Hi Simon.
If the supplier in this case is Denis Welch then he is right, the heat
shield does fit. I can send pics of the setup on my BJ8 and in a few weeks
Jim Finch's Tri-Carb can be photographed. He is in Italy for a couple of
weeks driving round the Mille Miglia course (10 days not 10 hours).
I've heard from the Hot-Rodders that taping the pipes can cause them to
crack at the welds where the flange bolts to the head. Not sure why but
I've seen it happen on a Nasty Boy.
I would recommend keeping the shield. It is a last ditch safety if fuel
should leak from the float chambers. It should go down the overflows but
you never know.
The Inlet manifold and cast exhaust are bolted together so they come off in
a lump after the carbs. The heat transfer bosses on the underside of the
inlet have to be relieved (by grinding) to allow the manifold to sit really
close to the 6-branch. Nothing too complicated and very obvious as you offer
up the inlet with exhaust in place.
I will be in Devon with the BJ8 from 26-29 May if you fancy a Noggin n
Natter - We are staying in Sidmouth.
Best..........
Alan Bromfield
http://www.nfahc.co.uk
-----Original Message-----
From: owner-healeys@autox.team.net [mailto:owner-healeys@autox.team.net] On
Behalf Of Simon Lachlan
Sent: 15 May 2006 19:17
To: healeys@autox.team.net
Subject: Tape on exhaust headers
Car is a MkII BT7 with 3 HD6s.
The sad saga of my knocking off/destroying my exhaust gets worse..I find
that the front of the two exhaust manifolds has fractured across two of the
three stud holes where the down pipe mates up to it. So, despite the
possibility of some rare and expert welding from a local blacksmith, I
realistically have to accept that the manifold has had it.
A second manifold is possible, but the money isn't good. By the time I've
bought that and had the old system repaired, I'm just as well off putting on
a 6 branch "bunch of bananas" and a new silencer etc.
So, question time:-
1)The supplier says that one can keep the old heat shield with this new set
up, which I find a bit incredible. But, he says, I just need to bend the
shield around at a couple of angles and hey presto! (like anything is ever
hey presto with these cars!!) I think I'll be doing without heat shields
myself and am wondering about heat and fuel bowls etcetc.
I've heard that tape on headers effectively forces some of the heat back
into the Head (doesn't allow the heat to dissipate) and that this can cause
problems. Is this so? Seems to me that putting tape on before the pipes are
fitted in a good, easy and practical way forward?? Except, I suppose, IF the
heat shield could remain in situ, one wouldn't have to disturb the carbs??
So.
2) can one remove the exhaust manifolds and replace with 6 branch without
removing the carbs??
3) I gather that the carbs being HD6, not HS4 will not affect the
installation of the 6 branch? Eg that it won't be even harder??
Thanks,
Simon.
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