Subject: Re: [TR] Aluminum head?

From: "[email-masked]" <[email-masked]>
Date: Mon, 2 Sep 2019 20:18:22 -0500

Yes, Moss carries an aluminum head, about $3,000.  I don’t worry about any sequence for loosening, for tightening  use the sequence in the book, after tightening to 50ftlbs tighten in steps of 20ftlbs through the sequence until you get to the specified 105ftlbs.  
Bill

Sent from my IBM 8088

On Sep 2, 2019, at 8:10 PM, Paul Dorsey <[email-masked]> wrote:

Gotcha!  I may be dumb but   I I am dumb, but,I’m no dummy, I don’t have an aluminum head on my motor. Do theymake aluminum heads for our motor or do they? Anyway they’re 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.

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From: Michael Porter <[email-masked]>
Date: Mon, 2 Sep 2019 19:50:29 -0600

On 9/2/2019 7:10 PM, Paul Dorsey wrote:
> Gotcha!  I may be dumb but   I I am dumb, but,I’m no dummy, I don’t 
> have an aluminum head on my motor. Do theymake aluminum heads for our 
> motor or do they? Anyway they’re 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.

There have been attempts at making aluminum heads for the wet-sleeve 
engines, but they've been largely unsuccessful, for one major 
reason--they have been designed as analogues of the cast-iron head done 
in aluminum--dimensionally and in configuration, they're duplicates of 
the original.  For that reason, they don't have the mechanical strength 
of the cast-iron heads, and can't force down the liners as well as the 
originals, and therefore tend to leak.  There are a couple of people on 
the lists who have installed them on their engines.

The problem is beam strength.  Cast aluminum simply isn't as strong as 
cast iron, so if the dimensions are identical, then the cast aluminum 
head will tend to bend around the liners rather than punching them down 
into the figure-eight gaskets.  That produces leaks at the head gasket.  
An aluminum head for the engine is a good idea, but not as currently 
done.  Future examples really should consider radical redesigns to 
accommodate wet-sleeve construction, in the way of increasing beam 
strength.  I've done some preliminary work on just that--thicker, taller 
heads in which the outer perimeter is raised and thickened, using a 
flatter cast valve cover socketed into the upper surface so it occupies 
the same space.  And, of course, adding crossflow port configuration, 
which should have been done right from the start.  It also wouldn't hurt 
to machine the block lower cylinder lands smooth and machine the 
cylinders for o-rings, which solves the figure-8 gasket compression 
sealing problem.  The cylinders only need to stand proud enough (a 
thousandth or so) to ensure that the cylinder head locks them to the 
block so they don't travel up and down with piston motion.

Something like that would work pretty well, methinks.

Cheers.

-- 

Michael Porter
Roswell, NM

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

---

From: Don Hiscock <[email-masked]>
Date: Mon, 2 Sep 2019 20:53:58 -0500

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I believe the aluminum head marketed by Moss and developed through the
cooperation and financial capital of the TR Register (UK) Spares
Development Fund has been pretty successful.  At least in terms of numbers
sold it has, and I've not heard of any inherent issues with it.

Not for everyone, of course, but for those who are interested this is an
option.

Don
Saint Louis MO
1962 TR3B

On Mon, Sep 2, 2019 at 8:50 PM Michael Porter <[email-masked]> wrote:

> > Gotcha!  I may be dumb but   I I am dumb, but,I=E2=80=99m no dummy, I d=
on=E2=80=99t
> > motor or do they? Anyway they=E2=80=99re out of my price range.
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/[email-masked]
>

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<div dir=3D"ltr">I believe the aluminum head marketed by Moss and developed=
 through the cooperation and financial capital of the TR Register (UK) Spar=
es Development Fund has been pretty successful.=C2=A0 At least in terms of =
numbers sold it has, and I&#39;ve not heard of any inherent issues with it.=
<div><br></div><div>Not for everyone, of course, but for those who are inte=
rested this is an option.</div><div><br></div><div>Don</div><div>Saint Loui=
s MO</div><div>1962 TR3B</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2, 2019 at 8:50 PM Michael Porter=
 &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">On 9/2/2019 7:10 P=
M, Paul Dorsey wrote:<br>
&gt; 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 <br>
&gt; have an aluminum head on my motor. Do theymake aluminum heads for our =
<br>
&gt; motor or do they? Anyway they=E2=80=99re out of my price range.<br>
&gt; =C2=A0 As I was loosening the bolts that hold the head on, =C2=A0I got=
 to <br>
&gt; thinking, I wonder if there is a sequence for loosening these head <br=
&gt; nuts . =C2=A0 Metal bends, You know. Perhaps that is more critical for=
 <br>
&gt; something like aluminum heads.<br>
<br>
<br>
There have been attempts at making aluminum heads for the wet-sleeve <br>
engines, but they&#39;ve been largely unsuccessful, for one major <br>
reason--they have been designed as analogues of the cast-iron head done <br=
in aluminum--dimensionally and in configuration, they&#39;re duplicates of =
<br>
the original.=C2=A0 For that reason, they don&#39;t have the mechanical str=
ength <br>
of the cast-iron heads, and can&#39;t force down the liners as well as the =
<br>
originals, and therefore tend to leak.=C2=A0 There are a couple of people o=
n <br>
the lists who have installed them on their engines.<br>
<br>
The problem is beam strength.=C2=A0 Cast aluminum simply isn&#39;t as stron=
g as <br>
cast iron, so if the dimensions are identical, then the cast aluminum <br>
head will tend to bend around the liners rather than punching them down <br=
into the figure-eight gaskets.=C2=A0 That produces leaks at the head gasket=
.=C2=A0 <br>
An aluminum head for the engine is a good idea, but not as currently <br>
done.=C2=A0 Future examples really should consider radical redesigns to <br=
accommodate wet-sleeve construction, in the way of increasing beam <br>
strength.=C2=A0 I&#39;ve done some preliminary work on just that--thicker, =
taller <br>
heads in which the outer perimeter is raised and thickened, using a <br>
flatter cast valve cover socketed into the upper surface so it occupies <br=
the same space.=C2=A0 And, of course, adding crossflow port configuration, =
<br>
which should have been done right from the start.=C2=A0 It also wouldn&#39;=
t hurt <br>
to machine the block lower cylinder lands smooth and machine the <br>
cylinders for o-rings, which solves the figure-8 gasket compression <br>
sealing problem.=C2=A0 The cylinders only need to stand proud enough (a <br=
thousandth or so) to ensure that the cylinder head locks them to the <br>
block so they don&#39;t travel up and down with piston motion.<br>
<br>
Something like that would work pretty well, methinks.<br>
<br>
<br>
Cheers.<br>
<br>
-- <br>
<br>
<br>
Michael Porter<br>
Roswell, NM<br>
<br>
<br>
Never let anyone drive you crazy when you know it&#39;s within walking dist=
ance....<br>
<br>
<br>
** <a href=3D"mailto:[email-masked]" target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
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</blockquote></div>

