intercooler paint - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

rushamc · 27th August 2008, 03:33 PM

i am looking to paint /spray my fronjt intercooler with either nismo or something similar. does any one have any idea whats the best way of doing this and if anyone has any pics if they have done anything similar. i just want an idea what it would look like and dont wanna screw things up and have it looking shite.

cheers

amar

Light-R · 27th August 2008, 04:50 PM

dont really know the point mate.

i maybe wrong, but dont black paint absorb heat. and thats not the opposite function of the IC?

freakazoid3 · 27th August 2008, 05:32 PM

Quote:

Originally Posted by Light-R

dont really know the point mate.

i maybe wrong, but dont black paint absorb heat. and thats not the opposite function of the IC?

They come black as standard on an R32, so don't think it could hurt to paint it black...

M SKinner · 27th August 2008, 07:38 PM

Black will actually radiate heat faster than any other colour BUT an IC works primarily by conducting the heat into the airsteam and not by radiating it so an additional coating just means that the heat has to work its way through another layer before coming into contact with air. The effect isnt all that great though as the paint layer is pretty thin.

Tbh id just use something like the "high temperature" manifold paint you can get in halfords etc. Its overkill for an intercooler but doesnt require a primer layer and goes on in nice thin coats with a satin black finish

Light-R · 27th August 2008, 09:05 PM

correct me if i am wrong.

air impact of air on the ic will lower its temperature which in sequence will lower the temperature of the passing air inside the ic.

black absorbs all of the light components while the white reflects them.

so if the ic is painted black will tend to heat a bit more (much like white cars vs. black cars) what will cause the diminuishing of its cooling capabilities.

but i could be wrong

M SKinner · 27th August 2008, 09:11 PM

Have a read:

Black Body Radiation

"In fact, we can be much more precise: a body emits radiation at a given temperature and frequency exactly as well as it absorbs the same radiation. This was proved by Kirchhoff: the essential point is that if we suppose a particular body can absorb better than it emits, then in a room full of objects all at the same temperature, it will absorb radiation from the other bodies better than it radiates energy back to them. This means it will get hotter, and the rest of the room will grow colder, contradicting the second law of thermodynamics. (We could use such a body to construct a heat engine extracting work as the room grows colder and colder!)"

But radiation isnt really a major factor on an IC

Smokey 1 · 27th August 2008, 09:20 PM

Quote:

Originally Posted by Light-R

dont really know the point mate.

i maybe wrong, but dont black paint absorb heat. and thats not the opposite function of the IC?

seems to be doing alright for me

it depends on how fast you are travelling, cold air flow over the intercooler fins.

I used Hamerighte high heat paint

Smokey

Light-R · 27th August 2008, 10:04 PM

m skinner, i have read that article before.

what i dont think i that it applies now.
for that article to be applicable here, the inside of the ic should also be painted black so it would absorb heat from the air inside. as it does absorb heat from the radiation outside leaving the adjancent area colder (and not the interior area as it should).

smokey, cant really see whats the point in posting a pic like that. we all know your car is great but wouldnt it be better with a thin layer of white/no colour?

i actually tried that in my old evo. same turbo, same map, same boost, same ic, same road, same weather/air temp, same speed.

in fact with a black ic i got an increase in intake air temp of 3º

the same applies to intakes on jet engines on commercial aircraft (not the inner part, as it is all CF, but the outter part that is polished metal that helps to dissipate heat. as seen in CFM, RR, etc engines.

GarethK · 28th August 2008, 05:33 AM

M Skinner has said it a few times already - but radiation plays a negligible part in intercooler efficiency.

Intercoolers work by conducting the heat from the charge air into the metal, then into the air stream passing over the intercooler. Conduction through one body of any type is usually much better than between that body and the next (boundaries / film coefficients). Any new 'boundaries' will reduce the efficiency. In reality the coating on the standard I/C is so thin it will make very little difference, and the same goes for you painting a logo on it if you don't go daft.

mambastu · 28th August 2008, 12:04 PM

Quote:

Originally Posted by rushamc

i am looking to paint /spray my fronjt intercooler with either nismo or something similar. does any one have any idea whats the best way of doing this and if anyone has any pics if they have done anything similar. i just want an idea what it would look like and dont wanna screw things up and have it looking shite.

cheers

amar

If you currently have a silver IC that you want a black paint for then Frosts do a black paint specifically for radiator use : Radiator Paint on Frost Auto Restoration Techniques

I've used it on radiators and heater matrix's and it seems ok.

stagea-RS4-96 · 28th August 2008, 04:10 PM

Lol, as long as you dont use Dulux max black gloss it'll be fine. A thin coat of any colour paint will make next to no difference to the efficiency of your IC. Esp if you are just going to dust a logo on through a mask.

rasonline · 30th August 2008, 01:33 PM

This discussion is kind of pointless.. painting the IC black won't have a significant impact on the average intercooler temps compaed to if it is just plain. At least not to the point that you will be losing performance. Unless you have a full out race car and an extra 3bhp at max rpm is worth USD10,000 to you... or if you use a very heavy paint like "stagea" mentioned.

