Radiator, Double of Triple Pass?

[Wild Bill]

Been reading the benefits of double pass radiators here, noticed they also sell triple pass. Positives? other than standard outlet locations? negatives? Thanks!

 

[Smuggler]

Bill I had the same question a while back. I had bought a new radiator and the whole thing including the core was the exact same size except one was a 2 row and the original one was a three row. After every ones input on this thread http://www.southernairboat.com/phpBB2/viewtopic.php?t=7264&highlight=core+radiator I went with the 2 row I had just bought. I think the general consensus was that the 3 row is really only needed for the Big Blocks. I have a 383 on mine and didn't notice any difference in temperature running the 2 row. No matter how hard I run it, it has never even seen 170 degrees and I do have a restricter in there as well. If you get a chance read that thread I posted the link to.. It is a good read 8)

 

[Wild Bill]

Thanks smuggler! That was a good read however I was referring to double pass like Waterthunder runs, not double tube. On a double PASS the radiator is separated half way down so that the water goes in on one side, travels across the rad and back across to the same side it entered. The triple pass would have two separations so that the inlet/outlet would be on opposite sides.
They are both aluminum double tube.
ebay store price looked great for both the double and triple pass. Checked the website of the manufacture and looks like decent "Made in USA" stuff?
http://www.fsrproducts.com

 

[Wild Bill]

Thanks for all your help! Found this on "Stewart Components" tech section!

Double pass radiators require 16x more pressure to flow the same volume of coolant through them, as compared to a single pass radiator. Triple pass radiators require 64x more pressure to maintain the same volume. Automotive water pumps are a centrifugal design, not positive displacement, so with a double pass radiator, the pressure is doubled and flow is reduced by approximately 33%. Modern radiator designs, using wide/thin cross sections tubes, seldom benefit from multiple pass configurations. The decrease in flow caused by multiple passes offsets any benefits of a high-flow water pump.

 

[Smuggler]

Sorry it was early when I read your post Thought we were talking cores Anyway glad you posted what you found.. I learned something new today