[s-cars] To ceramic coat or not

[manuelsanchez at starpower.net]

Dave,

thanks. that's what I love about the list, often makes me
think counter to what I had originally thought. The turbulence
helping flow as opposed to hindering is a case in point. Seems
to make sense when I think about it in terms of what I had
heard about porting heads.

Thanks again for the info on your own ceramic coating
experience, it reinforces an opinion I'm forming. I bought a
ceramic coated header for my truck (got tired of the warping
EM and broken studs so I thought what the hell). It came
coated from the vendor, and I'm not sure who did the coating,
but after a few months large sections on the cross over pipe
flaked off.  I'm glad (but really sorry) it wasn't just me.

-manny

---- Original message ----
>Date: Fri, 06 Jan 2006 11:13:13 -0500
>From: djdawson2 at aol.com 
>Subject: Re: [s-cars] To ceramic coat or not  
>To: manuelsanchez at starpower.net, s-car-list at audifans.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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