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From: Paul Dorsey <[email-masked]>
Date: Mon, 2 Sep 2019 22:19:03 -0400

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Thanks!

On Mon, Sep 2, 2019 at 9:18 PM [email-masked] <[email-masked]> wrote:

> Yes, Moss carries an aluminum head, about $3,000.  I don=E2=80=99t worry =
about any
> sequence for loosening, for tightening  use the sequence in the book, aft=
er
> tightening to 50ftlbs tighten in steps of 20ftlbs through the sequence
> until you get to the specified 105ftlbs.
> Bill
>
> Sent from my IBM 8088
>
> 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 aluminu=
m
> heads.
> http://autox.team.net/mailman/options/triumphs/[email-masked]
>
>

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<div dir=3D"ltr">Thanks!=C2=A0<br></div><br><div class=3D"gmail_quote"><div=
 dir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2, 2019 at 9:18 PM <a href=3D=
"mailto:[email-masked]">[email-masked]</a> &lt;<a href=3D"mailto:wbeech=
@flash.net">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex">Yes, Moss carries an aluminum head, about $3,00=
0.=C2=A0 I don=E2=80=99t worry about any sequence for loosening, for tighte=
ning=C2=A0 use the sequence in the book, after tightening to 50ftlbs tighte=
n in steps of 20ftlbs through the sequence until you get to the specified 1=
05ftlbs.=C2=A0 <br>
Bill<br>
<br>
Sent from my IBM 8088<br>
<br>
On Sep 2, 2019, at 8:10 PM, Paul Dorsey &lt;<a href=3D"mailto:dorpaul1@gmai=
l.com" target=3D"_blank">[email-masked]</a>&gt; wrote:<br>
<br>
Gotcha!=C2=A0 I may be dumb but=C2=A0 =C2=A0I I am dumb, but,I=E2=80=99m no=
 dummy, I don=E2=80=99t have an aluminum head on my motor. Do theymake alum=
inum heads for our motor or do they? Anyway they=E2=80=99re out of my price=
 range.<br>
<br>
=C2=A0 As I was loosening the bolts that hold the head on,=C2=A0 I got to t=
hinking, I wonder if there is a sequence for loosening these head nuts .=C2=
=A0 =C2=A0Metal bends, You know. Perhaps that is more critical for somethin=
g like aluminum heads.<br>
<br>
** <a href=3D"mailto:[email-masked]" target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
<br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
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"http://www.team.net/archive" rel=3D"noreferrer" target=3D"_blank">http://w=
ww.team.net/archive</a><br>
<br>
hs/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.team=
.net/mailman/options/triumphs/[email-masked]</a><br>
<br>
</blockquote></div>

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From: Paul Dorsey <[email-masked]>
Date: Mon, 2 Sep 2019 22:25:18 -0400

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Why don't more cars have wet sleeve engines?  What was the weekness of this
idea?

On Mon, Sep 2, 2019 at 10:19 PM Paul Dorsey <[email-masked]> wrote:

>> Yes, Moss carries an aluminum head, about $3,000.  I don=E2=80=99t worry=
 about
>> any sequence for loosening, for tightening  use the sequence in the book=
,
>> after tightening to 50ftlbs tighten in steps of 20ftlbs through the
>> sequence until you get to the specified 105ftlbs.
>> Bill
>>
>> Sent from my IBM 8088
>>
>> Gotcha!  I may be dumb but   I I am dumb, but,I=E2=80=99m no dummy, I do=
n=E2=80=99t have
>> an aluminum head on my motor. Do theymake aluminum heads for our motor o=
r
>>   As I was loosening the bolts that hold the head on,  I got to thinking=
,
>> bends, You know. Perhaps that is more critical for something like alumin=
um
>> http://autox.team.net/mailman/options/triumphs/[email-masked]

