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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 <mdporter@dfn.com> wrote:
> On 9/2/2019 7:10 PM, Paul Dorsey wrote:
> > 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 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.
>
>
> 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....
>
>
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
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>
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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'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=
<<a href=3D"mailto:mdporter@dfn.com";>mdporter@dfn.com</a>> 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>
> 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>
> have an aluminum head on my motor. Do theymake aluminum heads for our =
<br>
> motor or do they? Anyway they=E2=80=99re out of my price range.<br>
> =C2=A0 As I was loosening the bolts that hold the head on, =C2=A0I got=
to <br>
> thinking, I wonder if there is a sequence for loosening these head <br=
>
> nuts . =C2=A0 Metal bends, You know. Perhaps that is more critical for=
<br>
> something like aluminum heads.<br>
<br>
<br>
There have been attempts at making aluminum heads for the wet-sleeve <br>
engines, but they'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're duplicates of =
<br>
the original.=C2=A0 For that reason, they don't have the mechanical str=
ength <br>
of the cast-iron heads, and can'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'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'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'=
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'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's within walking dist=
ance....<br>
<br>
<br>
** <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; rel=3D"noreferr=
er" target=3D"_blank">http://www.team.net/pipermail/triumphs</a>=C2=A0 <a h=
ref=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/archive</a><br>
<br>
hs/don.hiscock@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox=
.team.net/mailman/options/triumphs/don.hiscock@gmail.com</a><br>
</blockquote></div>
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