Subject: [TR] Aluminum head?

From: Paul Dorsey <[email-masked]>
Date: Mon, 2 Sep 2019 21:10:07 -0400

--===============6123387306236316086==

--00000000000074191205919bc049
Content-Transfer-Encoding: quoted-printable

Gotcha!  I may be dumb but   I I am dumb, but,I=E2=80=99m no dummy, I don=
=E2=80=99t have an
aluminum head on my motor. Do theymake aluminum heads for our motor or do
they? Anyway they=E2=80=99re out of my price range.

  As I was loosening the bolts that hold the head on,  I got to thinking, I
wonder if there is a sequence for loosening these head nuts .   Metal
bends, You know. Perhaps that is more critical for something like aluminum
heads.

--00000000000074191205919bc049
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Gotcha!=C2=A0 I may be dumb but =C2=A0 I I am dumb, but,I=
=E2=80=99m no dummy, I don=E2=80=99t have an aluminum head on my motor. Do =
theymake aluminum heads for our motor or do they? Anyway they=E2=80=99re ou=
t of my price range.</div><div dir=3D"auto">=C2=A0=C2=A0</div><div dir=3D"a=
uto">=C2=A0 As I was loosening the bolts that hold the head on, =C2=A0I got=
 to thinking, I wonder if there is a sequence for loosening these head nuts=
 . =C2=A0 Metal bends, You know. Perhaps that is more critical for somethin=
g like aluminum heads.</div><div dir=3D"auto"><br></div>

--00000000000074191205919bc049--

--===============6123387306236316086==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

** [email-masked] **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive

--===============6123387306236316086==--

---

From: DAVID MASSEY <[email-masked]>
Date: Tue, 3 Sep 2019 12:05:07 +0000 (UTC)

--===============6273530591329975659==
	boundary="----=_Part_1041739_817730310.1567512307375"

------=_Part_1041739_817730310.1567512307375
Content-Transfer-Encoding: quoted-printable

 The combustion chamber size will need to be bigger to avoid having a compr=
ession ratio of 15:1. OK, maybe a little hyperbolic but the longer stroke n=
eeds a larger chamber.=C2=A0 A friend had issues on his TR250 which turned =
out to be a GT6 head on the 250 block.=C2=A0 Compression was crazy high and=
 the intake manifold didn't quite fit.
But I agree with you.=C2=A0 There are quite a few TR6 owners with deep pock=
ets (just ask Rich Good) and an OHC inline 6 is way cool.
=20
Dave=20

=20
=20
-----Original Message-----
From: Greg Lemon <[email-masked]>
To: Michael Porter <[email-masked]>
Cc: Triumphs <[email-masked]>
Sent: Mon, Sep 2, 2019 11:36 pm
Subject: Re: [TR] Aluminum head?

So will an aluminum cross flow GT6 head fit a 2.5 liter too?=C2=A0 If so th=
e offset bonnet bulge club would like to know which side is intake on?
My work on my high flow cast iron head has kind of stalled out.=C2=A0

Greg LemonTR250

On Mon, Sep 2, 2019, 10:40 PM Michael Porter <[email-masked]> wrote:

On 9/2/2019 9:11 PM, [email-masked] wrote:
> Oh wow, my =E2=80=9866 TR4 Motor has an aluminium head, am I doomed?=C2=
=A0 Discovered a water leak after I bought it, bad weld job on the one of c=
hannels in the block that fouled the head seal.=C2=A0 Filed it, fixed it, r=
emember only 70ftlbs on the studs.=C2=A0 ISTR the liners were not as proud =
of the block as some say they should be.

You've probably averted problems because the liners weren't sticking up=20
to spec (especially toward the high side of the tolerance).

It's a curious situation.=C2=A0 The heads aren't wildly popular because of=
=20
the price, so the number of them actually out there is pretty small,=20
relatively speaking.=C2=A0 But, they also might be fairly rare because the=
=20
few people that did buy them couldn't get them to seal and, thinking it=20
was their fault, that there was something special about the product that=20
they didn't understand, and went back to cast-iron heads.

I knew there was at least one person on the list with one, and I think=20
two, because I remember a message maybe a couple of decades ago, in the=20
early days of the list, from someone having trouble getting one to seal=20
properly.

(Not against aluminum heads, at all.=C2=A0 There are advantages to them.=C2=
=A0 I=20
just think, because of the small variability of the figure-eight gaskets=20
and the cylinder heights, that they're probably ill-suited, in the=20
configuration they're being produced, for wet-sleeve engines.=C2=A0 I've be=
en=20
designing, off and on, on a 4-valve OHC head for the GT6 which, now that=20
there's machinable wax available for 3D-printers, can be 3D-printed and=20
investment-cast.)

Cheers.

--=20

Michael Porter
Roswell, NM

Never let anyone drive you crazy when you know it's within walking distance=
....

