An update on the EWP80 Davies Craig electric water pump install. I may have condemned it too early. I disconnected the power and did some tests, albeit at a lowly 22 degrees C. It appears that at a steady 2k rpm there is absolutely no difference in the way the fan is able to control the rising temps and temps increased a few degrees the same as when the the pump was working, although very slowly. This was tested stationary with no ambient airflow. I know with airflow of 20MPH or more there is no issue whatsoever and the engine runs mid to high 80's with out drama.
So at idle though with the pump hooked up and working alongside the fan by the Davies Craig controller, it only takes 1.58 mins from fan kicking in at 92 degrees C to bring it down to 86 degrees C. Without the pump it takes just under 5 minutes so some definite benefits there.
Time to road test as I was previously concerned the Twink water pump was interfering with the DC pump and causing cavitation. The road test today of some 25 miles at an ambient temp of 25 degrees C proved that its perfectly fine and the DC pump did not appear to restrict the OEM one. All in all I was happy but it is yet to be tested in higher temps like we had in the UK a couple of weeks ago. I will also wire it on a timer to run after shutdown to mitigate heat-soak.
