Ceramic coating inside of headers

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Mar 29, 2014 | 10:14 PM

fauxgs

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Ceramic coating inside of headers

I have a new set of stainless steel (probably 304) and wonder if coating the inside of these headers will be beneficial? Flow? Discoloration? other?

Mar 29, 2014 | 10:21 PM

1989GTA

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It probably would not hurt. I always have a thermal barrier coating applied on the mild steel headers along with the outside ceramic coating. The more heat you can keep inside the header the better.

Mar 30, 2014 | 07:45 AM

maroonls1z

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When I went to have mine coated, they told me they don't do the inside because it hurts power

Mar 30, 2014 | 10:51 AM

CCPcoatings

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Ceramic Coating Stainless Headers

Quote:

Originally Posted by fauxgs

I have a new set of stainless steel (probably 304) and wonder if coating the inside of these headers will be beneficial? Flow? Discoloration? other?

Curious, why would you want to coat the ID of the headers as opposed to OD or OD/ID?

Coating the ID will give you some thermal insulation, but the greater gain would come from doing the OD. Since your header tube is already smooth there is zero flow improvement. Thermally though, SS headers act like a huge heat sink so anything to reduce the radiated temps is a plus, i.e. coatings and or wrap.

Mar 30, 2014 | 11:20 AM

1989GTA

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"Coating the ID will give you some thermal insulation"

Exactly. That is why I do both the inside and outside. The inside coating is a different material than the outside. It looks like a piston top coating.

Mar 30, 2014 | 02:05 PM

Exidous

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Stainless does not radiate heat like mild. I see very little benefit to doing both the inside and out.

Mar 30, 2014 | 02:10 PM

427zm

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I did OD and ID on mine, and love it. The engine bay does not get very hot even in our Texas summers. It also cools down enough to touch with in minutes from being shut down. Big win over all for doing both.

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