Thanks guys,
Since nobody reported any problems with their finish on the intake manifold,
I had mine powder coated and am happy with the looks of it - clearly a much
tougher finish than paint, and it also fills out grinding marks etc. very
nicely.
I've installed all the major components of the engine installation for the
last time before engine bay painting, and after I torqued down the intake
manifold, the V-shaped manifold for the SU carbs using a very thin gasket,
and after I cut some holes in the noise insulation blanket for the SU damper
caps, the bonnet actually closed! Quite a relief, and to celebrate I decided
the time had come to stick the V8 badge on the bonnet. The whole
installation is almost identical to the original factory set-up which is
useful from the parts availability point of view, but a second time I would
probably opt for the RV8 exhaust system to provide more clearance all round
and for better gas flow.
Whilst on the intake manifold temperature issue: the casting is very complex
with nasty sharp corners in the air flow passages, obviously great care was
taken in the design of it to pre-heat the intake air. This probably reduces
power output quite a bit. Why pre-heat the intake air? Is this to reduce
emissions or to prevent the carbs from icing up whilst crossing the Alps (or
Rockies) in early spring? I'm thinking about running ducts forward from the
carbs the get cool intake air from just behind the grille, and I'm wondering
about the consequences.
Regards,
Frank van Dalen
----- Original Message -----
From: Jim Stuart <jimbb88@erols.com>
To: Andrew B. Lundgren <lundgren@iname.com>
Cc: Frank van Dalen <frank.vandalen@fae.storkgroup.com>;
<mgb-v8@autox.team.net>; murray arundell <goforit@ecn.net.au>
Sent: Monday, June 12, 2000 11:39 PM
Subject: Re: Inlet manifold - paint or powder coat?
> HPC is a brand of high temp ceramic coating similar to Jet Hot Coating.
> Originally developed by the aerospace industry, it is used in many other
areas,
> of interest to us, exhaust system components. It reduces external
temperatures
> to the point you can almost put a bare hand on a header without losing
skin. It
> maintains the heat inside the pipes for better flow & performance- so they
all
> claim. It produces a very attractive finish, available in a range of
colors.
>
> This is not the same thing as powder coating. Powder coating is generally
more
> durable, a much harder finish, but will not stand temperatures over
350-400`.
>
> In general, you would HPC your headers & down pipes to keep the engine bay
> cooler, powder coat the intake manifold & other parts, such as suspension-
> including coil springs- to improve appearance & to protect them from rust
&
> corrosion.
>
> HPC & JET HOT are processes, not components to buy & self install. Both
> maintain web sites & advertise in auto performance magazines. You are
generally
> going to ship your parts to a processing facility.
>
> Powder coating can be a do it your self deal- see Eastwood- but most areas
have
> several shops doing this for commercial applications as well as car stuff.
>
> Jim Stuart
>
>
> Jim Stuart
>
> "Andrew B. Lundgren" wrote:
>
> > Forgive my ignorance, what is HPC coating? Where can I buy it? I have
> > an old chrome exhaust manifold that that has turned that old overheated
> > color in places and lost chrome in others. I would like to get it nice
> > and pretty again.
> >
> > Thanks!
> >
> > On Tue, 13 Jun 2000 00:04:31 +1000, murray arundell wrote:
> >
> > >use HPC coating........ good for 400C. is a polished alloy like
finsih.
> > >looks great......... you can do your headers too. a good look also.
have
> > >done my offy inlet and custom pipes and no effect on them at all.....
> > >
> > >cheers - Murray
> >
> > Andrew Lundgren
> > Lundgren@iname.com
> > http://www.itwest.net/~lundgren
>
>
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