--0000000000006ae63d05919ccd09
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Why don&#39;t more cars have wet sleeve engines?=C2=A0 Wha=
t was the weekness of this idea?</div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2, 2019 at 10:19 PM Paul Dorsey=
 &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote=
:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"lt=
r">Thanks!=C2=A0<br></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" c=
lass=3D"gmail_attr">On Mon, Sep 2, 2019 at 9:18 PM <a href=3D"mailto:Wbeech=
@flash.net" target=3D"_blank">[email-masked]</a> &lt;<a href=3D"mailto:wb=
[email-masked]" target=3D"_blank">[email-masked]</a>&gt; wrote:<br></div>=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">Yes, Moss carries an alum=
inum head, about $3,000.=C2=A0 I don=E2=80=99t worry about any sequence for=
 loosening, for tightening=C2=A0 use the sequence in the book, after tighte=
ning to 50ftlbs tighten in steps of 20ftlbs through the sequence until you =
get to the specified 105ftlbs.=C2=A0 <br>
Bill<br>
<br>
Sent from my IBM 8088<br>
<br>
On Sep 2, 2019, at 8:10 PM, Paul Dorsey &lt;<a href=3D"mailto:dorpaul1@gmai=
l.com" target=3D"_blank">[email-masked]</a>&gt; wrote:<br>
<br>
Gotcha!=C2=A0 I may be dumb but=C2=A0 =C2=A0I I am dumb, but,I=E2=80=99m no=
 dummy, I don=E2=80=99t have an aluminum head on my motor. Do theymake alum=
inum heads for our motor or do they? Anyway they=E2=80=99re out of my price=
 range.<br>
<br>
=C2=A0 As I was loosening the bolts that hold the head on,=C2=A0 I got to t=
hinking, I wonder if there is a sequence for loosening these head nuts .=C2=
=A0 =C2=A0Metal bends, You know. Perhaps that is more critical for somethin=
g like aluminum heads.<br>
<br>
** <a href=3D"mailto:[email-masked]" target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
<br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
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.net/mailman/options/triumphs/[email-masked]</a><br>
<br>
</blockquote></div>
</blockquote></div>

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From: Greg Lemon <[email-masked]>
Date: Mon, 2 Sep 2019 21:38:40 -0500

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On the manifold, not much concern about loosening the liners when you take
the manifold off, manifold shouldn't be stuck with all the nuts off, a
little leverage or soft pop with a lead hammer should take it right off.

Your main concern RE the liners popping loose is turning the engine,
pulling the head off or jockeying it around shouldn't loosen them up,
friction from rings on liner sliding up might.

Greg Lemon
TR250
On Mon, Sep 2, 2019, 9:25 PM Paul Dorsey <[email-masked]> wrote:

> Why don't more cars have wet sleeve engines?  What was the weekness of
> this idea?
>
>> On Mon, Sep 2, 2019 at 9:18 PM [email-masked] <[email-masked]> wrote=
:
>>
>>> Yes, Moss carries an aluminum head, about $3,000.  I don=E2=80=99t worr=
y about
>>> any sequence for loosening, for tightening  use the sequence in the boo=
k,
>>> Gotcha!  I may be dumb but   I I am dumb, but,I=E2=80=99m no dummy, I d=
on=E2=80=99t have
>>> an aluminum head on my motor. Do theymake aluminum heads for our motor =
or
>>> thinking, I wonder if there is a sequence for loosening these head nuts=
 .
>>>  Metal bends, You know. Perhaps that is more critical for something lik=
e
>>> aluminum heads.
> http://autox.team.net/mailman/options/triumphs/[email-masked]
>

--000000000000391d3f05919cfdd3
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<div dir=3D"auto"><div>On the manifold, not much concern about loosening th=
e liners when you take the manifold off, manifold shouldn&#39;t be stuck wi=
th all the nuts off, a little leverage or soft pop with a lead hammer shoul=
d take it right off.=C2=A0=C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Your main concern RE the liners popping loose is turning the engi=
ne, pulling the head off or jockeying it around shouldn&#39;t loosen them u=
p, friction from rings on liner sliding up might.</div><div dir=3D"auto"><b=
r></div><div dir=3D"auto">Greg Lemon</div><div dir=3D"auto">TR250<br><div c=
lass=3D"gmail_quote" dir=3D"auto"><div dir=3D"ltr" class=3D"gmail_attr">On =
Mon, Sep 2, 2019, 9:25 PM Paul Dorsey &lt;<a href=3D"mailto:dorpaul1@gmail.=
com">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex"><div dir=3D"ltr">Why don&#39;t more cars have wet sleeve engines?=C2=A0=
 What was the weekness of this idea?</div><br><div class=3D"gmail_quote"><d=
iv dir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2, 2019 at 10:19 PM Paul Do=
rsey &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"nor=
eferrer">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex"><div dir=3D"ltr">Thanks!=C2=A0<br></div><br><div=
 class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2,=
 2019 at 9:18 PM <a href=3D"mailto:[email-masked]" target=3D"_blank" rel=
=3D"noreferrer">[email-masked]</a> &lt;<a href=3D"mailto:[email-masked]=
" target=3D"_blank" rel=3D"noreferrer">[email-masked]</a>&gt; wrote:<br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">Yes, Moss carries an=
 aluminum head, about $3,000.=C2=A0 I don=E2=80=99t worry about any sequenc=
e for loosening, for tightening=C2=A0 use the sequence in the book, after t=
ightening to 50ftlbs tighten in steps of 20ftlbs through the sequence until=
 you get to the specified 105ftlbs.=C2=A0 <br>
Bill<br>
<br>
Sent from my IBM 8088<br>
<br>
On Sep 2, 2019, at 8:10 PM, Paul Dorsey &lt;<a href=3D"mailto:dorpaul1@gmai=
l.com" target=3D"_blank" rel=3D"noreferrer">[email-masked]</a>&gt; wrot=
e:<br>
<br>
Gotcha!=C2=A0 I may be dumb but=C2=A0 =C2=A0I I am dumb, but,I=E2=80=99m no=
 dummy, I don=E2=80=99t have an aluminum head on my motor. Do theymake alum=
inum heads for our motor or do they? Anyway they=E2=80=99re out of my price=
 range.<br>
<br>
=C2=A0 As I was loosening the bolts that hold the head on,=C2=A0 I got to t=
hinking, I wonder if there is a sequence for loosening these head nuts .=C2=
=A0 =C2=A0Metal bends, You know. Perhaps that is more critical for somethin=
g like aluminum heads.<br>
<br>
** <a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"nore=
ferrer">[email-masked]</a> **<br>
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errer" target=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
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<br>
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<br>
</blockquote></div>
</blockquote></div>
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From: Michael Porter <[email-masked]>
Date: Mon, 2 Sep 2019 20:41:37 -0600

