I didn't expect that from you, pHaestus.
This is about how the average user can make some measurements, of his home made waterblock. We all know the problems, and the limitations, and it's very clear that a C/W rating is absolutely out of the question, without a proper testbench, and I don't believe that anyone suggested that it was possible to do that at home, with kitchen items!
But...
What can a user do, to measure, or at least confirm, that a modification to his home made waterblock is an actual performance improvement?
I like the manometer idea, and I agree that it would be more accurate than the bucket test.
For those who don't know, a manometer, in this case, would consist of two tubes, connected at the pump's inlet and outlet via a tee. What you do is fill it up with water, about half way, then turn the pump on. You then measure the difference in level of the water, between your two tubes. That result is your pressure difference. Since a pump will provide different flows at different pressures, it's then possible to look up the pressure on the pump's curve, to determine the flow rate.
Of course this assumes that the block has a reasonable flow restriction. For reference, an Eheim 1250 has a max head (water column) of 2 meters (~ 6 feet).
I think a few of us need our egos deflated, and come down for a "walk in the trenches".
