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<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=342440607-20102015>It will be no problem to open up the combustion chamber
of a Mk II GT6 cyl head. Jim Gray is right that measuring the volume
of the chambers is all important. You need to measure, with a seringue, the
volume of all the chambers, because the volumes can differ a lot, and
determine at what volume you want to arrive to get the compression
ratio you want. If the deck height is zero, a 1mm gasket is ok
to get a strong squish. A 1mm gasket is 4.2cc when the bore is
the standard 74.7mm. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=342440607-20102015>Marcel</SPAN></FONT></DIV><BR>
<DIV lang=nl class=OutlookMessageHeader dir=ltr align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>Van:</B> Fot [mailto:fot-bounces@autox.team.net]
<B>Namens </B>riverside@southslope.net<BR><B>Verzonden:</B> maandag 19 oktober
2015 20:31<BR><B>Aan:</B> Jim Gray; 'Spitfire Racing';
'Fot'<BR><B>Onderwerp:</B> Re: [Fot] Head question on TR-6<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>cc the head so you know where you are.</DIV>
<DIV> </DIV>
<DIV>an extra head gasket MAY have a negative impact </DIV>
<DIV>in your quench distance.</DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
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<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=toodamnfunky@comcast.net
href="mailto:toodamnfunky@comcast.net">Jim Gray</A> </DIV>
<DIV><B>Sent:</B> Sunday, October 18, 2015 2:37 PM</DIV>
<DIV><B>To:</B> <A title=Spitfire_Racing@twcny.rr.com
href="mailto:Spitfire_Racing@twcny.rr.com">'Spitfire Racing'</A> ; <A
title=fot@autox.team.net href="mailto:fot@autox.team.net">'Fot'</A> </DIV>
<DIV><B>Subject:</B> Re: [Fot] Head question on TR-6</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV class=Section1>
<P class=MsoNormal><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial; COLOR: navy">Russ,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial; COLOR: navy">Yes you can adjust the
volume that way but you can always go to a thicker head gasket to get you there.
You also have to know the deck height of the block<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial; COLOR: navy">it’s going
on.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial; COLOR: navy">jim
g<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial; COLOR: navy"><o:p></o:p></SPAN></FONT> </P>
<DIV>
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face="Times New Roman"><SPAN
style='FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"'>
<HR tabIndex=-1 align=center SIZE=2 width="100%">
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: tahoma; FONT-WEIGHT: bold">From:</SPAN></FONT></B><FONT
size=2 face=Tahoma><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: tahoma"> Fot
[mailto:fot-bounces@autox.team.net] <B><SPAN style="FONT-WEIGHT: bold">On Behalf
Of </SPAN></B>Spitfire Racing<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Sunday, October 18, 2015 7:33
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> 'Fot'<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Fot] Head question on
TR-6</SPAN></FONT><FONT size=3 face="Times New Roman"><SPAN
style='FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"'><o:p></o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT size=2 face=Calibri><SPAN
style="FONT-SIZE: 11pt"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN style="FONT-SIZE: 14pt">For
the past 20 years or so I have had a NOS Circle B 6 cylinder head on a shelf in
the parts room. For some reason I assumed it was for a TR-6 and would be ideal
as a starting point for an eventual TR-250 project. Must to my disappointment I
find it is a Mk2 GT-6 head. Likely it would afford too high a CR sitting on a
2500cc engine in stock condition. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN style="FONT-SIZE: 14pt">The
question is……… Is it unreasonable to think I can open up the combustion chamber
to bring the CR down to ~ 10.5:1 using it on a 2500cc application
?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN style="FONT-SIZE: 14pt">Any
of you have the combustion chamber volume to achieve this using flat top pistons
??<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt">Anyone out there have done this before? No point in
trying to reinvent the wheel. Serial number on head is
517528.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN style="FONT-SIZE: 14pt">Snow
on the ground this AM and temps in the 20s has me already in the winter project
mode!<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt">Thanks,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN style="FONT-SIZE: 14pt">Russ
Moore<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt">Spitfire #49<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></FONT> </P></DIV>
<P>
<HR>
_______________________________________________<BR>fot@autox.team.net<BR><BR>http://www.fot-racing.com<BR><BR>Donate:
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