As it’s a dual pump setup we must test it both as a single pump setup and with two pumps. First let’s test it as a single pump. For how to read a pressure/flow plot check out our guide.
For these tests we measure the pressure gain across the unit with a D5 strong fitted and vary a faucet/tap to control the flow rate. The D5 strong at 24V gives the absolute maximum performance that could be extracted from the unit:
Most users run around 0.5-1.5GPM of flow. Here we can see that the Alphacool is below the rest of the competition slightly. To see how much we need to plot a load line based on the restriction of our loop:
Although behind the competition the actual effect on flow rate is only around 10-15%. Of course due to noise concerns most users don’t run a D5 strong at 24V but instead use a D5 vario set at setting 3 or 4. A D5 strong at 12V corresponds roughly to a D5 vario at 3.5, so we also measure this setting:
As can be seen the Alphacool is still at the bottom and only provides acceptable ~1GPM performance with a low restriction loop:
On to dual pump performance..
