X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 04 Jan 2008 08:32:44 -0500 Message-ID: X-Original-Return-Path: Received: from [68.98.211.24] (HELO systems3.net) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2629810 for lml@lancaironline.net; Thu, 03 Jan 2008 16:25:08 -0500 Received-SPF: none receiver=logan.com; client-ip=68.98.211.24; envelope-from=cberland@systems3.net Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C84E4F.0669EA0F" Subject: [LML] One mag, One electronic ignition X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Date: Thu, 3 Jan 2008 14:24:29 -0700 X-Original-Message-ID: <87C33F695961494D886EB3B6C8A476514756F4@s3server.Systems3.local> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] One mag, One electronic ignition Thread-Index: AchONPxss+qj1JetTdK/g2nhedU6vwAFy7FQ From: "Craig Berland" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C84E4F.0669EA0F Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 I have not done any tests but I believe if One Mag and One Electronic Ignition is used you are likely to fail the Mag Coil prematurely (that would reduce the aprox. 400 to 600 hour normal failure of a new Slick to a really unacceptable life). Why?? One of the principal advantages of EI is the variable timing advance that improves power and efficiency. When the EI fires a plug before the Mag, the pressure rise from earlier combustion may prevent the Mag plug from firing. Maybe (probably?) preventing the Mag plug from firing at least at higher altitudes where advance is the greatest. I base my theory on the old Champion Spark Plug Testers that used an air hose to increase pressure while firing a plug to check its ability to continue to fire. What do others say? Steve Colwell Steve, I don't think the pressure rise should cause a mag problem. Remember both fire before TDC. Actually I once wondered if the staggered fire of dual ignition would improve burn quality. However, General Motors shut down an engine program before I could obtain 1st hand data. I have a patent for a dual ignition engine design but the engine never ran. I would like to see some dyno data.....interesting subject. Craig Berland ------_=_NextPart_001_01C84E4F.0669EA0F Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable [LML] One mag, One electronic ignition

 
I have not done = any tests but I believe if One Mag and One Electronic Ignition is used = you are likely to fail the Mag Coil prematurely (that would reduce the = aprox. 400 to 600 hour normal failure of a new Slick to a really = unacceptable life).  Why??  One of the principal advantages of = EI is the variable timing advance that improves power and = efficiency.  When the EI fires a plug before the Mag, the pressure = rise from earlier combustion may prevent the Mag plug from firing.  = Maybe (probably?) preventing the Mag plug from firing at least at higher = altitudes where advance is the greatest. I base my theory on the old = Champion Spark Plug Testers that used an air hose to increase pressure = while firing a plug to check its ability to continue to fire.  What = do others say?  Steve Colwell


Steve, I don't think the pressure rise should cause a mag = problem.  Remember both fire before TDC.  Actually I once = wondered if the staggered fire of dual ignition would improve burn = quality.  However, General Motors shut down an engine program = before I could obtain 1st hand data.  I have a patent for a dual = ignition engine design but the engine never ran.  I would like to = see some dyno data.....interesting subject.

Craig Berland

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