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<DIV><SPAN class=788091900-07032006><FONT face=Arial color=#0000ff size=2>I
don't know why the density of a certain aluminum alloy (6061, etc) would be
different if die cast or extruded. It's the same
material.</FONT></SPAN></DIV>
<DIV><SPAN class=788091900-07032006><FONT face=Arial color=#0000ff size=2>But
then again, I'm old and so is my metallurgy knowledge</FONT></SPAN></DIV>
<DIV><SPAN class=788091900-07032006><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>Ed
Miller<BR><B>Sent:</B> Monday, March 06, 2006 7:14 PM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] OS Shadel
piston/liner<BR><BR></FONT></DIV>
<DIV>I could be wrong but it is my understanding the machined type heads are
made from bar stock, not die cast material. The greater density of the
bar stock material should transfer heat more efficiently than a die cast
piece. It is true in racing applications one used to polish the piston tops
and combustion chamber to aid in maintaining heat in the combustion chamber (
now there are coating for this ) as well as ward off carbon deposit build
up. I think the difference is the ability for a given material to absorb
and transfer heat versus the way a surface finish radiates heat. </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=burtona@bellsouth.net href="mailto:burtona@bellsouth.net">Dave
Burton</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 5:49
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] OS
Shadel piston/liner</DIV>
<DIV><BR></DIV>
<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> <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>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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