TimZ Posted January 12, 2009 Share Posted January 12, 2009 It might sound stupid but why does the darker color coating doesnt work as good ? isnt it all the same coating but with a color ? It has to do with the way that different colors absorb or reflect infra-red energy. It's exactly the same effect that causes a black leather seat to get really hot when you set it in the sun. Colors in any object work by absorbing some wavelengths (i.e. colors) and reflecting others. On one end of the scale, black absorbs everything and reflects nothing. On the other, white absorbs nothing and reflects everything. Quote Link to comment Share on other sites More sharing options...
ZZZeee Posted January 12, 2009 Share Posted January 12, 2009 I'm not a turbo guy but holding heat "in" the turbo is bad, isn't it? Quote Link to comment Share on other sites More sharing options...
RIP260Z Posted January 12, 2009 Share Posted January 12, 2009 Thank you for your reply TimZ Quote Link to comment Share on other sites More sharing options...
JIM73240Z Posted January 12, 2009 Share Posted January 12, 2009 I'm not a turbo guy but holding heat "in" the turbo is bad, isn't it? No, its a good thing. heat = pressure = getting the turbine to spool faster. When air cools down it contracts or can slow down in tubing. We want as much hot air coming out as we can get. The hotter the better to a point. After the turbo, it can cool down, it already did the work that we needed it to do. Hope that made cense. jimbo Quote Link to comment Share on other sites More sharing options...
ZZZeee Posted January 12, 2009 Share Posted January 12, 2009 No, its a good thing. heat = pressure = getting the turbine to spool faster. When air cools down it contracts or can slow down in tubing. We want as much hot air coming out as we can get. The hotter the better to a point. After the turbo, it can cool down, it already did the work that we needed it to do. Hope that made cense. jimbo Yes, it makes sense. Thank you. Quote Link to comment Share on other sites More sharing options...
Wedge Posted January 13, 2009 Share Posted January 13, 2009 It has to do with the way that different colors absorb or reflect infra-red energy. It's exactly the same effect that causes a black leather seat to get really hot when you set it in the sun. Colors in any object work by absorbing some wavelengths (i.e. colors) and reflecting others. On one end of the scale, black absorbs everything and reflects nothing. On the other, white absorbs nothing and reflects everything. Thank you very much ! Quote Link to comment Share on other sites More sharing options...
darkzebra Posted August 7, 2009 Share Posted August 7, 2009 I intend to Jet-Hot coat my 82 280ZXT manifold. Should I do both inside and out, or outside only? Quote Link to comment Share on other sites More sharing options...
280zNHChris Posted August 8, 2009 Share Posted August 8, 2009 both, color doesn't make a difference. The chrome can't go as high because the chrome is really aluminum particles, that is why when sprayed it looks really rough and you need a special vibratory tumbler to polish it and it won't take 2000, the reason they don't give color options at that temp, they would all discolor badly, even the black can lighten to a charcoal. I have coated the inside of the housing and had no tolerance issues and it should spool slightly faster because the edge gap has been decreased (I've done a few, but they are all different, your mileage may vary.) Don't spray heavy and don't get runs on the inside. The general idea has been said, ceramic keeps the heat in and flowing out verses radiating out to other parts and helping clear the exhaust chamber at high rpms. Jet-Hot is a company name they do ceramic coating and use the same as everyone else. There's only 2 places in the US that make the ceramic and both lines are almost identical. Let me know what they quote you. 8) Quote Link to comment Share on other sites More sharing options...
darkzebra Posted August 10, 2009 Share Posted August 10, 2009 Will let you know when I get the quote Quote Link to comment Share on other sites More sharing options...
280zNHChris Posted August 11, 2009 Share Posted August 11, 2009 To give some an idea of what used headers look like after coating. I just did a set of square port Z headers for a project I'm working on. They were on E-Bay USED and I blasted them down smooth and coated them inside and out with 2000 degree Black Velvet ceramic. I finally remembered to get a before and after. The collectors get very hot so that is important especially on a 6 into 1 or a 3 -2. Before: After: Quote Link to comment Share on other sites More sharing options...
280zNHChris Posted August 11, 2009 Share Posted August 11, 2009 I couldn't find a good pic yet of a hotside turbo I did but this one is ok, it's also 2000 degree ceramic. Quote Link to comment Share on other sites More sharing options...
280zNHChris Posted August 11, 2009 Share Posted August 11, 2009 Here's a better example of the hotside. Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted August 11, 2009 Share Posted August 11, 2009 I wanted to help clarify on the color heat/absorption comments. Emissivity is the benefit of shiny coatings. Flat or shiny a color does not affect heat transmission, only the ceramic. The color aids in reflecting and associated absorption. A color does not make it radiate more, only absorb more. Quote Link to comment Share on other sites More sharing options...
Wedge Posted August 11, 2009 Share Posted August 11, 2009 How did you do that coating at a shop or at home ? Quote Link to comment Share on other sites More sharing options...
280zNHChris Posted August 11, 2009 Share Posted August 11, 2009 At my shop, the smell would drop you to the floor. Quote Link to comment Share on other sites More sharing options...
NavyCuda Posted August 11, 2009 Share Posted August 11, 2009 I had the inside and outside of my exhaust manifold, turbine housing and downpipe coated in flat black. I had no clearance or fitment issues with the inside of my turbine housing coated. Though this is on a 5.9L cummins turbo diesel Quote Link to comment Share on other sites More sharing options...
darkzebra Posted September 1, 2009 Share Posted September 1, 2009 Have not been able to get a quote from them. I tried both an on-line request at jet-hot.com, and telephone call to a local authorized dealer. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted September 1, 2009 Share Posted September 1, 2009 Have not been able to get a quote from them. I tried both an on-line request at jet-hot.com, and telephone call to a local authorized dealer. Meh, just ship it to them. It's worth it. Quote Link to comment Share on other sites More sharing options...
darkzebra Posted September 7, 2009 Share Posted September 7, 2009 I am sure. But when your only paycheck is now from the unemployment people you have to spend more wisely (especially with a wife around!) Quote Link to comment Share on other sites More sharing options...
letitsnow Posted September 9, 2009 Share Posted September 9, 2009 Swain Tech is in NY and they do excellent work, it might save you a decent amount on shipping. Quote Link to comment Share on other sites More sharing options...
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