-----Original Message-----
From: Edward Hamilton [mailto:hamilton@ptd.net]
Sent: Tuesday, September 21, 1999 9:38 AM
To: Mike Perry; spitfires@autox.team.net
Subject: Re: heat troubles?
Mike,
The original (NA) spit came with a heat shield about one foot square. It is
an aluminum piece with a fiber type material bolted to it. It does, as the
name implies, and keeps the manifold heat away from the carb. When
converting to the dual HS4's, the original heat shield will not bolt up to
the manifold -- and if it did, the size would not be correct anyway. The
proper shield for twin carbs (standard for non-NA) cars must be used. Its
narrower and longer and shields both carbs from the manifold heat. It bolts
up between the head and manifold. I got mine in the UK, kind-of like a
sandwich of thin aluminum with a fiber type material in the middle.
I don't know if I'd feel comfortable running without the shield in place --
when stopped, without any air circulation, the bowls are probably getting
pretty hot.
Regards,
Ed Hamilton
This is not entirely true. I believe that it was only the later cars
equipped with Catalytic converters that had this heat shield. Or at
least only the cars that were built after the advent of the cats. I know
that my '73 does not now nor has it ever had a heat shield. I have thought
about fabricating one, especially when I used to autocross the car. I had
serious problems with fuel percolation.
Cheers,
Doug Mitchell
mailto:dmitchel@ismi.net
mailto:dmitchel@ford.com
'73 Spitfire 1500
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