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> Why don't more cars have wet sleeve engines?  What was the weekness of 

Remember that the wet-sleeve engine in your car was first introduced 
with the Standard Vanguard in something like 1937-38. It was expensive 
to remove an engine for machining the bores, and with wet sleeves, the 
bores could be removed and replaced with the block in the car, or, in a 
pinch, machined on a lathe.  And, there was good heat transfer from the 
bores to the coolant, so it made sense at the time.  The other 
consideration was that the material that made really long-lasting 
cylinder bore material wasn't that easy to cast in big lumps, like 
engine blocks, without defects. And, an engine block with all that open 
space without cast-in-place bores was simpler to design and cast, and 
was more tolerant of commonplace errors in casting such as core shifts.

Over time, casting science improved, cylinder blocks were improved, 
materials science produced iron alloys that flowed well /and/ had good 
bore-wear characteristics, so wet-sleeve engines became pretty rare 
(except for really huge stationary engines which can't just be yanked 
and sent to the machine shop).

Cheers.

-- 

Michael Porter
Roswell, NM

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    <div class="moz-cite-prefix">On 9/2/2019 8:25 PM, Paul Dorsey wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">Why don't more cars have wet sleeve engines?  What
        was the weekness of this idea?</div>
    </blockquote>
    <p>Remember that the wet-sleeve engine in your car was first
      introduced with the Standard Vanguard in something like 1937-38. 
      It was expensive to remove an engine for machining the bores, and
      with wet sleeves, the bores could be removed and replaced with the
      block in the car, or, in a pinch, machined on a lathe.  And, there
      was good heat transfer from the bores to the coolant, so it made
      sense at the time.  The other consideration was that the material
      that made really long-lasting cylinder bore material wasn't that
      easy to cast in big lumps, like engine blocks, without defects. 
      And, an engine block with all that open space without
      cast-in-place bores was simpler to design and cast, and was more
      tolerant of commonplace errors in casting such as core shifts.<br>
    </p>
    <p>Over time, casting science improved, cylinder blocks were
      improved, materials science produced iron alloys that flowed well
      <i>and</i> had good bore-wear characteristics, so wet-sleeve
      engines became pretty rare (except for really huge stationary
      engines which can't just be yanked and sent to the machine shop).</p>
    <p><br>
    </p>
    <p>Cheers.<br>
    </p>
    <p><br>
    </p>
    <pre class="moz-signature" cols="72">-- 

Michael Porter
Roswell, NM

Never let anyone drive you crazy when you know it's within walking distance....</pre>
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From: Paul Dorsey <[email-masked]>
Date: Mon, 2 Sep 2019 22:51:07 -0400

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Thanks for the tip. Is there a total of eight nuts holding the manifolds
on?  I've only removed the top 4 so far.

On Mon, Sep 2, 2019 at 10:38 PM Greg Lemon <[email-masked]> wrote:

> On the manifold, not much concern about loosening the liners when you tak=
e
>>>> Yes, Moss carries an aluminum head, about $3,000.  I don=E2=80=99t wor=
ry about
>>>> any sequence for loosening, for tightening  use the sequence in the bo=
ok,
>>>> 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.
>>>>
>>>> thinking, I wonder if there is a sequence for loosening these head nut=
s .
>>>>  Metal bends, You know. Perhaps that is more critical for something li=
ke
>> http://autox.team.net/mailman/options/triumphs/[email-masked]