------=_Part_1041739_817730310.1567512307375
Content-Transfer-Encoding: quoted-printable

<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">The combustion chamber size will need to be bigger t=
o avoid having a compression ratio of 15:1. OK, maybe a little hyperbolic b=
ut the longer stroke needs a larger chamber.&nbsp; A friend had issues on h=
is TR250 which turned out to be a GT6 head on the 250 block.&nbsp; Compress=
ion was crazy high and the intake manifold didn't quite fit.</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">But I agree with you.&nbsp; There are quite a few TR6=
 owners with deep pockets (just ask Rich Good) and an OHC inline 6 is way c=
ool.</font><br>
</div>

<div> <br>
</div>

<div style=3D"clear:both"><font size=3D"4">Dave </font><br>
<br>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Greg Lemon &lt;[email-masked]&gt;<br>
To: Michael Porter &lt;[email-masked]&gt;<br>
Cc: Triumphs &lt;[email-masked]&gt;<br>
Sent: Mon, Sep 2, 2019 11:36 pm<br>
Subject: Re: [TR] Aluminum head?<br>
<br>

<div id=3D"yiv5859829621">
<div>
<div>So will an aluminum cross flow GT6 head fit a 2.5 liter too?&nbsp; If =
so the offset bonnet bulge club would like to know which side is intake on?
<div><br clear=3D"none"></div>

<div>My work on my high flow cast iron head has kind of stalled out.&nbsp;<=
br clear=3D"none">
<div><br clear=3D"none"></div>

<div>Greg Lemon</div>

<div>TR250</div>

<div><br clear=3D"none"></div>
</div>
</div>
<br clear=3D"none">
<div class=3D"yiv5859829621gmail_quote">
<div class=3D"yiv5859829621yqt7283203215" id=3D"yiv5859829621yqtfd21208">
<div class=3D"yiv5859829621gmail_attr" dir=3D"ltr">On Mon, Sep 2, 2019, 10:=
40 PM Michael Porter &lt;<a rel=3D"noopener noreferrer" shape=3D"rect" ymai=
lto=3D"mailto:[email-masked]" target=3D"_blank" removedlink__7cfab060-b10=
b-4851-b8b0-0f7bec323e6b__href=3D"mailto:[email-masked]">[email-masked]=
</a>&gt; wrote:<br clear=3D"none"></div>
</div>
<blockquote class=3D"yiv5859829621gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex;">
<div class=3D"yiv5859829621yqt7283203215" id=3D"yiv5859829621yqtfd85832">On=
 9/2/2019 9:11 PM, <a rel=3D"noopener noreferrer" shape=3D"rect" ymailto=3D=
"mailto:[email-masked]" target=3D"_blank" removedlink__7cfab060-b10b-4851=
-b8b0-0f7bec323e6b__href=3D"mailto:[email-masked]">[email-masked]</a> w=
rote:<br clear=3D"none">
&gt; Oh wow, my =E2=80=9866 TR4 Motor has an aluminium head, am I doomed?&n=
bsp; Discovered a water leak after I bought it, bad weld job on the one of =
channels in the block that fouled the head seal.&nbsp; Filed it, fixed it, =
remember only 70ftlbs on the studs.&nbsp; ISTR the liners were not as proud=
 of the block as some say they should be.<br clear=3D"none">
<br clear=3D"none">
You've probably averted problems because the liners weren't sticking up <br=
 clear=3D"none">
to spec (especially toward the high side of the tolerance).<br clear=3D"non=
e">
<br clear=3D"none">
It's a curious situation.&nbsp; The heads aren't wildly popular because of =
<br clear=3D"none">
the price, so the number of them actually out there is pretty small, <br cl=
ear=3D"none">
relatively speaking.&nbsp; But, they also might be fairly rare because the =
<br clear=3D"none">
few people that did buy them couldn't get them to seal and, thinking it <br=
 clear=3D"none">
was their fault, that there was something special about the product that <b=
r clear=3D"none">
they didn't understand, and went back to cast-iron heads.<br clear=3D"none"=
<br clear=3D"none">
I knew there was at least one person on the list with one, and I think <br =
clear=3D"none">
two, because I remember a message maybe a couple of decades ago, in the <br=
 clear=3D"none">
early days of the list, from someone having trouble getting one to seal <br=
 clear=3D"none">
properly.<br clear=3D"none">
<br clear=3D"none">
(Not against aluminum heads, at all.&nbsp; There are advantages to them.&nb=
sp; I <br clear=3D"none">
just think, because of the small variability of the figure-eight gaskets <b=
r clear=3D"none">
and the cylinder heights, that they're probably ill-suited, in the <br clea=
r=3D"none">
configuration they're being produced, for wet-sleeve engines.&nbsp; I've be=
en <br clear=3D"none">
designing, off and on, on a 4-valve OHC head for the GT6 which, now that <b=
r clear=3D"none">
there's machinable wax available for 3D-printers, can be 3D-printed and <br=
 clear=3D"none">
investment-cast.)<br clear=3D"none">
<br clear=3D"none">
<br clear=3D"none">
Cheers.<br clear=3D"none">
<br clear=3D"none">
-- <br clear=3D"none">
<br clear=3D"none">
<br clear=3D"none">
Michael Porter<br clear=3D"none">
Roswell, NM<br clear=3D"none">
<br clear=3D"none">
<br clear=3D"none">
Never let anyone drive you crazy when you know it's within walking distance=
....<br clear=3D"none">
<br clear=3D"none">
</div>
</blockquote></div>
</div>
</div>
<br>
</div>
</div>

------=_Part_1041739_817730310.1567512307375--

--===============6273530591329975659==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

--===============6273530591329975659==--