Return-Path: Received: from fed1rmmtao10.cox.net ([68.230.241.29] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 555101 for flyrotary@lancaironline.net; Fri, 03 Dec 2004 13:46:33 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.29; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao10.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041203184601.UKWX18977.fed1rmmtao10.cox.net@BigAl> for ; Fri, 3 Dec 2004 13:46:01 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: (unshrouded plug ?)required wrench Date: Fri, 3 Dec 2004 10:46:06 -0800 Message-ID: <000001c4d968$5915e5d0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4D925.4AF2A5D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4D925.4AF2A5D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Most cars have "magnetic suppression" type spark plug wire these days. It is a long coil of thin wire wrapped around insulating fibers. = It acts as an inductor in the circuit. This tends to make the current much = more constant during each spark.=20 =20 I went with MSD plug wires that are Magnetic Suppression type. My = thinking is the using induction vs reistance for current limiting is better = because the energy is "stored" rather than "dissipated" as it is in a = resistance. But I don't know if the "R" plug is really resistive, or also is = primarily using induction. I think I recall MSD says suppression plugs are not = needed with their wires. If the coils and ignition control module you have selected were designed to use magnetic suppression wires and resistor plugs, you would probably be smart in continuing to use these type plugs and wires. The higher peak current from non-resistor plugs can also damage the coil or = ICM if they are not designed for that use.=20 =20 Good point. I'm sure that the LS1 coils are designed to use some kind = of suppression. I know that the earlier electronic ignitions set up for = carbon core wires would not work well with regular wire. =20 Al >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0001_01C4D925.4AF2A5D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

&n= bsp; Most cars have "magnetic suppression" type spark plug wire these = days. It is a long coil of thin wire wrapped around insulating fibers. It acts as = an inductor in the circuit. This tends to make the current much more = constant during each spark.

I went with MSD plug wires that = are Magnetic Suppression type. My thinking is the using induction vs = reistance for current limiting is better because the energy is = “stored” rather than “dissipated” as it is in a resistance. But = I don’t know if the “R” plug is really resistive, or also is = primarily using induction. I think I recall MSD says suppression plugs are not = needed with their wires.

If the = coils and ignition control module you have selected were designed to use magnetic suppression wires and resistor plugs, you would probably be smart in = continuing to use these type plugs and wires. The higher peak current from = non-resistor plugs can also damage the coil or ICM if they are not designed for that = use.

Good point. I’m sure = that the LS1 coils are designed to use some kind of suppression. I know = that the earlier electronic ignitions set up for carbon core wires would not = work well with regular wire.

Al

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