Heat Shield Painting

[_Velocity_]

Looks good. Might consider going same colour as rocker cover.

Cheers.

[MX Dave]

Looks good. Might consider going same colour as rocker cover.

Cheers.

Ballsy

[XR6menace]

[XR6menace]

My apologies to impellor for picking on him... seems I went a bit silly yesterday afternoon, could a mod maybe delete my barrage of insulting posts towards him please ?

CHEERS

null

[Never had any say Panda]

I agree black is a bad colour for anything handling heat.. When the heat is coming from a light based heat source.. Black attracts more heat because it doesn't reflect as many light rays (yeah technically it doesn't reflect any but in gloss applications, it does reflect).

In this case black, yellow, red or blue.. The paint on the heatshield is what's gonna trap the heat.. As the heatshield would be a low heat conductivity metal so it disperses heat alot faster..

Lets dumb this down.

Put a garlic bread covered in alfoil in the oven.. It'll cook in 16 minutes.. and stay hot for 10 minutes outside the oven..

Paint the alfoil black it'll cook in 16 minutes.. and stay hot for maybe 10.25minutes outside the oven

Paint it black with an ultra thick layer of paint.. It'll cook in 16 minutes.. But it may stay hotter if you leave it wrapped in alfoil outside the oven for longer..

But if you were attempting to cook the garlic bread using mirrors and the sun.. It'd be a completely different story..

Edited 22/05/12 10:47 PM by Sharp Dressed Panda

[Paulie2256]

What if the oven had a turbo?

[Impellor]

I hate to say this but your example is incorrect. The alfoil being black would actually allow for faster thermal release.That is it would cooler quicker. This is why radiators generally are black. If the internal environment is hotter (the garlic bread), than the external environment (room temp), by being black it is able to increase thermal heat release by up to 8% quicker. This is exactly why foil is shiny, to assist heat retention. Cheers

[Never had any say Panda]

You may understand that I was also pointing out that there is frig all difference? The colour of a paint has feck all affect on heat distribution and release. Thickness and chemical composition would be the main factors..

oil is shiny to assist with heat retention? then explain why after said garlic bread is cooked.. You can open the oven, grab the shiny end of foil that is poking out and get it out of the oven without using a mitten.. If it's so shiny and hot?

Edit: If oven had turbo, cooking time would be greatly reduced.. Could cook a garlic bread in 7 minutes.. 4.3 minutes if it had E85..

EDIT II: I forgot about E85 burning cooler.. So cooking time would be increased with E85.. And you'd need 30% more fuel supply to your oven.. Turns out E85 isn't a good investment in the cooking industry..

Edited 22/05/12 11:42 PM by Sharp Dressed Panda

[XR6menace]

My oven is N/A I painted it black so it would cook my food faster than you blokes with your "Fan forced ovens" lol..

[Paulie2256]

I'm getting my oven from SA

it is black

nooooooooooooot

Edited 22/05/12 11:58 PM by Paulie2256