Does anyone know what temps a cast exh
mani actually reaches, other than "glowing red"?
😂
I have a header/mani coating that goes inside the runners, but don't want to exceed the recommended temp and have it flake off, or something crazy.

Is 1200-1400°F reasonable? The coating is good to 1800°F and the more heat = better the cure.

 

Tuning a turbo car 1600 degrees is nominal your going to exceed that 1800 periodically

 

With sustained use, the manifold will reach near EGT. Which is 1500-1800 depending on fuel and how the car is tuned.

 

doesn't bouncing off the two step get stupid hot too? Only relevant if you use that feature I guess. I know its pretty brief but the coating would take the brunt of that. I have no idea if this is a problem or not just kinda throwing it out there.

 

No two step here and I only track with e85, but have no clue what kind of exhaust temps I'd getting other than "less than pump gas".

 

OEM hotside and manifold will easily reach 1600f+

 

Seems that if I were to exceed 1800°F, I'd have more important things to worry about?
😂

 

Yep. Regular driving I think it will be around 1400-1500 depending on tune. When I track it I see 1600+ on 92 as others have noted. It does glow and over time I have noticed the coating that BR used on their coated exhaust manifold has started to flake. Can't hate on that though since it's gotta be a 10+ year old piece......

 

I coated the exterior, as a test. We'll see!

 

The cast iron parts are kinda moot to "coat" because they will flake/chunk eventually. By flaking on the inside that would throw it into the turbo which isn't good. Coated SS parts kinda turn colors but don't flake really, it's more of a fine dust. In the end all coats will fail. The only thing that really works as a temp barrier is wrap and even that eventually disintegrates but knowing that it's easy enough to replace every year.

 

The turbo doesn't care about flakes of ceramic coating going through the turbine/hot side. Not gonna hurt anything. Not like it's a chunk of piston or valve

 

The coating is weird. It's like a fine, metallic coating. Kinda cool.
Everything is currently assembled and hand tight. Tempting to try.
I'll see how it holds up on the outside and go from.there.

 

It might care about Swain white lightning chunks. That's what I have on my exhaust manifold, exterior only for that reason. It started flaking within 1 year of tracking the car. But once the pretty white surface layer flaked off, the rest of the graying part of the coating has been very durable and long lasting.

 

That stuff maybe. But that's not a typical ceramic coating that's only a few thou thick.

 

Just get ATP inconel shielding, done.