Ben,
I use solid copper gaskets on a lot of my cars with no difficulty and no
leaks. They must, however, be solid copper and annealed dead soft. If not,
they WILL leak.
The ones on my Sunbeam Tiger are .090 thick, and the only thing I did upon
installing them was to spray a coat of silver paint on them before bolting
the heads down. I use them because the pistons on the engine are another
application, and they protrude from the block slightly. No problems in 6
years of HARD running!!
Best,
Ray McCrary
"Speed is Life;
of course Luck and Altitude
are helpful, too."
----- Original Message -----
From: "lbprince" <lbprince@email.msn.com>
To: "T-Series E-mail" <mg-t@autox.team.net>
Sent: Friday, June 23, 2000 10:33 AM
Subject: Compression Reduction
> The XPEG head on my TF 1500 has been shaved too many times. With the
> static timing set at TDC, it is on the edge of pinging even when premium
> fuel is used. By interpolating the stage tuning data, the compression
ratio
> is around 9.6. Readings on a compression gauge are between 175 and 180
psi
> on all cylinders. The engine was recently overhauled. Octane boosters
seem
> to help, but they are expensive and a hassle to fiddle with.
>
> To reduce the compression ratio to 9.3, my calculations indicate that a
> .085" gasket " (compressed) should be used. The Gasket Works in
California
> makes copper gaskets that are this desired thickness. I am told, however,
> that copper gaskets tend to leak unless special precautions are taken. Is
> this true? What are the special precautions?
>
> There are other options like shaved pistons and increasing combustion
> chamber volume. Are these other choices advisable?
>
> Thanks,
>
> Ben Prince
>
>
>
>
>
|