68 charger radiator suggestions

[xs-ivv]

I plan on buying one of these and painting it black. I have no idea of the quality or fitment though. But for $250 delivered and factory appearing, I'll take a chance.

22" Radiator 1966-1969 Charger Cornet Superbee Road Runner RT Mopar B-Body | eBay

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Let us know how the radiator performs for you. I like that it has an original appearance and once its painted black would look great imo.

 

[66Satellite47]

My point was that the wider tubes allow the wider fins to distribute the heat better. I understand "black body radiation", but I don't think that really applies to an aluminum radiator.

 

[diesel_lv]

My point was that the wider tubes allow the wider fins to distribute the heat better. I understand "black body radiation", but I don't think that really applies to an aluminum radiator.

A motorcycle mag did a test on aluminum Harley Davidson heads. They are air cooled w fins. Raw aluminum, black paint and black powder coat. Black paint and raw aluminum were very close, within a couple degrees of each other in cooling ability but the black powder coat remained more than 10° hotter.

And you are correct on the larger tubes, but they must be an oval shape, not a round shape.

 

[66Satellite47]

Mine are oval. No idea what a motorcycle motor wants.

 

[diesel_lv]

Mine are oval. No idea what a motorcycle motor wants.

It's wasn't about what a motorcycle engine wants, it's about the effect of paint on cooling fins. The radiator on You car uses the same principles and painting will not hurt it if done properly however powder coating will.

 

[RJRENTON]

My point was that the wider tubes allow the wider fins to distribute the heat better. I understand "black body radiation", but I don't think that really applies to an aluminum radiator.

The black body radiation principle applies to all thermal radiation devices. T2 4th power-T1 4th power = Absolute power. Or
Blackbody radiation is radiation produced by heated objects, particularly from a blackbody. A blackbody is an object that absorbs all radiation (visible light, infrared light, ultraviolet light, etc.) that falls on it. This also means that it will also radiate at all frequencies that heat energy produces in it.
Since you understand the black body radiation principles you'll know how it applies. Thrre are complex formulas that are applicable but for the sake of brevity are not dhown.
BOB RENTON

 

[66Satellite47]

RJ, I don't doubt your theoretical assessment. However, I do wonder if a painted aluminum part conforms to that, what does the paint/aluminum interface play? Seems only actual empirical testing would give us the answer. I'll just leave my aluminum radiator plain and rely on the tube size, fin style, etc.