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Cometic will do a custom gasket for a minimal one time charge. I've had a
Spitfire gasket made thick to make up for an over zealous block milling and
another one with a wider piston opening. Once they make the design changes,
they send you a PDF with the dimensions listed for your approval. When it's
OK, they assign a part number and CNC it out. Design turn around is about a
week and another week to make it. After the first one is made, just call up
and order replacements with your customer number, no extra charges.
mike h
On Sun, Oct 25, 2020 at 8:41 AM Jerry Van Vlack via Fot <fot@autox.team.net=
>
wrote:
> Joe, my experience is only with a hot street engine but worth expressing.
> 87mm pistons and liners, .090 milled from head and Kastner D cam.
> I ran a stock AE330 for almost 40 years with no issues then I did a valve
> job and hardened EX seats because of recession in #4 EX valve seat. The
> shop took another approx. .010 off the head (so now approx. .100 off the
> head) . I used the Cometic 91mm gasket and it burned through at #4 in 2
> years of street driving. Maybe 15,000 miles.
> The engine was tired by this time having been rebuilt in the 80=E2=80=99s=
. I
> rebuilt the engine and decided to use another AE330 with a new head at .0=
70
> milled. That gasket leaked because of my dumb mistake not re-torqueing
> after a few heat cycles. Replaced with another AE330 and now have approx.
> 10,000 miles with no issues. I did re-torque a couple of times.
>
> Original AE330 copper gaskets are getting hard to find but occasionally
> show up on EBay, I just bought one. The =E2=80=9Cnew=E2=80=9D repro AE 33=
0 copper gaskets
> are not the same especially in the valve pocket area, I=E2=80=99ve compar=
ed them.
>
> My point in al of this is take a look at how an original AE330 fits to
> your head and block and give it consideration, you might find it
> acceptable. Or continue to use the steel with thin copper wire that you=
=E2=80=99ve
> used. I am not a fan of the Cometic but admittedly mine was used on a
> street engine with no plans to change it every year. Tony=E2=80=99s exper=
ience is
> worthy of attention, he hammers that engine pretty hard.
>
> JVV
>
> *From:* Joe Boruch via Fot
> *Sent:* Saturday, October 24, 2020 9:25 PM
> *To:* FOT List
> *Subject:* [Fot] Best head gasket revisited
>
> I was not receiving list emails for a while, so I missed the conversation
> a few months ago.
>
> For those of you using the composite or even Cometic gaskets, have you
> done much relieving around the intake valves? I have not found any such
> gasket that would not protrude out into the combustion chamber. I even
> bought one from BPNW that was good for up to 92mm bore, but it still
> protruded. I have been using steel shim head gaskets with copper wire
> o-rings in the fire rings, but would like a simpler set up. I have held
> off on putting my TR3 engine back together for years (while playing with
> S2000s and Miatas) waiting for a better head gasket. Joe B
>
> ------------------------------
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
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>
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>
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<div dir=3D"ltr">Cometic will do a custom gasket for a minimal=C2=A0one tim=
e charge. I've had a Spitfire gasket made thick to make up for an over =
zealous=C2=A0block milling and another one with a wider piston opening. Onc=
e they make the design changes, they send you a PDF with the dimensions lis=
ted for your approval. When it's OK, they assign=C2=A0a part number and=
CNC it out. Design turn around is about a week and another week to make it=
. After the first one is made, just call up and order replacements with you=
r customer number, no extra charges.<div><br></div><div>mike h</div></div><=
br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun,=
Oct 25, 2020 at 8:41 AM Jerry Van Vlack via Fot <<a href=3D"mailto:fot@=
autox.team.net">fot@autox.team.net</a>> 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">
<div dir=3D"ltr">
<div dir=3D"ltr">
<div style=3D"font-size:12pt;font-family:Calibri;color:rgb(0,0,0)">
<div>Joe, my experience is only with a hot street engine but worth expressi=
ng.=20
87mm pistons and liners, .090 milled from head and Kastner D cam.</div>
<div>I ran a stock AE330 for almost 40 years with no issues then I did a va=
lve=20
job and hardened EX seats because of recession in #4 EX valve seat. The sho=
p=20
took another approx. .010 off the head (so now approx. .100 off the head) .=
I=20
used the Cometic 91mm gasket and it burned through at #4 in 2 years of stre=
et=20
driving. Maybe 15,000 miles.</div>
<div>The engine was tired by this time having been rebuilt in the 80=E2=80=
=99s. I=20
rebuilt the engine and decided to use another AE330 with a new head at .070=
=20
milled. That gasket leaked because of my dumb mistake not re-torqueing afte=
r a=20
few heat cycles. Replaced with another AE330 and now have approx. 10,000 mi=
les=20
with no issues. I did re-torque a couple of times.</div>
<div>=C2=A0</div>
<div>Original AE330 copper gaskets are getting hard to find but occasionall=
y=20
show up on EBay, I just bought one. The =E2=80=9Cnew=E2=80=9D repro AE 330 =
copper gaskets are=20
not the same especially in the valve pocket area, I=E2=80=99ve compared the=
m.</div>
<div>=C2=A0</div>
<div>My point in al of this is take a look at how an original AE330 fits to=
your=20
head and block and give it consideration, you might find it acceptable. Or=
=20
continue to use the steel with thin copper wire that you=E2=80=99ve used. I=
am not a fan=20
of the Cometic but admittedly mine was used on a street engine with no plan=
s to=20
change it every year. Tony=E2=80=99s experience is worthy of attention, he =
hammers that=20
engine pretty hard.</div>
<div>=C2=A0</div>
<div>JVV</div>
<div style=3D"font-size:small;text-decoration:none;font-family:Calibri;font=
-weight:normal;color:rgb(0,0,0);font-style:normal;display:inline">
<div style=3D"font:10pt tahoma">
<div>=C2=A0</div>
<div style=3D"background:rgb(245,245,245)">
<div><b>From:</b> <a title=3D"fot@autox.team.net">Joe=20
Boruch via Fot</a> </div>
<div><b>Sent:</b> Saturday, October 24, 2020 9:25 PM</div>
<div><b>To:</b> <a title=3D"fot@autox.team.net">FOT List</a> </div>
<div><b>Subject:</b> [Fot] Best head gasket revisited</div></div></div>
<div>=C2=A0</div></div>
<div style=3D"font-size:small;text-decoration:none;font-family:Calibri;font=
-weight:normal;color:rgb(0,0,0);font-style:normal;display:inline">
<div style=3D"font-size:13px;font-family:"helvetica neue",helveti=
ca,arial,sans-serif">
<div dir=3D"ltr">I was not receiving list emails for a while, so=20
I missed the conversation a few months ago. </div>
<div dir=3D"ltr">=C2=A0</div>
<div dir=3D"ltr">For those of you using the composite or even=20
Cometic gaskets, have you done much relieving around the intake valves?=C2=
=A0 I=20
have not found any such gasket that would not protrude out into the combust=
ion=20
chamber.=C2=A0 I even bought one from BPNW that was good for up to 92mm bor=
e,=20
but it still protruded.=C2=A0 I have been using steel shim head gaskets wit=
h=20
copper wire o-rings in the fire rings, but would like a simpler set up.=C2=
=A0 I=20
have held off on putting my TR3 engine back together for years (while playi=
ng=20
with S2000s and Miatas) waiting for a better head gasket.=C2=A0 Joe=20
B</div></div>
<p>
</p><hr>
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</blockquote></div>
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