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<div dir=3D"ltr">Thanks for the tip. Is there a total of eight nuts holding=
 the manifolds on?=C2=A0 I&#39;ve only removed the top 4 so far.<br></div><=
br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon,=
 Sep 2, 2019 at 10:38 PM Greg Lemon &lt;<a href=3D"mailto:[email-masked]"=
>[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);p=
adding-left:1ex"><div dir=3D"auto"><div>On the manifold, not much concern a=
bout loosening the liners when you take the manifold off, manifold shouldn&=
#39;t be stuck with all the nuts off, a little leverage or soft pop with a =
lead hammer should take it right off.=C2=A0=C2=A0</div><div dir=3D"auto"><b=
r></div><div dir=3D"auto">Your main concern RE the liners popping loose is =
turning the engine, pulling the head off or jockeying it around shouldn&#39=
;t loosen them up, friction from rings on liner sliding up might.</div><div=
 dir=3D"auto"><br></div><div dir=3D"auto">Greg Lemon</div><div dir=3D"auto"=
>TR250<br><div class=3D"gmail_quote" dir=3D"auto"><div dir=3D"ltr" class=3D=
"gmail_attr">On Mon, Sep 2, 2019, 9:25 PM Paul Dorsey &lt;<a href=3D"mailto=
:[email-masked]" target=3D"_blank">[email-masked]</a>&gt; wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">W=
hy don&#39;t more cars have wet sleeve engines?=C2=A0 What was the weekness=
 of this idea?</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Mon, Sep 2, 2019 at 10:19 PM Paul Dorsey &lt;<a href=3D"=
mailto:[email-masked]" rel=3D"noreferrer" target=3D"_blank">dorpaul1@gm=
ail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"ltr">Thanks!=C2=A0<br></div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2, 2019 at 9:18 PM <a =
href=3D"mailto:[email-masked]" rel=3D"noreferrer" target=3D"_blank">Wbeec=
[email-masked]</a> &lt;<a href=3D"mailto:[email-masked]" rel=3D"noreferrer" =
target=3D"_blank">[email-masked]</a>&gt; wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex">Yes, Moss carries an aluminum head, about=
 $3,000.=C2=A0 I don=E2=80=99t worry about any sequence for loosening, for =
tightening=C2=A0 use the sequence in the book, after tightening to 50ftlbs =
tighten in steps of 20ftlbs through the sequence until you get to the speci=
fied 105ftlbs.=C2=A0 <br>
Bill<br>
<br>
Sent from my IBM 8088<br>
<br>
On Sep 2, 2019, at 8:10 PM, Paul Dorsey &lt;<a href=3D"mailto:dorpaul1@gmai=
l.com" rel=3D"noreferrer" target=3D"_blank">[email-masked]</a>&gt; wrot=
e:<br>
<br>
Gotcha!=C2=A0 I may be dumb but=C2=A0 =C2=A0I I am dumb, but,I=E2=80=99m no=
 dummy, I don=E2=80=99t have an aluminum head on my motor. Do theymake alum=
inum heads for our motor or do they? Anyway they=E2=80=99re out of my price=
 range.<br>
<br>
=C2=A0 As I was loosening the bolts that hold the head on,=C2=A0 I got to t=
hinking, I wonder if there is a sequence for loosening these head nuts .=C2=
=A0 =C2=A0Metal bends, You know. Perhaps that is more critical for somethin=
g like aluminum heads.<br>
<br>
** <a href=3D"mailto:[email-masked]" rel=3D"noreferrer" target=3D"=
_blank">[email-masked]</a> **<br>
<br>
errer" target=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
er noreferrer" target=3D"_blank">http://www.team.net/pipermail/triumphs</a>=
 <a href=3D"http://www.team.net/archive" rel=3D"noreferrer noreferrer" targ=
et=3D"_blank">http://www.team.net/archive</a><br>
<br>
hs/[email-masked]" rel=3D"noreferrer noreferrer" target=3D"_blank">http:/=
/autox.team.net/mailman/options/triumphs/[email-masked]</a><br>
<br>
</blockquote></div>
</blockquote></div>
** <a href=3D"mailto:[email-masked]" rel=3D"noreferrer" target=3D"=
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From: "[email-masked]" <[email-masked]>
Date: Mon, 2 Sep 2019 22:11:45 -0500

Oh wow, my ‘66 TR4 Motor has an aluminium head, am I doomed?  Discovered a water leak after I bought it, bad weld job on the one of channels in the block that fouled the head seal.  Filed it, fixed it, remember only 70ftlbs on the studs.  ISTR the liners were not as proud of the block as some say they should be.  
Bill
Sent from my IBM 8088

>   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…

There have been attempts at making aluminum heads for the wet-sleeve engines, but they've been largely unsuccessful, for one major reason--they have been designed as analogues of the cast-iron head done in aluminum--dimensionally and in configuration, they're duplicates of the original.  For that reason, they don't have the mechanical strength of the cast-iron heads, and can't force down the liners as well as the originals, and therefore tend to leak.  There are a couple of people on the lists who have installed them on their engines.

The problem is beam strength.  Cast aluminum simply isn't as strong as cast iron, so if the dimensions are identical, then the cast aluminum head will tend to bend around the liners rather than punching them down into the figure-eight gaskets.  That produces leaks at the head gasket.  An aluminum head for the engine is a good idea, but not as currently done.  Future examples really should consider radical redesigns to accommodate wet-sleeve construction, in the way of increasing beam strength.  I've done some preliminary work on just that--thicker, taller heads in which the outer perimeter is raised and thickened, using a flatter cast valve cover socketed into the upper surface so it occupies the same space.  And, of course, adding crossflow port configuration, which should have been done right from the start.  It also wouldn't hurt to machine the block lower cylinder lands smooth and machine the cylinders for o-rings, which solves the figure-8 gasket compression sealing problem.  The cylinders only need to stand proud enough (a thousandth or so) to ensure that the cylinder head locks them to the block so they don't travel up and down with piston motion.

