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Does anyone have anything to add about the information I provided about a wh=
at looks like a 5th casting for 4 cylinder TRs? I hope the message came thr=
ough with the attached photos.
Dave H.
Sent from my iPad
> On Nov 26, 2018, at 4:25 PM, Dave <dlhogye@comcast.net> wrote:
>=20
> The differences in the TR2-4 cylinder heads are well documented, including=
TeriAnn's. Yes, there are at least two and possibly TR3 high port castings=
. Early ones have the rounded thermostat casting and later ones have the an=
gled one. However, I have two heads that I have not found information. The=
se heads are like the TR4A head casting in that they have the flat between t=
he front stud holes, but are other wise similar to the later TR3 casting. T=
hey are stamped 510084 on the flat. TR4As are stamped 511695. They might b=
e TR4. They have the two different valve stem sized guides, the step down i=
n diameter of the intake port, like high port TR3s and they have the angled t=
-stat casting. =20
> Can anyone share some info on these. =20
> Dave H.
> <image1.JPG><image2.JPG>
>=20
> Sent from my iPad
>=20
>> On Nov 26, 2018, at 11:14 AM, Andrew Uprichard <auprichard@uprichard.net>=
wrote:
>>=20
>> When it comes to the 4-cylinder TR models, I am aware of four variations o=
n cylinder head design: the original low-port TR2 head, the =E2=80=9Cle Man=
s=E2=80=9D head which was a variation on the low port design, the high port h=
ead which came with most of the TR3s and the TR4 head with the smaller intak=
e 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 thermos=
tat housing, some of which were more sloping than rounded. He claimed the s=
loped design was more attractive as it lended itself to more shaving and thu=
s 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 th=
e thermostat housing.
>> =20
>> Has anyone heard of this?
>>=20
>> Andrew Uprichard
>> Jackson, Michigan
>> ** triumphs@autox.team.net **
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/arch=
ive
>>=20
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dlhogy=
e@comcast.net
> ** triumphs@autox.team.net **
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archi=
ve
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dlhogye=
@comcast.net
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Does anyone have anything to add about=
the information I provided about a what looks like a 5th casting for 4 cyli=
nder TRs? I hope the message came through with the attached photos.</d=
iv><div id=3D"AppleMailSignature">Dave H.<br><br>Sent from my iPad</div><div=
><br>On Nov 26, 2018, at 4:25 PM, Dave <<a href=3D"mailto:dlhogye@comcast=
.net">dlhogye@comcast.net</a>> wrote:<br><br></div><blockquote type=3D"ci=
te"><div><meta http-equiv=3D"content-type" content=3D"text/html; charset=3Du=
tf-8"><div>The differences in the TR2-4 cylinder heads are well documented, i=
ncluding TeriAnn's. Yes, there are at least two and possibly TR3 high p=
ort castings. Early ones have the rounded thermostat casting and later=
ones have the angled one. However, I have two heads that I have not f=
ound information. These heads are like the TR4A head casting in that t=
hey have the flat between the front stud holes, but are other wise similar t=
o the later TR3 casting. They are stamped 510084 on the flat. TR=
4As are stamped 511695. They might be TR4. They have the two dif=
ferent valve stem sized guides, the step down in diameter of the intake port=
, like high port TR3s and they have the angled t-stat casting. </div><=
div id=3D"AppleMailSignature">Can anyone share some info on these. </d=
iv><div id=3D"AppleMailSignature">Dave H.</div><div id=3D"AppleMailSignature=
"><image1.JPG><image2.JPG><br><br>Sent from my iPad</div><div><b=
r>On Nov 26, 2018, at 11:14 AM, Andrew Uprichard <<a href=3D"mailto:aupri=
chard@uprichard.net">auprichard@uprichard.net</a>> wrote:<br><br></div><b=
lockquote type=3D"cite"><div><meta http-equiv=3D"Content-Type" content=3D"te=
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ord 14 (filtered medium)"><style><!--
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--><div class=3D"WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-family:"Times New Roman","serif&=
quot;">When it comes to the 4-cylinder TR models, I am aware of four variati=
ons 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 h=
igh port head which came with most of the TR3s and the TR4 head with the sma=
ller intake aperture.<o:p></o:p></span></p><p class=3D"MsoNormal"><span styl=
e=3D"font-family:"Times New Roman","serif""><o:p> <=
/o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-family:"Time=
s New Roman","serif"">But someone was talking to me the other=
day about a variation in the high port TR3 head. According to this gu=
y, there was a variation in the thermostat housing, some of which were more s=
loping than rounded. He claimed the sloped design was more attractive a=
s it lended itself to more shaving and thus a better, high compression engin=
e.<o:p></o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-family:&q=
uot;Times New Roman","serif""><o:p> </o:p></span></p><p c=
lass=3D"MsoNormal"><span style=3D"font-family:"Times New Roman",&q=
uot;serif"">I must admit I had never heard about this. I have thr=
ee heads sitting in my barns and all have what appears to be the same, round=
ed underneath to the thermostat housing.<o:p></o:p></span></p><p class=3D"Ms=
oNormal"><span style=3D"font-family:"Times New Roman","serif&=
quot;"><o:p> </o:p></span></p><p class=3D"MsoNormal"><span style=3D"fon=
t-family:"Times New Roman","serif"">Has anyone heard of t=
his?<br><br>Andrew Uprichard<o:p></o:p></span></p><p class=3D"MsoNormal"><sp=
an style=3D"font-family:"Times New Roman","serif"">Jacks=
on, Michigan<o:p></o:p></span></p></div></div></blockquote><blockquote type=3D=
"cite"><div><span>** <a href=3D"mailto:triumphs@autox.team.net";>triumphs@aut=
ox.team.net</a> **</span><br><span></span><br><span>Donate: <a href=3D"http:=
//www.team.net/donate.html">http://www.team.net/donate.html</a></span><br><s=
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eam.net/pipermail/triumphs</a> <a href=3D"http://www.team.net/archive"=
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e/Manage: <a href=3D"http://autox.team.net/mailman/options/triumphs/dlhogye@=
comcast.net">http://autox.team.net/mailman/options/triumphs/dlhogye@comcast.=
net</a></span><br></div></blockquote></div></blockquote><blockquote type=3D"=
cite"><div><span>** <a href=3D"mailto:triumphs@autox.team.net";>triumphs@auto=
x.team.net</a> **</span><br><span></span><br><span>Donate: <a href=3D"http:/=
/www.team.net/donate.html">http://www.team.net/donate.html</a></span><br><sp=
an>Archive: <a href=3D"http://www.team.net/pipermail/triumphs";>http://www.te=
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** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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