 Another powder coat question, S & J pipes |
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| Doug Leggins |
 Sep 10 2004, 01:12 PM
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Senior Member  Group: Benefactors Posts: 1,358 Joined: 6-February 03 From: Nashville, Indiana Member No.: 261 Region Association: None 
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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. |
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| seanery |
Sep 10 2004, 01:15 PM
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
Doug you could get them hi-temp coated ie..JetHot
powdercoating is heated to 400 degrees in the melting/curing(?) process, so get close to that temp and it may start to fail/melt/get runny. -sean |
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| maf914 |
Sep 10 2004, 01:46 PM
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None 
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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. |
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| Mueller |
Sep 10 2004, 01:46 PM
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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| Engman |
Sep 10 2004, 02:43 PM
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Zoisite Group: Benefactors Posts: 1,349 Joined: 25-March 03 From: New Albany, IN Member No.: 475 |
You can powder coat these and they will be ok. Be warned though - you will have a bitch of a time getting them back together. These pieces are a tight fit as it is and powdercaoting will add .004"and up. I have seen parts get as much as .010".
I speak from experiece. Contact me offline and maybe I can help you with some ecaoting. Thats what I did to mine and they have been fine. Ecoating adds .0008" to the part and is very consistant. M |
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