Performance driven by innovation

Vehicle engines vary in capacity and have done so since cars first rolled off the production line over 120-plus years ago.
One can head into a car showroom and be greeted with engines as small as one litre and up to seven litres, naturally aspirated, supercharged and/or turbocharged and now electric powered vehicles.
Regardless of size or being an ICE or EV, a vehicle’s ‘cooling’ system is a vital element to ensure the vehicle operates within the manufacturer’s temperature parameters.
Mechanical water pumps offer this service for ICE engines but draw out valuable horsepower and fuel consumption as they perform their perfunctory duty. Electric Vehicles’ batteries require cooling and carry the appropriate components to perform this function.

How it works without an EWP
In an ICE mechanical cooling system, when a hot engine is switched off, there is no coolant circulating, as the radiator or heat exchanger requires fluid to be physically transferred through it to “exchange heat.”
When the engine is operating, a belt drives a mechanical water pump’s impeller that’s generally mounted to the front of the engine block. The engine’s design is such that coolant is pumped through the engine from the radiator to the engine and return governed by a thermostat.
The downside is that once an engine has been switched off, coolant flow stops as there’s no mechanical movement to create coolant flow.
Higher capacity, high horsepower modern alloy engines, or engines under stress, generate massive heat and therefore require a more efficient method of cooling.
Davies Craig says this is where it comes in, with the Australian manufacturer offering a range of Remote-Mounted Electric Water Pumps which can create a difference in both cooling and performance.
The Electric Water Pump will run-on after hot-engine shut-down to overcome heat-soak, which can have disastrous consequences.

What about performance and cooling?
Davies Craig, which states it is one of the largest world-wide manufacturers and suppliers of EWPs, offers its Electric Water Pump range rated by litres-per-minute.
There are currently four Electric Water Pump (EWP) models, and it is important to note the intended application against the flow rate per minute.
These models are the two Alloy EWP80s (90 L/min), the Nylon and Alloy EWP115s, (139 L/min), the EWP140 (147 L/min), and the EWP150 (162 L/Min).
The highest flow, the EWP150, is intended to be used in high performance, turbocharged and/or supercharged engine capacity applications.
In almost all cases, Davies Craig highly recommends the installation of the LCD EWP/Fan Digital Controller.
This patented LCD EWP/Fan Digital Controller will manage the engine’s coolant flow commensurate with engine temperature sending signals to the respective EWP via the installed Thermal Sensor which monitors the rise and fall of the engine’s coolant temperature.
For vehicles such as one with a fuel injected 350 or 351ci or 5.7L Chevy V8 that may have been “chipped” for better performance, Davies Craig says an EWP80 is intended for engines of up to 2.0L capacity and therefore, this model would be unsuitable for performance V8s.
Therefore, it says utilising an Electric Water Pump model EWP150 (162 L/Min) would be far more suitable, and a more even flow of coolant would assist in maintaining a more balanced cooling performance of the engine. It notes there will also be a better throttle response and horsepower gain as a result.
At the other end of the spectrum if one is installing an EWP150 to a 2.0L engine, Davies Craig says it will perform in a superb manner.
In this case, Davies Craig notes the installation of the Davies Craig LCD EWP/Fan Digital Controller would be mandatory to give an even, regulated coolant flow, presuming it is a stock engine and being used for nothing other than normal daily driving.
If you have a race-spec 2.0L plus engine being used in activities such as a drifting competition, for example, Davies Craig recommends you install an EWP150.

For more information, visit www.daviescraig.com.au