Ceramic coating for PPE SS headers worth it?
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Most popular color that people get them coated is black, like how PPE offers them. Also, Rafi from RR-Racing advised using thermal tape to keep the heat down. Hopefully, he can chime in on the specifics.
-Josh
-Josh
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TurboGti (05-08-19)
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The stock exhaust manifolds use a heat shield to reduce the heat that radiates up to the rest of the engine compartment. IMO, headers should be ceramic coated or wrapped to keep down the radiated heat. Color really doesn't matter, except when a company (like Jethot) uses it as a differentiator for different grades of coating.
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Additionally, reducing any radiated heat, especially on SS parts in the engine bay will benefit intake air temps among others. Then ultimately, for purely aesthetic reasons, ceramic coating the headers will keep them looking good for years to come.
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There isn't necessarily a better or best color for reducing temps, though different color / types of ceramic coatings offer higher operating temperatures. On the lower end of the spectrum traditional polished ceramic coating is good for 1000F -1100F metal temp which equates to about 1200F - 1500F EGT. This coating is VERY susceptible to temp extremes caused by too rich or too lean fuel conditions or timing issues. Therefore, polished ceramics are NOT to be used in turbo or supercharged applications in most situations.
On the other end of the coating spectrum are high temp ceramic coatings. These are usually good for temps in the 1700F - 2000F+ range and are unaffected by temp or tuning extremes. Colors are varied in the silver, black, gold, etc, ranges.
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There isn't necessarily a better or best color for reducing temps, though different color / types of ceramic coatings offer higher operating temperatures. On the lower end of the spectrum traditional polished ceramic coating is good for 1000F -1100F metal temp which equates to about 1200F - 1500F EGT. This coating is VERY susceptible to temp extremes caused by too rich or too lean fuel conditions or timing issues. Therefore, polished ceramics are NOT to be used in turbo or supercharged applications in most situations. On the other end of the coating spectrum are high temp ceramic coatings. These are usually good for temps in the 1700F - 2000F+ range and are unaffected by temp or tuning extremes. Colors are varied in the silver, black, gold, etc, ranges.
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So would it be agrees that ceramic coating means i dont need Thermal tape/ wrapping the headers?
or should i wrap to help keep temps further down even if ceramic coating?
i know its advised to wrap the starter which i will end up doing either way. but just want some clarity before i order both ceramic coating and thermal wrap from RR-Racing.
or should i wrap to help keep temps further down even if ceramic coating?
i know its advised to wrap the starter which i will end up doing either way. but just want some clarity before i order both ceramic coating and thermal wrap from RR-Racing.
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TurboGti (05-08-19)
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This is worth a read as SS only needs to contain 10.5% Chromium to qualify as SS and that leaves the other 89.5% iron/carbon mix which will corrode if salt is present and as we all know it will also rust too as it is mostly iron.
https://www.reliance-foundry.com/blo...ainless-steel/
That said for all but Arizona, if it's a DD and rain driven, where a wrap gets damp, 304 SS can rust out. I would advise against a wrap if you want them to last.
That said, would I wrap up in the engine bay? Yes. Under the car. NO!
https://www.reliance-foundry.com/blo...ainless-steel/
That said for all but Arizona, if it's a DD and rain driven, where a wrap gets damp, 304 SS can rust out. I would advise against a wrap if you want them to last.
That said, would I wrap up in the engine bay? Yes. Under the car. NO!
Last edited by 2013FSport; 05-08-19 at 04:22 PM.
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following your advice after some local sourcing. getting em locally done, with copper inside as well for a good price. I pulled the trigger on the power upgrade option by RR-Racing.
the waiting begins.