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I believe it had more to do with interference with water pumps when =
shaving a head.
JVV
From: Andrew Uprichard=20
Sent: Monday, November 26, 2018 2:14 PM
To: triumphs@autox.team.net=20
Subject: [TR] TR cylinder heads
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 =
=E2=80=9Cle Mans=E2=80=9D 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.
=20
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.
=20
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.
=20
Has anyone heard of this?
Andrew Uprichard
Jackson, Michigan
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<DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>I believe it had more to do with interference with water pumps when =
shaving=20
a head.</DIV>
<DIV>JVV</DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
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<DIV> </DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A=20
title=3Dauprichard@uprichard.net>Andrew Uprichard</A> </DIV>
<DIV><B>Sent:</B> Monday, November 26, 2018 2:14 PM</DIV>
<DIV><B>To:</B> <A =
title=3Dtriumphs@autox.team.net>triumphs@autox.team.net</A>=20
</DIV>
<DIV><B>Subject:</B> [TR] TR cylinder heads</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV class=3DWordSection1>
<P class=3DMsoNormal><SPAN style=3D'FONT-FAMILY: "Times New =
Roman","serif"'>When it=20
comes to the 4-cylinder TR models, I am aware of four variations on =
cylinder=20
head design: the original low-port TR2 head, the =E2=80=9Cle =
Mans=E2=80=9D head which was=20
a variation on the low port design, the high port head which came with =
most of=20
the TR3s and the TR4 head with the smaller intake=20
aperture.<o:p></o:p></SPAN></P>
<P class=3DMsoNormal><SPAN=20
style=3D'FONT-FAMILY: "Times New =
Roman","serif"'><o:p></o:p></SPAN> </P>
<P class=3DMsoNormal><SPAN style=3D'FONT-FAMILY: "Times New =
Roman","serif"'>But=20
someone was talking to me the other day about a variation in the high =
port TR3=20
head. According to this guy, there was a variation in the =
thermostat=20
housing, some of which were more sloping than rounded. He claimed =
the=20
sloped design was more attractive as it lended itself to more shaving =
and thus a=20
better, high compression engine.<o:p></o:p></SPAN></P>
<P class=3DMsoNormal><SPAN=20
style=3D'FONT-FAMILY: "Times New =
Roman","serif"'><o:p></o:p></SPAN> </P>
<P class=3DMsoNormal><SPAN style=3D'FONT-FAMILY: "Times New =
Roman","serif"'>I must=20
admit I had never heard about this. I have three heads sitting in =
my barns=20
and all have what appears to be the same, rounded underneath to the =
thermostat=20
housing.<o:p></o:p></SPAN></P>
<P class=3DMsoNormal><SPAN=20
style=3D'FONT-FAMILY: "Times New =
Roman","serif"'><o:p></o:p></SPAN> </P>
<P class=3DMsoNormal><SPAN style=3D'FONT-FAMILY: "Times New =
Roman","serif"'>Has=20
anyone heard of this?<BR><BR>Andrew Uprichard<o:p></o:p></SPAN></P>
<P class=3DMsoNormal><SPAN style=3D'FONT-FAMILY: "Times New =
Roman","serif"'>Jackson,=20
Michigan<o:p></o:p></SPAN></P></DIV>
<P>
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