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Too much airflow?

post #1 of 3
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I read somewhere that putting too much airflow thru a radiator actually diminishes its cooling performance.

If this is true how could one determine the optimum fans for any given radiator?
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c04
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c02
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post #2 of 3
That's news to me. I think it's more of too much air flow has diminishing returns, as in going from 2000rpm to 4000rpm (similar fans, double pressure) may only see a 1C difference. On the other side, going from 1000rpm to 2000rpm (similar fans, double pressure) may be a 5C difference.
 
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post #3 of 3
No it's not true. While you can only cool down the water to ambient temp levels so there are diminishing returns, but the single biggest variable in radiator performance is air flow. A single 120 radiator with extremely high speed fans can potentially outperform a quad radiator with very slow speed fans. There is easily 3-5X performance factors with the fan used, it just comes down to noise tolerance.
    
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