X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1654859 for flyrotary@lancaironline.net; Fri, 08 Dec 2006 11:29:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=Lehanover@aol.com Received: from Lehanover@aol.com by imo-m28.mx.aol.com (mail_out_v38_r7.6.) id q.cc3.5b6e405 (58677) for ; Fri, 8 Dec 2006 11:29:10 -0500 (EST) From: Lehanover@aol.com Message-ID: Date: Fri, 8 Dec 2006 11:29:07 EST Subject: Re: [FlyRotary] Re: MSD coils - Plug Fouling... again. To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1165595347" X-Mailer: 9.0 Security Edition for Windows sub 5331 X-Spam-Flag: NO -------------------------------1165595347 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/8/2006 10:14:08 A.M. Eastern Standard Time, rlwhite@comcast.net writes: Hi Lynn, Do you know if the MSD replacements for the LS1 coils are as hot as the real MSD systems? I've got a set of LS6 coils that the ad on ebay said had a higher spark voltage than MSD, but haven't tried them yet. Bob W. The list of coils that work with the MSD is in the box with the system. Also, the list used to be on the MSD web site. The difference is that the primary voltage is 350 volts instead of 12 volts. Coils with internal resisters may overheat and open the resister. High turns ratio coils designed for 12 volt systems may perform poorly at 350 volts. Coils listed by MSD work just fine. I don't know if using the listed (as safe) coils will perform well at only 12 volts. Energy out = energy in, minus efficiency losses (heat). No matter what the add says. That is energy, not voltage. Plan for one amp per thousand RPM If you find yourself with available energy at the coil primary will be reduced. So, the secondary voltage will be reduced. The MSD and most others will work down to about 8 volts. Clean plugs will continue to fire at reduced voltage. Carbon covered plugs may provide a sufficient alternate path to short the plug. Continued operation into this unhappy situation may be improved by gapping the plugs a bit closer than is common. The .010" I use would be a bit much, but you get the idea. Should this develop the engine will begin to misfire. Reducing throttle slightly will bring it back for a while, by reducing the effective compression ratio. (because cylinder filling goes down). Repeat until below 8 volts, and then glide as required. Lynn E. Hanover -------------------------------1165595347 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 12/8/2006 10:14:08 A.M. Eastern Standard Time,=20 rlwhite@comcast.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Hi=20 Lynn,

Do you know if the MSD replacements for the LS1 coils are as=20= hot=20 as the
real MSD systems?  I've got a set of LS6 coils that the ad=20= on=20 ebay said
had a higher spark voltage than MSD, but haven't tried them=20 yet.

Bob W.
The list of coils that work with the MSD is in the box with the system.= =20 Also, the list used to be on the MSD web site. The difference is that the=20 primary voltage is 350 volts instead of 12 volts. Coils with internal resist= ers=20 may overheat and open the resister. High turns ratio coils designed for 12 v= olt=20 systems may perform poorly at 350 volts. Coils listed by MSD work just fine.= I=20 don't know if using the listed (as safe) coils will perform well at only 12=20 volts. 
 
Energy out =3D energy in, minus efficiency losses (heat). No matter wha= t the=20 add says.
That is energy, not voltage. Plan for one amp per thousand RPM
 
If you find yourself with available energy at the coil primary will be=20 reduced. So, the secondary voltage will be reduced. The MSD and most others=20= will=20 work down to about 8 volts.
 
Clean plugs will continue to fire at reduced voltage. Carbon covered pl= ugs=20 may provide a sufficient alternate path to short the plug. Continued operati= on=20 into this unhappy situation may be improved by gapping the plugs a bit close= r=20 than is common. The .010" I use would be a bit much, but you get the idea.
 
Should this develop the engine will begin to misfire. Reducing throttle= =20 slightly will bring it back for a while, by reducing the effective compressi= on=20 ratio. (because cylinder filling goes down).
Repeat until below 8 volts, and then glide as required.
 
Lynn E. Hanover
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