2 core vs. 4 core radiator?
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RE: 2 core vs. 4 core radiator? - 11/14/2007 5:15:06 PM
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blueshark
Posts: 2148
Joined: 7/20/2006
From: Dickson, TN.
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All my experience is with the old fashioned radiators(painted copper and tin) and I really don't know about aluminum. I has been my experience that a 4 core for a big block is best, but like I said aluminum dissipates heat better than copper, tin or plastic, and the duel electric fans are most likely better than the old water pump mounted type. Maybe we need to find out what volume of water needs to be cooled to what temp and time in the radiator, for the motor not to over heat and match that to the correct radiator. If it was me, I'd go for a four core but you know me...I'm not the sharpest knife in the drawer.You only punched the block .30 over right? so that shouldn't create any thin wall heating problems. Does the radiator manufacturer have any recommendations? Your big block shouldn't run to hot I wouldn't think. I'm on it brother. Cheers
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RE: 2 core vs. 4 core radiator? - 11/14/2007 5:46:09 PM
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blueshark
Posts: 2148
Joined: 7/20/2006
From: Dickson, TN.
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http://www.radiator.com/article-radiator-myths.html
?????
Aluminum is always better. The fact is: copper, brass, and lead all have better heat dissipation properties than aluminum. Many cars will get no benefit from using an aluminum radiator. The weight reduction won't make a difference for larger vehicles with low-horsepower engines. Aluminum is also more susceptible to acid corrosion.
I thought it was the other way around.....
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God Speed Rich.
www.larosadesign.net
Design, Engineering,Tooling
www.stantonscustomrods.net
"Welcome to Tennessee,
The patron state of shootin' stuff".......Shooter
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RE: 2 core vs. 4 core radiator? - 11/14/2007 7:23:16 PM
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73shark
Posts: 1057
Joined: 4/18/2006
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Why take a chance? I know that BBCs in Corvettes tend to run hot, especially in slow moving traffic due to it being a bottom breather. Also I found out when replacing the core in my '87 IROC, that you don't paint aluminum radiators. Not sure why as I thought black was the best color for radiating heat.
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RE: 2 core vs. 4 core radiator? - 11/14/2007 8:41:40 PM
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C3 Starship
Posts: 4696
Joined: 7/25/2006
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Blueshark;
Those sites are some good starts. I'm seeing a trend here, and it ain't towards aluminum. 
73shark;
My understanding is that if you paint any radiator, you actually place a "radiation barrier" on the surface of the radiator. The bare metal will transfer/dissipate the heat better.
Oh ya, My BB is bored .30 over.
I've been lookin' at Dewitts, they have a great package, but then again, it's an aluminum radiator. I need to dig deeper, and at other suppliers.
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RE: 2 core vs. 4 core radiator? - 11/15/2007 5:24:14 AM
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DeeVeeEight
Posts: 471
Joined: 10/24/2007
From: South Jersey
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I had long time overheating issues with my car and I had a BRAND NEW 4 CORE COPPER/BRASS radiator in it. I tried everything to get it to run cool, but the one item that fixed all my cooling problems was the aluminum radiator. The Copper/Brass unit could not shed heat fast enough and temps would slowly rise to the critical point. The aluminum unit does not have that problem, my engine temps are consistent no matter what the driving conditions, even with the A/C on! I also paid less for the Alum. rad. than I did for the Copper/Brass one 2 years ago - go figure.....
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