The steel shim gasket is much thinner than the standard head gasket. Mordy at
www.headgasket.com can make a solid copper head gasket in many thicknesses. He
is a longtime TR4 racer and makes special copper gaskets for many different
industries, but started his company making gaskets for his Triumph racing
efforts.
There are other ways to decrease the compression and still use the standard
gasket. Like, opening the combustion chamber a little, or dishing the tops of
the pistons. It wouldn't take much, but knowing how many cc's are needed would
be important.
Do you know how much thicker the head gasket needs to be? Mordy might be able
to help you with this.
Dave H.
> On 07/22/2020 8:48 AM jpaynepbr@cox.net wrote:
>
>
> I'm going to be installing a Judson Supercharger on my TR3 this fall. I have
> acquired the rebuilt supercharger, manifold, carb and a specially built dizzy.
>
> I'll need some sort of thicker head gasket to lower the compression from its
> current 9.3/1 to a more suitable 8.7 (ish)/1 Anybody have any idea where to
> get it and what to use for the thicker head gasket?
>
>
> -----Original Message-----
> From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of bill beecher
> Sent: Tuesday, July 21, 2020 6:45 PM
> To: Jerry Van Vlack <jerryvv@roadrunner.com>
> Cc: triumphs@autox.team.net
> Subject: Re: [TR] Copper head gasket: Which side up?
>
> My bad, that part number is for a lower end set from BPNW.
> Bill
>
> #dontkillgrandma
>
> On Jul 21, 2020, at 6:49 PM, bill beecher <notakitcar@yahoo.com> wrote:
>
> Thank you all, smooth side up it is.
> Gasket and 87mm pistons and liners all came from TRF, Lucas p/n EC510L.
> Head and deck are stock.
>
> Tony, yes the edge on the water holes are rolled, so Iâ??ll leave them alone.
>
> Cheers,
> Bill B
>
>
> #dontkillgrandma
>
> On Jul 21, 2020, at 6:30 PM, Jerry Van Vlack <jerryvv@roadrunner.com> wrote:
>
> Adding to what Tony says, the gasket should NOT protrude into the bore.
>
> Questions:
> What is the bore? 86, 87 or 89 mm?
> Where did the gasket come from and what brand is it? What is it's Part Number?
> How much is milled off the head?
>
> I've been through this and the only thing working for me is to find an
> original AE 330 copper gasket. NOT the Repro 330 gasket. The originals are
> getting hard to find.
>
> And be certain to re-torque the head.
>
> With .070 milled off the head and 87mm liners and an original AE 330 HG I'm
> able to keep the gasket out of the combustion chamber.
>
> Your results may differ.
>
> JVV
>
> -----Original Message----- From: Tony Drews
> Sent: Tuesday, July 21, 2020 6:05 PM
> To: triumphs@autox.team.net
> Subject: Re: [TR] Copper head gasket: Which side up?
>
> Smooth side goes up.
>
> It's better if the gasket doesn't protrude, hard to do if the head has been
> milled at all.
>
> I've not messed with the water holes, no firm answer on that one. If the
> edge of those is rolled over I'd leave alone, if it exposes the composite
> part of the gasket it's OK to open up a bit.
>
> > On 7/21/2020 4:57 PM, bill beecher wrote:
> > Reassembling the TR3 motor for the old Morgan and I am dry fitting the head
> > gasket. Two questions:
> > 1. Which side goes up, smooth or the rolled over side?
> > 2. On a couple cylinders the gasket protrudes into the bore by about 1mm,
> > is this OK?
> > 3. At the front the holes in the gasket do not match exactly with the
> > water passage, is it OK to open those up just a bit? (The back aligns
> > perfectly)
> >
> > Thanks,
> > Bill B
> > TS74313E
> >
> > #dontkillgrandma
> > ** triumphs@autox.team.net **
> >
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> >
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