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<DIV>I believe it had more to do with interference with water pumps when shaving
a head.</DIV>
<DIV>JVV</DIV>
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<DIV style="font-color: black"><B>From:</B> <A
title=auprichard@uprichard.net>Andrew Uprichard</A> </DIV>
<DIV><B>Sent:</B> Monday, November 26, 2018 2:14 PM</DIV>
<DIV><B>To:</B> <A title=triumphs@autox.team.net>triumphs@autox.team.net</A>
</DIV>
<DIV><B>Subject:</B> [TR] TR cylinder heads</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<P class=MsoNormal><SPAN style='FONT-FAMILY: "Times New Roman","serif"'>When it
comes to the 4-cylinder TR models, I am aware of four variations on cylinder
head design: the original low-port TR2 head, the “le Mans” head which was
a variation on the low port design, the high port head which came with most of
the TR3s and the TR4 head with the smaller intake
aperture.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Times New Roman","serif"'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN style='FONT-FAMILY: "Times New Roman","serif"'>But
someone was talking to me the other day about a variation in the high port TR3
head. According to this guy, there was a variation in the thermostat
housing, some of which were more sloping than rounded. He claimed the
sloped design was more attractive as it lended itself to more shaving and thus a
better, high compression engine.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Times New Roman","serif"'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN style='FONT-FAMILY: "Times New Roman","serif"'>I must
admit I had never heard about this. I have three heads sitting in my barns
and all have what appears to be the same, rounded underneath to the thermostat
housing.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-FAMILY: "Times New Roman","serif"'><o:p></o:p></SPAN> </P>
<P class=MsoNormal><SPAN style='FONT-FAMILY: "Times New Roman","serif"'>Has
anyone heard of this?<BR><BR>Andrew Uprichard<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style='FONT-FAMILY: "Times New Roman","serif"'>Jackson,
Michigan<o:p></o:p></SPAN></P></DIV>
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