27th August 2008, 03:33 PM	#1 (permalink)
rushamc GTR Register Member Join Date: Apr 2006 Posts: 230	intercooler paint i am looking to paint /spray my fronjt intercooler with either nismo or something similar. does any one have any idea whats the best way of doing this and if anyone has any pics if they have done anything similar. i just want an idea what it would look like and dont wanna screw things up and have it looking shite. cheers amar

27th August 2008, 07:38 PM	#4 (permalink)
M SKinner GTROC Member Join Date: Feb 2007 Location: Croydon, Surrey Posts: 616	Black will actually radiate heat faster than any other colour BUT an IC works primarily by conducting the heat into the airsteam and not by radiating it so an additional coating just means that the heat has to work its way through another layer before coming into contact with air. The effect isnt all that great though as the paint layer is pretty thin. Tbh id just use something like the "high temperature" manifold paint you can get in halfords etc. Its overkill for an intercooler but doesnt require a primer layer and goes on in nice thin coats with a satin black finish __________________ Matt Skinner R32 GTS-4, R32 GT-R project

27th August 2008, 09:11 PM	#6 (permalink)
M SKinner GTROC Member Join Date: Feb 2007 Location: Croydon, Surrey Posts: 616	Have a read: Black Body Radiation "In fact, we can be much more precise: a body emits radiation at a given temperature and frequency exactly as well as it absorbs the same radiation. This was proved by Kirchhoff: the essential point is that if we suppose a particular body can absorb better than it emits, then in a room full of objects all at the same temperature, it will absorb radiation from the other bodies better than it radiates energy back to them. This means it will get hotter, and the rest of the room will grow colder, contradicting the second law of thermodynamics. (We could use such a body to construct a heat engine extracting work as the room grows colder and colder!)" But radiation isnt really a major factor on an IC __________________ Matt Skinner R32 GTS-4, R32 GT-R project

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27th August 2008, 04:50 PM	#2 (permalink)
Light-R GTR Register Member Join Date: Apr 2007 Location: lisbon Posts: 666	dont really know the point mate. i maybe wrong, but dont black paint absorb heat. and thats not the opposite function of the IC?

27th August 2008, 09:05 PM	#5 (permalink)
Light-R GTR Register Member Join Date: Apr 2007 Location: lisbon Posts: 666	correct me if i am wrong. air impact of air on the ic will lower its temperature which in sequence will lower the temperature of the passing air inside the ic. black absorbs all of the light components while the white reflects them. so if the ic is painted black will tend to heat a bit more (much like white cars vs. black cars) what will cause the diminuishing of its cooling capabilities. but i could be wrong

27th August 2008, 10:04 PM	#8 (permalink)
Light-R GTR Register Member Join Date: Apr 2007 Location: lisbon Posts: 666	m skinner, i have read that article before. what i dont think i that it applies now. for that article to be applicable here, the inside of the ic should also be painted black so it would absorb heat from the air inside. as it does absorb heat from the radiation outside leaving the adjancent area colder (and not the interior area as it should). smokey, cant really see whats the point in posting a pic like that. we all know your car is great but wouldnt it be better with a thin layer of white/no colour? i actually tried that in my old evo. same turbo, same map, same boost, same ic, same road, same weather/air temp, same speed. in fact with a black ic i got an increase in intake air temp of 3º the same applies to intakes on jet engines on commercial aircraft (not the inner part, as it is all CF, but the outter part that is polished metal that helps to dissipate heat. as seen in CFM, RR, etc engines.

28th August 2008, 05:33 AM	#9 (permalink)
GarethK GTR Register Member Join Date: Aug 2004 Location: Darlington Posts: 756	M Skinner has said it a few times already - but radiation plays a negligible part in intercooler efficiency. Intercoolers work by conducting the heat from the charge air into the metal, then into the air stream passing over the intercooler. Conduction through one body of any type is usually much better than between that body and the next (boundaries / film coefficients). Any new 'boundaries' will reduce the efficiency. In reality the coating on the standard I/C is so thin it will make very little difference, and the same goes for you painting a logo on it if you don't go daft.

28th August 2008, 04:10 PM	#11 (permalink)
stagea-RS4-96 GTR Register Member Join Date: Feb 2008 Posts: 414	Lol, as long as you dont use Dulux max black gloss it'll be fine. A thin coat of any colour paint will make next to no difference to the efficiency of your IC. Esp if you are just going to dust a logo on through a mask.

30th August 2008, 01:33 PM	#12 (permalink)
rasonline GTR Register Member Join Date: Mar 2005 Location: South-East Africa Posts: 1,532	This discussion is kind of pointless.. painting the IC black won't have a significant impact on the average intercooler temps compaed to if it is just plain. At least not to the point that you will be losing performance. Unless you have a full out race car and an extra 3bhp at max rpm is worth USD10,000 to you... or if you use a very heavy paint like "stagea" mentioned.