The Mechanical Water Pump is one of the last mechanical components of the modern engine which has long been considered an inefficient component designed as an accessory for the first engines.

A mechanical belt driven water pump runs at the same speed as the engine regardless of how hot the engine is. Example: when travelling at high speeds down the freeway, the engine require less cooling as ram air is naturally cooling the engine however the engine speed is high as is the mechanical water pump thus providing excessive cooling whilst draining the engine of power. In heavy traffic with high ambient, the engine is idling or slow and so is the belt driven mechanical pump even though in this condition, extra coolant flow is required to cool the engine.
 
With an EWP & Fan Digital Controller (12 & 24V) (Part #8001) (PATENTS: USA 6425353, EU 1133624, AUS 756453), the speed of the pump is managed by the controller which varies the supply voltage to the pump and so varies the speed of the pump up or down hunting for a target temperature. When the engine reaches the target temperature, the controller locks on whilst constantly changing the Electric Water Pump speed to account for traffic and throttle conditions whilst all the while maintaining the target temperature independent of the engine speed.
 
Along with far better engine temperature control, another important improvement for your vehicle comes from the power the mechanical pump takes from the engine can be reclaimed with the use of an EWP hence the fuel savings and increased horsepower. By removing the parasitic power losses of belt-driven water pumps, the EWP may provide up to 10kw of extra power and additional fuel savings. The engine power used by the mechanical pump increases as the cube of its speed – so when the mechanical pump speed doubles from idle speed say; 600rpm to 1200 rpm, the power it takes increases by eight times. Then another eight times going to 2400 rpm, and so on up to maximum engine speed. It is this extra power and torque that is released by deleting the mechanical pump that provides the fuel savings that is estimated to be 3.5% to 10%.
 
Major European Manufacturers have implemented EWP’s as standard issue on a number of their vehicles and our research shows that an EWP uses 90% less energy than conventional systems, i.e.: the mechanical water pump. Other advantages will include lower emissions by virtue of faster engine warm up, better engine temperature management, eliminating engine heat soak and improved engine life.
 
Weight reduction is another benefit and key requirement of any automotive manufacturer seeking fuel savings and better performance. Our EWPs weight between 900 grams up to 1,151 grams dependent on the EWP model whilst a typical mechanical pump is in the range of 3kg up to 5kg. Not only is our EWP considerably lighter, the universal flexible mounting around the engine bay provides options when seeking space within a crowded engine bay for other modifications. 

EWP & CONTROLLER INSTALLATION DEMONSTRATION

PRODUCT RANGE & APPLICATION

Davies, Craig’s range of patented Electric Water Pumps (EWP) and Electric Booster Pumps (EBP) are available in flow rates from 15 L/min (4 gal/min) up to 150 L/min (39.63 gal/min) at 12v & 24volt and in Nylon66 / Alloy housings. Our EWP's are designed for universal fitment to compliment or replace a vehicle’s existing mechanical belt-driven water pump with simple, DIY installation. 

• Davies, Craig recommends using Glycol 50% in water for all EWP & EBP.
• Recommended viscosity range for all EWP & EBP: 100 mPa·s @ -30°C to 1 mPa·s @ 100°C

 

 

Product Selection Guide  Electric Water Pumps
Application		Pump Model	Pump Kit		Pump Combo		Controller / Switch
			Part # 12 V	Part # 24 V	Part# 12 V	Part # 24 V	Part # 12 V	Part # 24 V
Motorbike up to 500cc (Standard)		EBP®15	9001				0444 or 0455
Motorbike 500cc - 1000cc (Std)		EBP®23	9050				0444 or 0455
Motorbike 1000cc - 2000cc (Std)		EBP®25	9005				0444 or 0455
Vehicle Heater System (Standard)		EBP®23	9050				0444 or 0455
LPG (Butane) System (Standard)		EBP®23	9050				0444 or 0455
Intercooler (depending on capacity)		EBP®23	9050
		EBP®25	9005
		EBP®40	9040	9041			0444 or 0455	0444 or 0455
		EWP®80	8005		8907
Engines up to 2.0L (Standard)		EWP®80	8005		8907		8001	8001
Engines up to 2.0L - 3.5L (Standard)		EWP®115	8025 or 8040	8026 or 8041	8930 or 8950	8931 or 8951	8001	8001
Engines up to 3.5L - 5.0L (Standard)		EWP®130	8080	8081	8990	8991	8001	8001
Engines 5.0L or greater (Standard)		EWP®150	8060	8061	8970	8971	8001	8001
Modified Engines Supercharged/Turbo		EWP®150	8060	8061	8970	8971	8001	8001
Drag Racing, Drifting & Speedway		EWP®150	8060	8061	8970	8971	8001	8001
Off Road / 4WDs		EWP®130	8080	8081	8990	8991	8001	8001
Solar Hot Water Systems (depending on size)		EBP®15	9001				0444 or 0455
		EBP®23	9050				0444 or 0455
		EBP®25	9005				0444 or 0455
		EBP®40	9040	9041			0444 or 0455	0444 or 0455

 

 

1. EWP used in conjunction with LCD EWP® Controller (PATENTS: USA 6425353, EU 1133624, AUS 756453)
The Digital Controller has a micro-processer which will run the EWP® at exactly the right flow rate maintaining the engine temperature you ‘set’.

2. EWP used in conjunction with Thermal Switch
Combine the EWP® with an adjustable Thermal Switch to add a cooling boost to an overheating mechanical pump cooling system.

3. EWP Continuous Running
Wire the pump to the ignition for maximum cooling - suitable for race vehicles, very hot climates and chronically overheating engines.
 
EWP Kits come with everything you need for DIY installation including easy to understand instructions.
Digital Controller and Thermal switches are sold separately.

Please visit our buy online section to view ELECTRIC WATER PUMPS range. 

 

EWP HEADER-ADAPTOR KITS

EWP® Header-Adaptor Kits are simply designed to complement the fitment of your EWP® Combo Kit. 

If you’ve purchased an EWP® Combo Kit, then you will have an LCD EWP®/Fan Digital Controller with a built-in switch that will thermatically control the new electric Thermatic® Fan in unison with your new EWP®. Simple, easy-to-follow installation instructions are supplied to ensure the Davies, Craig EWP® Electric Water Pump Combo and Header EWP® Header-Adaptor Kits are simply designed to complement the fitment of your EWP® Combo Kit.
EWP® Header Adaptor Kits Adaptor Kit are assembled, mounted and perform in accordance with the product’s design. 

Please visit our buy online section to view EWP HEADER ADAPTOR KITS range.

 HEADER-ADAPTOR FITTING DEMONSTRATION