Exhaust Ceramic Coating

[trav1856]

So while I've got the head off, I've decided to improve exhaust flow, I'm going to put a gasser exhaust in its place (the 4 -> 2 -> 1 header type from a cabriolet). Would it be wise to paint them with hi-temp ceramic paint? Or would that cause problems down the road?

[R.O.R-2.0]

So while I've got the head off, I've decided to improve exhaust flow, I'm going to put a gasser exhaust in its place (the 4 -> 2 -> 1 header type from a cabriolet). Would it be wise to paint them with hi-temp ceramic paint? Or would that cause problems down the road?

the paint will more than likely just wear off..

usually ceramic coating is just ceramic, and sprayed on, both inside and outside, then baked on..

should have titled it as "ceramic header paint"...

[RadoTD]

Yeah... I would either just spray it with high temp paint and wrap it (~$60) or just go all out and get them ceramic coated (~$200-$??)

[ToddA1]

You can get ceramic coatings done pretty cheap, nowadays.  I've used a few companies and of course Jet Hot was the most expensive.

Something to insider is how often the car will be driven.  If its a weekend car, the coating likely won't last.  I've had a down pipe/manifold coating fail twice due to rust.  The parts need to be heat cycled and they'll last a long time.

I wouldn't wrap parts.  Holding the heat in will make the part fail much sooner.

-Todd

[shwak23]

You can get ceramic coatings done pretty cheap, nowadays.  I've used a few companies and of course Jet Hot was the most expensive.

Something to insider is how often the car will be driven.  If its a weekend car, the coating likely won't last.  I've had a down pipe/manifold coating fail twice due to rust.  The parts need to be heat cycled and they'll last a long time.

I wouldn't wrap parts.  Holding the heat in will make the part fail much sooner.

-Todd

Do you think there would be any benefit to wrapping my 3" downpipe on my turbo? It is stainless steel so shouldn't fail due to rust.

Sent from my DROID X2

[Helliouse]

I coated stock mani. Reasoning is the turbo uses the heat generated by the combustion event, if you can keep more of that heat in the exhaust gasses to be used in the turbo, the more boost your going to get, quicker.
So is it worth it, I think so.

The price wasn't bad, and in Alberta I used Top Gun coatings.

[ToddA1]

Do you think there would be any benefit to wrapping my 3" downpipe on my turbo? It is stainless steel so shouldn't fail due to rust.

There's definitely a benefit, but there's still a downside.  Although your d/p is stainless, lower grades of stainless will still rust.  Even if it's 304 stainless, I have a feeling that keeping the heat in will fatigue the metal, causing premature failure.  IIRC, all header manufacturers state header wrap will void the warranty.

If it were my part, I'd go with the coating.  I had one company tell me that they (nobody) could promise 100% inside coverage.  The coating is sprayed on, so it'll only reach where the spray allows.  That was a decade ago, so maybe you can find someplace that'll dip the parts in an immersion tank.  I have no clue where the technology has gone.

I notice that Eastwood now sells an internal header coating.

-Todd

[trav1856]

My main concern for asking was whether the coating would cause damage by heat retention and whether or not it would cause higher EGT's

[Helliouse]

The coating shouldn't cause damage, it is supposed to help keep the head out of the material. From what I have read and been told.