Black absorbs heat, right?

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nidyanazo

Banned

Mar 30, 2005

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805 dawg

Jul 4, 2005

#1

• Jul 4, 2005

• #1

So it's a good idea (well, not cosmetically maybe) to paint the underside of the hood black, after removing the heat insulation. Ah, well that's what I did, and with only a 180* thermo and the rest of the cooling system being stock, my sunpro water temp gauge reads 182-184* at all times, stop and go traffic etc.... Not really sure why I'm starting this thread....Has anyone else painted the underside of the hood? What color? Cosmetic or what? The Black seems to help, now the hood actually gets warm.....hmmm....

 

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NUTCASE

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Mar 31, 2005

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Jul 4, 2005

#2

• Jul 4, 2005

• #2

I dunno about the theory that you are trying to get to but I wouldn't do it becouse heating up the hood more will make the paint on top of it fade faster

 

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TheUser

Active Member

Jul 25, 2003

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Springfield, MO

Jul 4, 2005

#3

• Jul 4, 2005

• #3

I think the idea is that black doesn't reflect light back, thus absorbing light, which brings heat with it. I don't think black paint would help absorb heat from your engine bay. Nice try though

 

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NUTCASE

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Mar 31, 2005

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Jul 4, 2005

#4

• Jul 4, 2005

• #4

ok, gopt the gears turning, I retract my last statement.

colors obsorb and reflect heat via light. when you hood is closed there is no light on the underside, nod does your motor emit any light. even if it did emit light, your motor would produce way more light than your paint could ever obsorb.

in other words, the theory will not work. the only temp changes you experience will be related to the insulation effects of the paint itself and not the color

 

88stangmangt

Active Member

Nov 25, 2003

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Stafford,VA

Jul 4, 2005

#5

• Jul 4, 2005

• #5

TheUser said:

I think the idea is that black doesn't reflect light back, thus absorbing light, which brings heat with it. I don't think black paint would help absorb heat from your engine bay. Nice try though

Click to expand...

beat me to it.

 

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Daggar

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Jul 19, 2004

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Jul 4, 2005

#6

• Jul 4, 2005

• #6

Here's an idea... paint the underside of the hood all the colors of the rainbow and let us know which band is the hottest.

 

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nidyanazo

Banned

Mar 30, 2005

149

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805 dawg

Jul 4, 2005

#7

• Jul 4, 2005

• #7

Oh, see I didn't know the light/heat relationship. Heat is cheating on light.

 

Blk91stang

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Jan 3, 2003

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North Brunswick, NJ

Jul 5, 2005

#8

• Jul 5, 2005

• #8

thermal and infared heat are 2 totally different things

 

Curse

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Apr 8, 2004

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El Paso, TX

Jul 5, 2005

#9

• Jul 5, 2005

• #9

Daggar said:

Here's an idea... paint the underside of the hood all the colors of the rainbow and let us know which band is the hottest.

Click to expand...

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,231

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Massachusetts

Jul 5, 2005

#10

• Jul 5, 2005

• #10

My entire car is black. Let me tell you it gets hot in the sun

No paint fade though