Quote:
Originally posted by Turbokeu
Since I have a flowrate of 4.4LPM in my actual setup with a Eheim 1250 (corresponding to a head of 1.8m), with a Johnson CO30 or CM30 in the same setup I should have a theoretical flowrate of more than 20 LPM (following the P-Q curves of both pumps).
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Numbers seem a bit off to me.
If you are getting a 1.8m dP with an Eheim 1250, I'd predict something like 3.3m dP and 5.5 lpm with the CM30. Don't forget that the pressure differential across the cooling system typically increases proportional to the flowrate squared.