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I use the Cometic 91mm gasket. I've purposely NOT taken more out of the
intake pocket since it already goes way outside the bounds of the liner
- I just took the sharp edges off to keep from getting a hot spot.
The Cometic does intrude into the combustion chamber next to the intake
valve but not by very much.
I also make sure to not relieve the liner outside the bounds of the fire
ring in the gasket so it's supported on at least one side and can pass
the heat to the liner. I don't blow head gaskets, but I also don't run
one for more than 2 seasons, normally for just one season.
Regards, Tony
On 10/24/2020 8:25 PM, Joe Boruch via Fot wrote:
> 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.Â
> 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
>
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>
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<p>I use the Cometic 91mm gasket. I've purposely NOT taken more out
of the intake pocket since it already goes way outside the bounds
of the liner - I just took the sharp edges off to keep from
getting a hot spot.</p>
<p>The Cometic does intrude into the combustion chamber next to the
intake valve but not by very much.</p>
<p>I also make sure to not relieve the liner outside the bounds of
the fire ring in the gasket so it's supported on at least one side
and can pass the heat to the liner. I don't blow head gaskets,
but I also don't run one for more than 2 seasons, normally for
just one season.<br>
</p>
<p>Regards, Tony<br>
</p>
<div class="moz-cite-prefix">On 10/24/2020 8:25 PM, Joe Boruch via
Fot wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1299630452.267111.1603589114762@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div class="yahoo-style-wrap" style="font-family:Helvetica Neue,
Helvetica, Arial, sans-serif;font-size:13px;">
<div dir="ltr" data-setdir="false">I was not receiving list
emails for a while, so I missed the conversation a few months
ago. </div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">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</div>
</div>
<br>
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