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Originally Posted by Butcher
Generally torque isn't the issue so much as fan size (both diameter and thickness) in determining the maximum backpressure. You can have loads of torque but given enough backpressure the fan will just cavitate.
If you are having problems shifting the air I'd suggest a bigger fan - 60mm is tiny, you'll get much better results with something like a 120mm or bigger (I use a 172x55mm on my radiator and it's great).
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I understand thickness and Im looking around at that now, but a larger size is problematic for the setup. since I am attempting to keep it small and compact. a larger fan like 120mm is about 5" across. then you figure 5-6" pipe to get the air out, you are at a foot wide resevior section. I dont want it that big.
80mm is pushing the size to about 8".
I am looking at the thermaltake 60mm fan, its 25mm thick and says he has a max pressure of 5.3mm-H20. double ball bearing, 21cfm, and 28dB.
theres also some vantec fans that look similair, but dont give a specific pressure.
even so, a larger fan means larger piping, means more water ect ect, should it not be all to scale? where a larger fan NEEDS more pressure?