Hi Dan:
Good to hear from you. Want to thank you again for your enthusiasm and generous
compliments about our car when you certified it at Bonneville and Muroc.
About your header coatings...All of the silver header coatings-no matter which
company
does them, Jet Hot, HPC, Poly dyne, Swain or us- Finishline Coatings- will go
away at
about 1250 degrees. Our ceramic metallic coating is certified by NASA for
turbine jet
engines just like HPC. etc.
First the coating will dull out. At 1400-1450 degrees it will start to break
up and come
off. That's because the ceramic has so much aluminum powder in it that the
extreme heat
is causing the aluminum to deteriorate.
We have developed an under base for this problem, but it is only good for
another couple
100 degrees. It will keep the coating from actually coming off, but will still
gray out.
One of the things that we try to do is educate our customers about the best
coatings for
their particular application. We are far from being the biggest company, but
we do want
to do the best quality of work period!!
For your application, we recommend our Black Satin finish.. It is the highest
thermal
barrier of any coatings available. and we have tested it at over 2200 degrees
without
failure. Remember that alcohol motors generally don't run as hot of exhaust
temp. as gas
motors. Turbo charged motors build tremendous heat in the exhaust system under
a load.
The one thing about the silver coatings is that it is a very good rust
inhibitor, so in
applications where the exhaust temp do not exceed the 1300 degree range, it is
a good
coating to use on Land Speed cars. We put a special base coat under our Black
Satin
coating and have found it to be a good rust resistant coating also.
Thanks for your inquiry, Dan. Hope to see you this June in Muroc.
Russ Meeks
Finishline Coatings
Dan Warner wrote:
> Russ,
>
> I have a question you maybe able to answer. We had our headers coated by HPC
> this year(had a gift certificate for $100). The first time we started the
> Alfa the coating burned off at the bends and tips of the collectors. EGTs
> are approx. 1450 - pipes are 16 to 18" long if I remember right.
>
> Thanks,
>
> Dan Warner
> ----- Original Message -----
> From: Finishline Coatings <lona@finishlinecoatings.com>
> To: John Beckett <landspeedracer@email.msn.com>
> Cc: <dferguso@ebmail.gdeb.com>; <bbutters@dmi.net>;
> <land-speed@autox.team.net>
> Sent: Tuesday, January 04, 2000 12:22 PM
> Subject: Re: Exhaust exits
>
> > John:
> > Did you know that the "ceramic coating" that is applied to exhaust
> pipes-if
> > applied to the inside tubing also-not only acts as a heat barrier, but is
> > known to increase scavenging of exhaust gasses.Wes Potter was mentioning
> HPC
> > coating for a turbo and heating problem the other day- and our company,
> > Finishline Coating, does the same process. Just letting everyone
> know...I'll
> > shut up now.
> > Thanks,
> > Russ Meeks
> >
> >
> >
> >
> > John Beckett wrote:
> >
> > > Wonder if you could actually design something that could create a strong
> > > scavenge, low pressure, effect to help pull the exhaust out? If pumping
> > > efforts were reduced maybe one could overcome, or surpass, the increase
> in
> > > frontal area. Would the scavenging increase the efficiency of the
> > > turbocharger as it would in a normally aspirated engine?
> > >
> > > John Beckett
> > > -----Original Message-----
> > > From: dferguso@ebmail.gdeb.com <dferguso@ebmail.gdeb.com>
> > > To: bbutters@dmi.net <bbutters@dmi.net>; land-speed@autox.team.net
> > > <land-speed@autox.team.net>
> > > Date: Tuesday, January 04, 2000 9:56 AM
> > > Subject: RE: Exhaust exits
> > >
> > > >on the up side, depending on the angle, shape, and size of the exhaust
> > > >dumps, and the speed of the car, some positive venturi effect of
> lowering
> > > >exhaust pressure may be realized
> > > >
> > > >doug @ black radon engineering
> > > >
> > > >
> >
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