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Too much airflow?

post #1 of 3
6/10/12 at 8:21am
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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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post #2 of 3
6/10/12 at 8:25am
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
6/10/12 at 9:01am
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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