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@gmail.com> To:
peter.svilans@rogers.com> CC: healeys@autox.team.net; linsley46@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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