Bailey. Posted October 20, 2010 Share Posted October 20, 2010 i have a greddy intercooler kit, all the pipework is not polished so wont be a problem to paint, but the actual intercooler is polished, how would i prep this for paint. reason being im painting the compressor housing rocker covers and inlet manifold in matt black hight temp paint, and the charge pipework is going a matt grey. also would i have any issue with heat when painting the core? Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 Hammerite? Maybe? Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 20, 2010 Author Share Posted October 20, 2010 I don't want it peeling, that's what I'm concerned about?? Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 I don't want it peeling, that's what I'm concerned about?? Hammerites pretty strong stuff, and withstands heat upto.... (check as I'm unsure) 300*c? As long as your good with either brush or rattlecan I'm sure you'll be ok? Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 By the way I did my stock alloys in "satin black hammerite" and it looked good till I curbed them Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 20, 2010 Author Share Posted October 20, 2010 As I said it's just making the paint take to the polished Ali!!! Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 As I said it's just making the paint take to the polished Ali!!! Zinc primer? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted October 20, 2010 Share Posted October 20, 2010 Buy a black intercooler? Quote Link to comment Share on other sites More sharing options...
nevins Posted October 20, 2010 Share Posted October 20, 2010 etch primer Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 etch primer Any good? May use this on my alloy refurb. Quote Link to comment Share on other sites More sharing options...
Wez Posted October 20, 2010 Share Posted October 20, 2010 Will painting it affect it's ability to cool? Quote Link to comment Share on other sites More sharing options...
nevins Posted October 20, 2010 Share Posted October 20, 2010 I have always used acid 8 etch primer, perfect for ally galvanised steal grp and so on, and easy to paint over. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted October 20, 2010 Share Posted October 20, 2010 Will painting it affect it's ability to cool? to an extent at least, i'd certainly avoid getting paint anywhere near the fins. End tanks should be OK though. Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 Will painting it affect it's ability to cool? I believe so, as the intercooler uses air to air it needs to be "fed" via the Tubes but I think (theoretically) the vent will be slightly smaller due to the paint covering a mm or 2. So hence giving less gap for the air to enter... So will affect slightly. (theory) Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 I have always used acid 8 etch primer, perfect for ally galvanised steal grp and so on, and easy to paint over. thanks, easy to use? Same as regular perimer? Quote Link to comment Share on other sites More sharing options...
nevins Posted October 20, 2010 Share Posted October 20, 2010 If its a dark looking cooler you want, fit black mesh in front of it, that way it tones it down and offers protection to a certain point. Quote Link to comment Share on other sites More sharing options...
nevins Posted October 20, 2010 Share Posted October 20, 2010 thanks, easy to use? Same as regular perimer? Yeah the same, make sure the surface is clean and dry, and spray it on, you can get it in aerosol or in 1k form. Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 Yeah the same, make sure the surface is clean and dry, and spray it on, you can get it in aerosol or in 1k form. Yeah I've seen it in the halfrauds rattlecan section but didn't know about it so opted for zinc primer. But cheers, will def give it a go next time Quote Link to comment Share on other sites More sharing options...
nevins Posted October 20, 2010 Share Posted October 20, 2010 Tbh its the only product I will prime alloy with fella. Never fails me. Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 Tbh its the only product I will prime alloy with fella. Never fails me. Yep will bare that in mind. I used zinc primer but originally wasn't even going to prime as hammerite doesn't need primer. But juuuuust incase ima redo with the etch primer. Cheers for that Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 20, 2010 Author Share Posted October 20, 2010 If its a dark looking cooler you want, fit black mesh in front of it, that way it tones it down and offers protection to a certain point. tbh i really dont like mesh or grills at all, i think i will give the end tanks a couple of coats and then just a very very fine blow over of the core!very fine! etch seems the way forward! Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 Back to topic: "paint is cheap and easy to do, but it's a coating and may inhibit heat transfer, even using a heat transfer paint is debatable ... anodizing is simply an oxide dye so the intercooler still functions the same as unfinshed aluminum" But... "I think someone is wrong here. A basic rule for heat transfer in materials is that it relates to electrical transfer. This isn't 100% true all the time but mostly. Anodizing will not transfer electrical current. True it is very thin but if you ground your battery to an anodized surface your car will not start. Paint on the other hand will work to help remove heat. That is why radiators are not natural but painted a flat black. That is why the SR-71 is painted black. Kelly Johnson did not want to do it because it was extra weight. He could have anodized it with no weight penalty. They took about 80f (I think) off of the surface with this trick. Of course they are talking about 900f to start with. BTW that temp increase is due to pressure. So you see there is no way to get around compression producing heat. Even at 100% efficiency. On top of that they are working with air temps starting at minus 70f" Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 (edited) Posted twice, didn't know how to delete.... So I'll edit into a Edited October 20, 2010 by Kalel (see edit history) Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 20, 2010 Author Share Posted October 20, 2010 Back to topic: "paint is cheap and easy to do, but it's a coating and may inhibit heat transfer, even using a heat transfer paint is debatable ... anodizing is simply an oxide dye so the intercooler still functions the same as unfinshed aluminum" But... "I think someone is wrong here. A basic rule for heat transfer in materials is that it relates to electrical transfer. This isn't 100% true all the time but mostly. Anodizing will not transfer electrical current. True it is very thin but if you ground your battery to an anodized surface your car will not start. Paint on the other hand will work to help remove heat. That is why radiators are not natural but painted a flat black. That is why the SR-71 is painted black. Kelly Johnson did not want to do it because it was extra weight. He could have anodized it with no weight penalty. They took about 80f (I think) off of the surface with this trick. Of course they are talking about 900f to start with. BTW that temp increase is due to pressure. So you see there is no way to get around compression producing heat. Even at 100% efficiency. On top of that they are working with air temps starting at minus 70f" sorry, are u saying painting,,,,, may make it cooler???? to a degree....:D couldnt help myself!!! Quote Link to comment Share on other sites More sharing options...
Kalel Posted October 20, 2010 Share Posted October 20, 2010 sorry, are u saying painting,,,,, may make it cooler???? to a degree....:D couldnt help myself!!! Lol I'm just posting stuff from google dude. Lol search button is our friend but damn it confuses me Quote Link to comment Share on other sites More sharing options...
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