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<DIV>I'm not sure how one plug going out would cause the engine to go
lean. At best having 2 plugs would cause the point of combustion to be a
bit earlier OR ( what I believe ) would cause a slightly more efficient burn of
the compressed air fuel mixture. Having 2 plugs also may ward off a sudden
engine failure due to a blown glow plug. The real advantage in my book of
the Mintor head is it is made from bar stock, not cast and therefore has a
better thermal efficiency, it sheds the head of combustion quicker and better
than the cast head. The lighter weight and second plug which may improve
mid range are just a bonus. If I look back at older OS and YS engines, the
more "high performance" versions of the same engine had machined bar stock
heads. For example the YS61AR and the YS 61R, the AR having besides other
improvements a machined bar stock head versus the 61R die cast head. </DIV>
<DIV>Ed M.</DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=pattern4u@comcast.net href="mailto:pattern4u@comcast.net">Grow
Pattern</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, March 06, 2006 10:42
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] OS Shadel
piston/liner</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Randy,</FONT></DIV>
<DIV><FONT face=Arial
size=2>
Said another way, if you lose a plug on a twin head, the engine goes lean and
usually get very hot :-( </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Learned that one the hard way. Using two plugs to
fix a rich spot transition on a pipe IMHO is at best a band-aid. Try it and
see for yourself :-)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Eric.</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean
Pappas</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=randy10926@comtekmail.com
href="mailto:randy10926@comtekmail.com">randy10926@comtekmail.com</A> ; <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, March 06, 2006 10:31
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] OS
Shadel piston/liner</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=078432915-06032006><FONT face=Arial color=#0000ff size=2>Hi
Randy,</FONT></SPAN></DIV>
<DIV><SPAN class=078432915-06032006><FONT face=Arial color=#0000ff
size=2>Mintor parts are available from Aeroslave. </FONT></SPAN></DIV>
<DIV><SPAN class=078432915-06032006><FONT face=Arial color=#0000ff size=2>I
find that the twin plug head is not absolutely necessary, but it widens the
nneedle valve sweet-spot: in the rich direction.</FONT></SPAN></DIV>
<DIV><SPAN class=078432915-06032006><FONT face=Arial color=#0000ff
size=2>Dean</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman"><A
href="mailto:d.pappas@kodeos.com">d.pappas@kodeos.com</A></FONT> </P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> <A
href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</A>
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>Glenn
Hatfield<BR><B>Sent:</B> Monday, March 06, 2006 9:23 AM<BR><B>To:</B>
nsrca-discussion@lists.nsrca.org<BR><B>Subject:</B> Re: [NSRCA-discussion]
OS Shadel piston/liner<BR><BR></FONT></DIV>
<DIV style="FONT-FAMILY: Arial,sans-serif">
<DIV>Where do you get the mintor head?</DIV>
<DIV> </DIV>
<DIV>Does the dual plug really help any?</DIV>
<DIV> </DIV>
<DIV>Randy</DIV>
<DIV><BR><BR>--- ronlock@comcast.net wrote:<BR><BR>From: "Ron Lockhart"
<ronlock@comcast.net><BR>To: "NSRCA Mailing List"
<nsrca-discussion@lists.nsrca.org><BR>Subject: Re:
[NSRCA-discussion] OS Shadel piston/liner<BR>Date: Fri, 3 Mar 2006
17:37:30 -0500<BR><BR></DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.pspec.com/">http://www.pspec.com/</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ron Lockhart</FONT></DIV>
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