[Healeys] BN 7 MkII heat shield/ Jet Hot the Headers?

[Bob Haskell]

Richard,

Agree with what you've said; just wanted to point out that there is an 
insulating gasket/shim between the intake and exhaust manifolds.

Bob
62 BT7

richard mayor wrote:
> Jet Hot what? Are you talking about headers?  Or, stock cast-iron exhaust
> manifolds?  The stock set-up has an aluminum intake manifold directly bolted
> up to the VERY HOT iron exhaust manifold. What were they thinking? Did they
> forget that the exhaust heat will go directly from the aluminum intake
> manifold right into the aluminum carburetor? Why is anyone surprised that fuel
> boiling over in the back carb, or, any carb for that matter, was not
> anticipated?  Aluminum transfers heat faster than stink. My suggestion is (1)
> modify the connection between the cast-iron exhaust manifold and the aluminum
> intake manifold (because no one drives their Healey in the middle of winter
> and needs that extra heat), or (2) replace the exhaust manifold with a set of
> tubular headers. Then, in either case, ceramic coat (Jet Hot is a brand name)
> the exhaust manifold / or / header because it will retain more heat within and
> reduce the under carb/bonnet temperature. Cooler carbs/fuel make more power
> and eliminate many unnecessary problems.    Richard Mayor
>> Date: Tue, 13 Jan 2009 10:39:06 +0800> From: healey.nut at gmail.com> To:
> peter.svilans at rogers.com> CC: healeys at autox.team.net; linsley46 at gmail.com>
> Subject: Re: [Healeys] BN 7 MkII heat shield> > If you jet hot the headers, it
> will help immeasurably with boiling over on> the carbs.> > Alan> > '52 A90>
> '53 BN1> '64 BJ8> >
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