[s-cars] To ceramic coat or not

[djdawson2 at aol.com]

I'll give you my 2 cents worth.
 
I had my header Swain coated 1 year and 2 months ago...and 36k miles ago... and only on the exterior.  It has held up fairly well, but significant sections have become bare.  With that alone in mind, I wouldn't consider coating the inside of a header or downpipe I owned.  If it doesn't last on the outside, it can't have a prayer on the inside.
 
As far as flow is concerned... there exists a good arguement in support of "surface turbulence" improving flow rather than hindering it.  However, if the DP is 3" (or more), I doubt you could ever tell the difference in power output.
 
Dave
 
-----Original Message-----
From: manuelsanchez at starpower.net
To: s-car-list at audifans.com
Sent: Fri, 6 Jan 2006 08:22:04 -0500
Subject: [s-cars] To ceramic coat or not


S-heads,

Thanks for the input so far.

I thought I had recently seem some opinions about coating the
inside of components;

1. There was a concern that as the ceramic coating flaked off
or deteriorated, that the bits would lodge in downstream
components, such as the kitties.  Do these coatings
deteriorate quickly, slowly?  How do they deteriorate? Is this
a valid concern?

2. Interior coating is not "smooth" as the uncoated metal,
presumably this would disturb the flow.  Do the benefits of
keeping the heat from the metal outweigh the diturbed gas-flow?

Look forward to your input.

-manny
95.5 UrS6 Avant 
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