Overview

Davies Craig Electric Brushless Variable Speed Water Pump and Fan Controllers

Davies Craig electric brushless variable speed water pump and fan controllers replace traditional belt-driven mechanical water pumps and fixed thermal fan switches with intelligent, electronic cooling management.

What they are:

* Electric water pump: Remote-mounted inline fluid pump driven by a brushless or magnetic-drive electric motor (flowing roughly 80 to 180+ lpm, depending on model)
* Variable speed controller: Microprocessor- or LCD/PWM-driven unit that actively modulates pump speed (via voltage modulation or 100-1000 Hz PWM) based on coolant temperature
* Fan management integration: Automatically triggers electric radiator fans when coolant exceeds target thresholds (+3 degrees C / +5.4 degrees F over set temp)

Core functions and benefits:

* Target temperature "hunting": Continuously adjusts flow speed to lock onto a user-set target temperature (40 –110 degrees C) independently of engine RPM
* Heat soak elimination: Runs the pump and fan for up to 3 minutes (or drops below target) after engine shutdown
* Parasitic loss reduction: Eliminates mechanical belt drag on the crankshaft, freeing up extra horsepower and torque (typically appx. 5-13+ hp) plus fuel economy gains
* ECU / PWM Integration: Modern brushless controllers support full PWM (100-1000 Hz) for standalone ECUs, intercooler/charge cooler loops, and EVs
* Failsafe and diagnostics: Monitors voltage, sensor open/short circuits, and high/low temperature warnings

Applications

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