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Re: [TR] TR cylinder heads

To: Andrew Uprichard <auprichard@uprichard.net> 61kX1yOrJD2GcQGdft7OS6G+41Cj2AGviZgWT4betpUVSrud6gFV/eloTaizRsEpqJyAJjxKd3fqAx6vE+I0AGTQcWez8H9Kb0c/IAU3fjlKI5RMpeIvu3yb
Subject: Re: [TR] TR cylinder heads
From: Dave <dlhogye@comcast.net>
Date: Thu, 29 Nov 2018 10:31:25 -0800
Cc: triumphs@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <002e01d485bc$44519490$ccf4bdb0$@uprichard.net> <026AA21E-4AC4-4040-94C1-008967AC00DA@comcast.net>
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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? &nbsp;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 &lt;<a href=3D"mailto:dlhogye@comcast=
.net">dlhogye@comcast.net</a>&gt; 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. &nbsp;Yes, there are at least two and possibly TR3 high p=
ort castings. &nbsp;Early ones have the rounded thermostat casting and later=
 ones have the angled one. &nbsp;However, I have two heads that I have not f=
ound information. &nbsp;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. &nbsp;They are stamped 510084 on the flat. &nbsp;TR=
4As are stamped 511695. &nbsp;They might be TR4. &nbsp;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. &nbsp;</div><=
div id=3D"AppleMailSignature">Can anyone share some info on these. &nbsp;</d=
iv><div id=3D"AppleMailSignature">Dave H.</div><div id=3D"AppleMailSignature=
">&lt;image1.JPG&gt;&lt;image2.JPG&gt;<br><br>Sent from my iPad</div><div><b=
r>On Nov 26, 2018, at 11:14 AM, Andrew Uprichard &lt;<a href=3D"mailto:aupri=
chard@uprichard.net">auprichard@uprichard.net</a>&gt; wrote:<br><br></div><b=
lockquote type=3D"cite"><div><meta http-equiv=3D"Content-Type" content=3D"te=
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</o:shapelayout></xml><![endif]--><div class=3D"WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-family:&quot;Times New Roman&quot;,&quot;serif&=
quot;">When it comes to the 4-cylinder TR models, I am aware of four variati=
ons on cylinder head design:&nbsp; 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:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p>&nbsp;<=
/o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Time=
s New Roman&quot;,&quot;serif&quot;">But someone was talking to me the other=
 day about a variation in the high port TR3 head.&nbsp; According to this gu=
y, there was a variation in the thermostat housing, some of which were more s=
loping than rounded.&nbsp; 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&quot;,&quot;serif&quot;"><o:p>&nbsp;</o:p></span></p><p c=
lass=3D"MsoNormal"><span style=3D"font-family:&quot;Times New Roman&quot;,&q=
uot;serif&quot;">I must admit I had never heard about this.&nbsp; 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:&quot;Times New Roman&quot;,&quot;serif&=
quot;"><o:p>&nbsp;</o:p></span></p><p class=3D"MsoNormal"><span style=3D"fon=
t-family:&quot;Times New Roman&quot;,&quot;serif&quot;">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:&quot;Times New Roman&quot;,&quot;serif&quot;">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=
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