I stand corrected. Taking a quick, cursory look at the TRF catalog, the
heat shield (to which I referred) can be found on page 12 "fitted to all
models after FM70001) which I believe would be around '77 or '78.
I do not, however, know when the heat shield was incorporated on non North
American cars.
Regards,
Ed Hamilton
----- Original Message -----
From: Mitchell, Douglas (D.B.) <dmitchel@ford.com>
To: 'Edward Hamilton' <hamilton@ptd.net>; Mike Perry <mikep@michindust.com>;
<spitfires@autox.team.net>
Sent: Tuesday, September 21, 1999 10:07 AM
Subject: RE: heat troubles?
>
>
> -----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
>
>
|