I had been wondering whether to use the box as it was ! May have to wait a bit , keep trying to weigh up mph per 1000rpm v mph per £££


Fitted a different thermostat for the electric water pumps last week. Although not overheating the system wasnt working quite how I had planned, I wasnt 100% sure about making changes. 140 mile round trip yesterday on A1 & A43, much better control of the pumps than before

The original stat was an intermotor 50219, 88-83 & 92-87 deg, the new one is an intermotor 50215, 92-87 / 97-92 deg. Once up to temperature and cruising the water pumps were running at max speed nearly all the time. Now pumps run at medium speed when cruising and come down to low speed at light loads and standing still.
Max speed for extreme conditions, only cuts in if temp hits 97 deg.