>   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…

There have been attempts at making aluminum heads for the wet-sleeve engines, but they've been largely unsuccessful, for one major reason--they have been designed as analogues of the cast-iron head done in aluminum--dimensionally and in configuration, they're duplicates of the original.  For that reason, they don't have the mechanical strength of the cast-iron heads, and can't force down the liners as well as the originals, and therefore tend to leak.  There are a couple of people on the lists who have installed them on their engines.

The problem is beam strength.  Cast aluminum simply isn't as strong as cast iron, so if the dimensions are identical, then the cast aluminum head will tend to bend around the liners rather than punching them down into the figure-eight gaskets.  That produces leaks at the head gasket.  An aluminum head for the engine is a good idea, but not as currently done.  Future examples really should consider radical redesigns to accommodate wet-sleeve construction, in the way of increasing beam strength.  I've done some preliminary work on just that--thicker, taller heads in which the outer perimeter is raised and thickened, using a flatter cast valve cover socketed into the upper surface so it occupies the same space.  And, of course, adding crossflow port configuration, which should have been done right from the start.  It also wouldn't hurt to machine the block lower cylinder lands smooth and machine the cylinders for o-rings, which solves the figure-8 gasket compression sealing problem.  The cylinders only need to stand proud enough (a thousandth or so) to ensure that the cylinder head locks them to the block so they don't travel up and down with piston motion.

Cheers.

-- 

Michael Porter
Roswell, NM

---

From: Michael Porter <[email-masked]>
Date: Mon, 2 Sep 2019 21:39:54 -0600

> Oh wow, my ‘66 TR4 Motor has an aluminium head, am I doomed?  Discovered a water leak after I bought it, bad weld job on the one of channels in the block that fouled the head seal.  Filed it, fixed…

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

It's a curious situation.  The heads aren't wildly popular because of 
the price, so the number of them actually out there is pretty small, 
relatively speaking.  But, they also might be fairly rare because the 
few people that did buy them couldn't get them to seal and, thinking it 
was their fault, that there was something special about the product that 
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 
two, because I remember a message maybe a couple of decades ago, in the 
early days of the list, from someone having trouble getting one to seal 
properly.

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

Cheers.

-- 

Michael Porter
Roswell, NM

---

From: Tony Drews <[email-masked]>
Date: Mon, 2 Sep 2019 22:41:22 -0500

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There are 8 nuts for the manifolds - 4 across the top, one each at the 
front and rear of the exhaust manifold down a bit lower and a pair under 
the manifolds.

You can see the studs for 6 of them here, the rear exhaust bolt is under 
the rear bracket at the bottom.  The front exhaust bolt goes through a 
hole just above the little ear on the left of the water pump.

http://www.tonydrews.com/2007-8Rebuild/DSCN0117.JPG

I'd be nervous about the rope trick if you want to keep the liners in 
place.  I think that's better used if you're going to do a full rebuild 
so will be removing liners later.  An alternate version is a way to hold 
valves in place while they are serviced with the head on the engine though.

I've always needed to pull the rocker shaft to get to the head studs 
under the rocker shaft, but if you can remove them without pulling the 
rockers that's OK too.  I'd be happier with the rocker shaft off and the 
pushrods pulled out (be careful doing that so you don't pull out a 
tappet - although with the head off it's easy to put the tappet back).  
There are 10 head bolts / studs.

Cheers, Tony

On 9/2/2019 9:51 PM, Paul Dorsey wrote:
> Thanks for the tip. Is there a total of eight nuts holding the 
> manifolds on?  I've only removed the top 4 so far.
>
> On Mon, Sep 2, 2019 at 10:38 PM Greg Lemon <[email-masked] 
>
>     On the manifold, not much concern about loosening the liners when
>     you take the manifold off, manifold shouldn't be stuck with all
>     the nuts off, a little leverage or soft pop with a lead hammer
>     should take it right off.
>
>     Your main concern RE the liners popping loose is turning the
>     engine, pulling the head off or jockeying it around shouldn't
>     loosen them up, friction from rings on liner sliding up might.
>
>     Greg Lemon
>     TR250
>     On Mon, Sep 2, 2019, 9:25 PM Paul Dorsey <[email-masked]
>
>         Why don't more cars have wet sleeve engines?  What was the
>         weekness of this idea?
>
>         On Mon, Sep 2, 2019 at 10:19 PM Paul Dorsey
>
>             Thanks!
>
>             On Mon, Sep 2, 2019 at 9:18 PM [email-masked]
>
>                 Yes, Moss carries an aluminum head, about $3,000.  I
>                 don’t worry about any sequence for loosening, for
>                 tightening  use the sequence in the book, after
>                 tightening to 50ftlbs tighten in steps of 20ftlbs
>                 through the sequence until you get to the specified
>                 105ftlbs.
>                 Bill
>
>                 Sent from my IBM 8088
>
>                 On Sep 2, 2019, at 8:10 PM, Paul Dorsey
>
>                 Gotcha!  I may be dumb but   I I am dumb, but,I’m no
>                 dummy, I don’t have an aluminum head on my motor. Do
>                 theymake aluminum heads for our motor or do they?
>                 Anyway they’re 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.
>
>                 ** [email-masked]
>
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/[email-masked]

