS@aol.com by imo-ma02.mx.aol.com (mail_out_v40_r1.5.) id q.d13.29fa01b1 (37540) for ; Tue, 7 Jul 2009 12:38:29 -0400 (EDT) Received: from smtprly-db03.mx.aol.com (smtprly-db03.mx.aol.com [205.188.249.154]) by cia-mb02.mx.aol.com (v124.15) with ESMTP id MAILCIAMB021-5c3e4a5379fbf8; Tue, 07 Jul 2009 12:38:28 -0400 Received: from mblk-d30 (mblk-d30.mblk.aol.com [205.188.149.22]) by smtprly-db03.mx.aol.com (v124.15) with ESMTP id MAILSMTPRLYDB034-5c3e4a5379fbf8; Tue, 07 Jul 2009 12:38:19 -0400 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: SAG - NKG Date: Tue, 07 Jul 2009 12:38:18 -0400 X-AOL-IP: 64.12.78.137 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CBCD3877CEAEA1_6AC_146E_mblk-d30.sysops.aol.com" X-Mailer: AOL Webmail 43735-STANDARD Received: from 66.253.96.220 by mblk-d30.sysops.aol.com (205.188.149.22) with HTTP (WebMailUI); Tue, 07 Jul 2009 12:38:18 -0400 Message-Id: <8CBCD3877C52545-6AC-9ED@mblk-d30.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CBCD3877CEAEA1_6AC_146E_mblk-d30.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" Mark, One thing to watch out for on the fine-wire plugs, is NOT to run dual lead coils. Some of the systems for the 20B fire both plugs at the same time. This isn't a problem, but some of the engine management systems use 3 coils with dual high-tension leads to make things simpler. Since most of the dual-lead coils use a floating secondary one plug fires normally and the other fires BACKWARD sidewire to center electrode. The plug that fires backward will wear the center electrode out faster. That isn't a problem with standard plugs, but on the high end platinum or iridium plugs the center electrode will erode or mushroom on the end. We saw this?all the time on 4 cylinder motorcycle engines where they always used?2 dual lead coils to make the system cost less. The newer high performance bikes have gone to coil on plug designs, and switch the low tension side to eleiminate the problem. Bill Jepson? -----Original Message----- From: Mark Steitle To: Rotary motors in aircraft Sent: Tue, Jul 7, 2009 7:25 am Subject: [FlyRotary] Re: SAG - NKG John, ? I've been running Renesis (irridium) plugs in my 20B with good results.? Of course, they're about 5 times the price of the standard plugs.? But if they last 5 times longer, I feel that?they are?worth the price. ? Mark S.? On Tue, Jul 7, 2009 at 9:05 AM, John wrote: Ed, it appears to me that the NKG report is suggesting that we use hotter spark plugs, has anyone tried this.? JohnD ----------MB_8CBCD3877CEAEA1_6AC_146E_mblk-d30.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" Mark,
One thing to watch out for on the fine-wire plugs, is NOT to run dual lead coils. Some of the systems for the 20B fire both plugs at the same time. This isn't a problem, but some of the engine management systems use 3 coils with dual high-tension leads to make things simpler. Since most of the dual-lead coils use a floating secondary one plug fires normally and the other fires BACKWARD sidewire to center electrode. The plug that fires backward will wear the center electrode out faster. That isn't a problem with standard plugs, but on the high end platinum or iridium plugs the center electrode will erode or mushroom on the end. We saw this all the time on 4 cylinder motorcycle engines where they always used 2 dual lead coils to make the system cost less. The newer high performance bikes have gone to coil on plug designs, and switch the low tension side to eleiminate the problem.
Bill Jepson 


-----Original Message-----
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, Jul 7, 2009 7:25 am
Subject: [FlyRotary] Re: SAG - NKG

John,
 
I've been running Renesis (irridium) plugs in my 20B with good results.  Of course, they're about 5 times the price of the standard plugs.  But if they last 5 times longer, I feel that they are worth the price.
 
Mark S. 

On Tue, Jul 7, 2009 at 9:05 AM, John <downing.j@sbcglobal.net> wrote:
Ed, it appears to me that the NKG report is suggesting that we use hotter spark plugs, has anyone tried this.  JohnD

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