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Coating outside of engine block?
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Coating outside of engine block? This may be a dumb question. Is there any advantage to coating the outside of a block - just like you would do to headers?
See reference photos of Swaintech coating below:
See reference photos of Swaintech coating below:
TECH Junkie
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In most cases a header coating is a themal barrier. It keeps heat inside. I would think if you wanted to coat a block you would use a thermal dispersent to help get rid of the heat. Expensive process for no real gains that I know of.
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I thought that the heat is what makes the power. Isn't that why you want to keep the heat inside the headers?
For exhaust yes, you want the heat to stay inside the headers because the hotter the air the more its expanded and the quicker it moves. Inside an engine you want it to get rid of heat otherwise it will overheat.
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From: Upstate NY
Did you mean a paint with iron in it?
If you are trying to dissipate head from a block, or other parts a thin coating of flat black is probably best. The coolant is going to reject the vast majority of the heat, so just paint the block to make it look pretty.
Jon
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Did you mean a paint with iron in it?
If you are trying to dissipate head from a block, or other parts a thin coating of flat black is probably best. The coolant is going to reject the vast majority of the heat, so just paint the block to make it look pretty.
Jon
Did you mean a paint with iron in it?
If you are trying to dissipate head from a block, or other parts a thin coating of flat black is probably best. The coolant is going to reject the vast majority of the heat, so just paint the block to make it look pretty.
Jon
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On The Tree
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From: Aloha, OR
I remember reading an article in Car Craft awhile ago regarding this. They tried different colors and recorded the results. I remember they came to the conclusion that chrome was the worst and black was the best. They tested other components in addition to the block as well.
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i know right?? black absorbs light, rather than reflect it, i.e. white is the reflection of all colors, black is the absence.... i have heard black can disapate more heat, but not enough to make a difference, not even measurable... (dont know if that is true though, just something ive heard...)
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From: Upstate NY
i know right?? black absorbs light, rather than reflect it, i.e. white is the reflection of all colors, black is the absence.... i have heard black can disapate more heat, but not enough to make a difference, not even measurable... (dont know if that is true though, just something ive heard...)
Don't believe everything you hear...or read, even from me.
Look it up.
Hint: good absorbers are also good emitters.
Yeah, it is measurable, but in the case of a liquid cooled engine, the coolant removes the vast majority of the heat, as mentioned earlier.
Lots of air cooled engines have the fins black anodized (if aluminum). This isn't just for asthetics.
Jon
Last edited by Old SStroker; Jan 7, 2010 at 07:59 AM.
Physics 1, chemistry 1 & 2, Organic chemistry 1, and read it on the internet twice
FYI, a black shirt feels hot because it RELEASES energy faster than white. This is the inverse of black feeling colder in dark or cold, because it ABSORBS energy faster than white.
That's what I thought I wrote
Physics 1, chemistry 1 & 2, Organic chemistry 1, and read it on the internet twice
FYI, a black shirt feels hot because it RELEASES energy faster than white. This is the inverse of black feeling colder in dark or cold, because it ABSORBS energy faster than white.
Physics 1, chemistry 1 & 2, Organic chemistry 1, and read it on the internet twice
FYI, a black shirt feels hot because it RELEASES energy faster than white. This is the inverse of black feeling colder in dark or cold, because it ABSORBS energy faster than white.
Originally Posted by imma_stocker
Black absorbs and retains heat so a white block would disperse the heat better
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From: Upstate NY
Jon
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From: So.Cal.
http://en.wikipedia.org/wiki/Black_body
Painting it black makes it approximate a "black body radiator".
Painting it black makes it approximate a "black body radiator".