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    <p>There are 8 nuts for the manifolds - 4 across the top, one each
      at the front and rear of the exhaust manifold down a bit lower and
      a pair under the manifolds.</p>
    <p>You can see the studs for 6 of them here, the rear exhaust bolt
      is under the rear bracket at the bottom.  The front exhaust bolt
      goes through a hole just above the little ear on the left of the
      water pump.</p>
    <p><a href="http://www.tonydrews.com/2007-8Rebuild/DSCN0117.JPG">http://www.tonydrews.com/2007-8Rebuild/DSCN0117.JPG</a></p>
    <p>I'd be nervous about the rope trick if you want to keep the
      liners in place.  I think that's better used if you're going to do
      a full rebuild so will be removing liners later.  An alternate
      version is a way to hold valves in place while they are serviced
      with the head on the engine though.</p>
    <p>I've always needed to pull the rocker shaft to get to the head
      studs under the rocker shaft, but if you can remove them without
      pulling the rockers that's OK too.  I'd be happier with the rocker
      shaft off and the pushrods pulled out (be careful doing that so
      you don't pull out a tappet - although with the head off it's easy
      to put the tappet back).  There are 10 head bolts / studs.</p>
    <p>Cheers, Tony<br>
    </p>
    <div class="moz-cite-prefix">On 9/2/2019 9:51 PM, Paul Dorsey wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAFU8DPtNq+eJi3q-q+t7bSArwAFZzmZshVQ2DPHn5Pi=[email-masked]">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">Thanks for the tip. Is there a total of eight nuts
        holding the manifolds on?  I've only removed the top 4 so far.<br>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Mon, Sep 2, 2019 at 10:38
          PM Greg Lemon &lt;<a href="mailto:[email-masked]"
            moz-do-not-send="true">[email-masked]</a>&gt; wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div dir="auto">
            <div>On the manifold, not much concern about loosening the
              liners when you take the manifold off, manifold shouldn't
              be stuck with all the nuts off, a little leverage or soft
              pop with a lead hammer should take it right off.  </div>
            <div dir="auto"><br>
            </div>
            <div dir="auto">Your main concern RE the liners popping
              loose is turning the engine, pulling the head off or
              jockeying it around shouldn't loosen them up, friction
              from rings on liner sliding up might.</div>
            <div dir="auto"><br>
            </div>
            <div dir="auto">Greg Lemon</div>
            <div dir="auto">TR250<br>
              <div class="gmail_quote" dir="auto">
                <div dir="ltr" class="gmail_attr">On Mon, Sep 2, 2019,
                  9:25 PM Paul Dorsey &lt;<a
                    href="mailto:[email-masked]" target="_blank"
                    moz-do-not-send="true">[email-masked]</a>&gt;
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0px 0px
                  0px 0.8ex;border-left:1px solid
                  rgb(204,204,204);padding-left:1ex">
                  <div dir="ltr">Why don't more cars have wet sleeve
                    engines?  What was the weekness of this idea?</div>
                  <br>
                  <div class="gmail_quote">
                    <div dir="ltr" class="gmail_attr">On Mon, Sep 2,
                      2019 at 10:19 PM Paul Dorsey &lt;<a
                        href="mailto:[email-masked]"
                        rel="noreferrer" target="_blank"
                        moz-do-not-send="true">[email-masked]</a>&gt;
                      wrote:<br>
                    </div>
                    <blockquote class="gmail_quote" style="margin:0px
                      0px 0px 0.8ex;border-left:1px solid
                      rgb(204,204,204);padding-left:1ex">
                      <div dir="ltr">Thanks! <br>
                      </div>
                      <br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">On Mon, Sep 2,
                          2019 at 9:18 PM <a
                            href="mailto:[email-masked]"
                            rel="noreferrer" target="_blank"
                            moz-do-not-send="true">[email-masked]</a>
                          &lt;<a href="mailto:[email-masked]"
                            rel="noreferrer" target="_blank"
                            moz-do-not-send="true">[email-masked]</a>&gt;
                          wrote:<br>
                        </div>
                        <blockquote class="gmail_quote"
                          style="margin:0px 0px 0px
                          0.8ex;border-left:1px solid
                          rgb(204,204,204);padding-left:1ex">Yes, Moss
                          carries an aluminum head, about $3,000.  I
                          don’t worry about any sequence for loosening,
                          for tightening  use the sequence in the book,
                          after tightening to 50ftlbs tighten in steps
                          of 20ftlbs through the sequence until you get
                          to the specified 105ftlbs.  <br>
                          Bill<br>
                          <br>
                          Sent from my IBM 8088<br>
                          <br>
                          On Sep 2, 2019, at 8:10 PM, Paul Dorsey &lt;<a
                            href="mailto:[email-masked]"
                            rel="noreferrer" target="_blank"
                            moz-do-not-send="true">[email-masked]</a>&gt;
                          wrote:<br>
                          <br>
                          Gotcha!  I may be dumb but   I I am dumb,
                          but,I’m no dummy, I don’t have an aluminum
                          head on my motor. Do theymake aluminum heads
                          for our motor or do they? Anyway they’re out
                          of my price range.<br>
                          <br>
                            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.<br>
                          <br>
                          ** <a href="mailto:[email-masked]"
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From: Greg Lemon <[email-masked]>
Date: Mon, 2 Sep 2019 23:35:43 -0500

--===============8589544293789551406==

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So will an aluminum cross flow GT6 head fit a 2.5 liter too?  If so the
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.

