[Shotimes] duplicolor spray painting the car

[Paul Nimz]

I just sent them as they were.  The best finish is a smooth one though.  The Y
pipe came back looking like it was chromed.  The rougher surface intake and
exhaust manifolds are a bit duller put this may be to them not being as well
polished also.  It appears the Jet-Hot Sterling 2000 when sprayed on is very
dull and almost black.  So they must polish it to that shine.

The point of doing inside and out is to prevent the heat from getting to the
metal internally.  But any part, no matter what it is made of or insulated by,
if left at any constant temperature condition will end up equalized in
temperature. The intake is a gamble as I don't really know.  I tried to get
them to do the bolts too but they declined.  A thin phenolic lower gasket
would be nice now.

The intake stays cool when the car is running anyway.  Insulating the intake
will be more effective as the cool incoming air will further keep the temps
down or at least the interior surface temps of the intake.  What the lower
intake temps will be will be a good indication of the effectiveness.  I could
insert a temp probe into the lower intake air stream though easily, just an
inch or so above #8 intake valves.

It is situations like the drags at Indy this convention where heat kills the
V8.  Hopefully by getting a lot more exhaust heat out of the engine
compartment it will considerably reduce the under hood temps and improve
engine cooling too.  I did put the rear heat shield on.  The front I'll leave
off for now.  At Putman Park my exhaust manifold temps were ~450F at the point
I measured when the session was done.  And the 500F aluminum paint on the
shield was starting to bubble up.

Or so I suppose...

Paul




On 10/15/2005 11:04:30 AM, Ian Fisher (dataflash@yahoo.com) wrote:
> Paul,
>
> Which is more durable, PC or jet-hot?
>
> I thought about Jet hot coating the intake as well.
> However, someone suggested that it may retain heat
> which would be bad.
> I'm curious to see what you find
> out. Jet-Hot does offer it as a service so I'm
> not
> sure what to think. Please let us know!
>
> I
> can't wait to get my manifolds back. The pictures of
> your V8 manifolds on the forum look good. Did you
> clean up casting marks first? Are you going to install
> them with heatshields or without?
>
> Ian
>
> --- Paul Nimz <pnimz@v8sho.com> wrote:
>
> > Is this after the paint is dried?
> >
> > Most of my intake is now Jet-Hot coated so the
> > aluminum paint is a good match
> > just a flatter finish.  Good contrast.  My other
> > intake is powdercoated.
> > Absolutely the most durable finish.
> >
> > Paul
> >
> >
> > On 10/15/2005 10:49:29 AM, Kenneth Epperly
> > (epperly1@optonline.net) wrote:
> > > 350 deg for 1 or 1.5 hours, I forget on the time.
> > I used the oven on some
> > > of
> > > the 455 STAGE 2 engines parts, will stink a
> > litt