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When my car was restored, the restorer modified the radiator so that it's now a "full flow" radiator. The inner baffle was removed and now there's an inlet on one tank and an outlet on the other. Now, the water flows from one side to the other like most normal radiators, rather than flowing through half the radiator, turning around and flowing through the other half.
I was told this was the more efficient way to do it because in the stock dual pass configuration, the hot water from the first pass heats up the water from the second pass and makes the radiator less efficient at dumping heat.
Is this true???

Eric Tolnes
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What you had as-stock was a double-pass radiator. What you now have is a single-pass, similar to that in a Corvette except the Corvette radiator is aluminum and is 25% bigger. After spending the money to convert it, I'd say, try it and see how things are this summer, then tell us. I know of exactly one Pantera that runs this configuration.
My family owns a radiator shop. One thing that we have found is that the double pass radiator flows the water to fast and does not allow the water to be cooled by the fins. I personally had the double pass taken out of my radiator and it helped. We have found this to be true in multiple street rods that we have worked on.
Thanks Guys.

The reason I ask is my radiator has a tiny leak in the side of the tank that I've tried to get fixed a couple of times, but each time it was "fixed" it still weeped once it heated up.
I'm fed up with trying to fix it. Besides, the core doesn't look all that great near the bottom.
I've decided to order a new one from Fluidydne, but before I ordered one custom made to be a "single pass", I just wanted to know if it was worth doing, as opposed to just ordering their stock double pass one.

One more question:
On a stock double pass radiator, does the water flow through the top half first or the bottom half?

Eric
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