Another powder coat question, S & J pipes Options

[Doug Leggins]

Has anyone powder coated the heat duct "S" and "J" tubes? How hot do they get?

The folks at indy powder coating said that the powder coating is good up to about 325 degrees. I am thinking that the parts do not get that hot but really do not know. If the temp gets higher than 325 then the parts should be ceramic coated.

Any experience with coating these parts? Will the powder coating hold up to the heat that these parts experience?

I have SS elbows that attach to the heat exchangers so I'm not going to coat the elbows.

[maf914]

Many years ago I converted my 76 exhaust to the 74 style with SS heat exchangers. I cleaned and sanded the "S" and "J" tubes and other associated sheet metal pieces and sprayed them with Krylon satin black (cheap 914 owner! (IMG:style_emoticons/default/laugh.gif) ). Except for inevitable scratches they are fine today.

I say this because if rattle can paint can withstand the heat, I would think powder coating could as well. Or is Krylon satin black better than we think? (IMG:style_emoticons/default/laugh.gif)

BTW, people have posted concerning their powder coated engine tin, and several have shown the pieces, including the air guides that bolt up next to the exhaust pipes. I don't know how well these last, but I heven't seen anyone post not to do this.

BTW, this leads to another question. Because powder coatings cure at 400 degrees, does this mean the coating will melt at that temperature? Obviously its not like water that will freeze or melt at 32 degrees. But what sort of reaction occurs at 400 degrees and is it reversible? Just wondering.