Greg Lemon
TR250

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

> > Oh wow, my =E2=80=9866 TR4 Motor has an aluminium head, am I doomed?  D=
iscovered
> a water leak after I bought it, bad weld job on the one of channels in th=
e
> block that fouled the head seal.  Filed it, fixed it, remember only 70ftl=
bs
> on the studs.  ISTR the liners were not as proud of the block as some say
> they should be.
>

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<div dir=3D"auto">So will an aluminum cross flow GT6 head fit a 2.5 liter t=
oo?=C2=A0 If so the offset bonnet bulge club would like to know which side =
is intake on?<div dir=3D"auto"><br></div><div dir=3D"auto">My work on my hi=
gh flow cast iron head has kind of stalled out.=C2=A0<br><div dir=3D"auto">=
<br></div><div dir=3D"auto">Greg Lemon</div><div dir=3D"auto">TR250</div><d=
iv dir=3D"auto"><br></div></div></div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 2, 2019, 10:40 PM Michael Porte=
r &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex">On 9/2/2019 9:11 PM, <a href=3D"mail=
to:[email-masked]" target=3D"_blank" rel=3D"noreferrer">[email-masked]<=
/a> wrote:<br>
&gt; 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 o=
f channels in the block that fouled the head seal.=C2=A0 Filed it, fixed it=
, remember only 70ftlbs on the studs.=C2=A0 ISTR the liners were not as pro=
ud of the block as some say they should be.<br>
<br>
You&#39;ve probably averted problems because the liners weren&#39;t stickin=
g up <br>
to spec (especially toward the high side of the tolerance).<br>
<br>
It&#39;s a curious situation.=C2=A0 The heads aren&#39;t wildly popular bec=
ause of <br>
the price, so the number of them actually out there is pretty small, <br>
relatively speaking.=C2=A0 But, they also might be fairly rare because the =
<br>
few people that did buy them couldn&#39;t get them to seal and, thinking it=
 <br>
was their fault, that there was something special about the product that <b=
r>
they didn&#39;t understand, and went back to cast-iron heads.<br>
<br>
I knew there was at least one person on the list with one, and I think <br>
two, because I remember a message maybe a couple of decades ago, in the <br=
early days of the list, from someone having trouble getting one to seal <br=
properly.<br>
<br>
(Not against aluminum heads, at all.=C2=A0 There are advantages to them.=C2=
=A0 I <br>
just think, because of the small variability of the figure-eight gaskets <b=
r>
and the cylinder heights, that they&#39;re probably ill-suited, in the <br>
configuration they&#39;re being produced, for wet-sleeve engines.=C2=A0 I&#=
39;ve been <br>
designing, off and on, on a 4-valve OHC head for the GT6 which, now that <b=
r>
there&#39;s machinable wax available for 3D-printers, can be 3D-printed and=
 <br>
investment-cast.)<br>
<br>
<br>
Cheers.<br>
<br>
-- <br>
<br>
<br>
Michael Porter<br>
Roswell, NM<br>
<br>
<br>
Never let anyone drive you crazy when you know it&#39;s within walking dist=
ance....<br>
<br>
<br>
** <a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"nore=
ferrer">[email-masked]</a> **<br>
<br>
errer" target=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs" rel=3D"noreferr=
er noreferrer" target=3D"_blank">http://www.team.net/pipermail/triumphs</a>=
=C2=A0 <a href=3D"http://www.team.net/archive" rel=3D"noreferrer noreferrer=
" target=3D"_blank">http://www.team.net/archive</a><br>
<br>
hs/[email-masked]" rel=3D"noreferrer noreferrer" target=3D"_blank">http:/=
/autox.team.net/mailman/options/triumphs/[email-masked]</a><br>
</blockquote></div>

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From: DAVID MASSEY <[email-masked]>
Date: Tue, 3 Sep 2019 11:56:50 +0000 (UTC)

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Way cool.=C2=A0 I'll bet there's a market for it if it can be adapted to th=
e TR6.
=20
Dave=20

=20
=20
-----Original Message-----
From: Michael Porter <[email-masked]>

(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=
....

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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div><font size="3">Way cool.&nbsp; I'll bet there's a market for it if it can be adapted to the TR6.</font><br>
</div>

<div> <br>
</div>

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

<div> <br>
</div>

<div> <br>
</div>

<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Michael Porter &lt;[email-masked]&gt;<br clear="none">
<div dir="ltr"><br>
</div>

<div dir="ltr"><br>
</div>

<div dir="ltr">(Not against aluminum heads, at all.&nbsp; There are advantages to them.&nbsp; I <br clear="none">just think, because of the small variability of the figure-eight gaskets <br clear="none">and the cylinder heights, that they're probably ill-suited, in the <br clear="none">configuration they're being produced, for wet-sleeve engines.&nbsp; I've been <br clear="none">designing, off and on, on a 4-valve OHC head for the GT6 which, now that <br clear="none">there's machinable wax available for 3D-printers, can be 3D-printed and <br clear="none">investment-cast.)
<div class="yqt8260078043" id="yqtfd86005"><br clear="none"><br clear="none"><br clear="none">Cheers.<br clear="none"><br clear="none">-- <br clear="none"><br clear="none"><br clear="none">Michael Porter<br clear="none">Roswell, NM<br clear="none"><br clear="none"><br clear="none">Never let anyone drive you crazy when you know it's within walking distance....<br clear="none"><br clear="none"></div>
</div>
</div>
</div>

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