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<DIV><SPAN class=694424422-06032006><FONT face=Arial color=#0000ff size=2>I'm
curious too Bill. Then same material should have the same heat
characteristics. Surface irregularities from casting should have more
effective surface area for greater heat loss.</FONT></SPAN></DIV>
<DIV><SPAN class=694424422-06032006><FONT face=Arial color=#0000ff size=2>Of
course my thermo and metallurgy courses were a long time
ago.</FONT></SPAN></DIV>
<DIV><SPAN class=694424422-06032006><FONT face=Arial color=#0000ff size=2>Dave
Burton</FONT></SPAN></DIV>
<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>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>Bill
Glaze<BR><B>Sent:</B> Monday, March 06, 2006 4:42 PM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] OS Shadel
piston/liner<BR><BR></FONT></DIV>
<DIV><FONT face=Arial>Ed:</FONT></DIV>
<DIV><FONT face=Arial>Just wondered why the machined head would show better
heat dissipation. We were always taught that an as-cast surface showed
better heat dissipation because of the greater developed surface area.
In fact, the "bad example" was the buffed and polished surface. It
showed terrible heat characteristics. (Unless, of course, you were
looking for heat retention.) The above assumes, of course, that the
materials involved were similar or exactly the same. Not quarreling,
just curious. </FONT></DIV>
<DIV><FONT face=Arial>Bill Glaze</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=edbon85@charter.net href="mailto:edbon85@charter.net">Ed Miller</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 4:14
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] OS
Shadel piston/liner</DIV>
<DIV><BR></DIV>
<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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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=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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