EWP^®115 Combo Remote Electric Water Pump & Controller

12 Volt | Kit Part Number: #8950

The EWP^® Combo Configuration is the ideal solution for a full electric water pump conversion. This setup allows you to remove or disengage the mechanical belt-driven water pump and, in most applications, eliminate the factory mechanical thermostat — delivering precise, fully controlled cooling system performance.

By converting to an EWP^® Combo system, you gain optimal temperature management, improved efficiency, and complete control over your engine’s cooling strategy.

Delivering a massive open flow rate of 139 litres per minute (36.7 g/min)

The EWP®115 Electric Water Pump (12V) is a versatile, high-performance cooling solution suitable for small, medium, large, high-performance and 4WD vehicles.

Designed to improve both cooling efficiency and engine performance, the EWP®115 delivers precise coolant flow independent of engine speed — resulting in better temperature control, increased reliability, and improved overall efficiency.

Available Options

• Pump Only – Part #8140
• Kit – Part #8040
• Combo with Digital Controller – Part #8950

Key Features

• Universal fit across a wide range of vehicle types
• High-efficiency electric operation independent of engine RPM
• Compact, lightweight design for easy installation
• Can be used as a primary or auxiliary water pump
• Ideal for daily driving, performance builds and off-road use

Performance Benefits

• Enhances coolant flow and heat dissipation
• Improves engine temperature control under load
• Reduces parasitic loss from mechanical pumps
• Can complement or fully replace the factory water pump
• Helps increase power delivered to the drive wheels

Built for reliability and efficiency, the EWP®115 is an ideal upgrade for improving cooling performance while gaining usable power and fuel savings.

EWP^® Installation Options

Electric Water Pumps (EWP^®) offer flexible installation methods to suit a wide range of vehicles and performance goals. Whether used to enhance an existing cooling system or fully replace a mechanical pump, an EWP^® delivers improved cooling efficiency, reduced engine load, and potential fuel savings.

Auxiliary or Replacement Installation

An EWP^® can be installed in two primary ways:

Auxiliary Pump (Recommended for simple upgrades)
Installed alongside the factory belt-driven pump, the EWP^® significantly boosts coolant flow and heat dissipation.

• A short section (approx. 100mm / 4") is removed from the lower radiator hose
• The EWP^® is inserted inline and secured
• Wired via a thermal switch or digital controller
• Can operate in conjunction with electric radiator fans

Performance benefit:
At idle, a mechanical pump typically circulates ~15 L/min. An EWP^®150 can add up to 162 L/min, dramatically improving cooling and reducing heat soak.

Upgrading to a digital controller allows the pump and fans to continue running briefly after engine shutdown, helping prevent heat damage to critical components such as the head gasket.

Disabling the Mechanical Water Pump

This method retains the original pump housing but removes its function:

• Install the EWP^® in the lower radiator hose
• Remove the factory thermostat
• Fit a shorter drive belt to bypass the pump pulley

Optional (continuous operation):

• Modify the thermostat by drilling two 3mm holes to allow constant coolant circulation
• Reinstall with a clean housing and new gasket if required

This approach offers a straightforward installation with minimal modification.

Disengaged Mechanical Water Pump (Recommended Setup)

For improved efficiency while maintaining belt routing:

• Remove the thermostat and mechanical pump impeller
• Reinstall the pump housing to act as an idler pulley
• Block any bypass passages
• Install the EWP^® in the lower radiator hose

This method reduces parasitic loss while avoiding major belt system changes.

Full Removal of Mechanical Water Pump (Ideal Setup)

  

 

 

 

For maximum performance and efficiency:

• Remove the mechanical water pump and thermostat entirely
• Install a block adapter or blanking plate (not supplied)
• Modify or replace the radiator hose to suit EWP^® installation
• Fit an appropriate belt to drive remaining accessories

This setup eliminates mechanical drag and delivers the greatest efficiency gains.

Mounting & Installation Notes

• In most installations, the EWP^® is supported by the radiator hose
• Where additional mounting is required, soft mounting is essential to minimise vibration
• Recommended mounting kits:
  • Part #8700
  • Part #8710
    (Suitable for EWP^®115, EWP^®140, and EWP^®150 models)

Key Benefits of EWP^® Systems

• Increased coolant flow and cooling performance
• Reduced engine load → improved power delivery
• Lower fuel consumption
• Improved engine protection during hot shutdown

EWP & Controller Installation Demo

• 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

HOW TO MANAGE YOUR ELECTRIC WATER PUMP

ELECTRIC WATER PUMP EWP^® & FAN DIGITAL CONTROLLER
12 & 24 Volt | Part Number: #8003, #8103

Provides optimum control of Davies, Craig 12 / 24 Volt Electric Water Pumps and Electric Fans. It Will manage the operation of the EWP^® by varying the speed of the pump in response to the coolant temperature and manage control of your electric engine fan.

Designed for precision, reliability, and ease of use, this next-generation controller features an intuitive colour LCD interface and enhanced functionality for complete cooling management.

Engineered to optimise electric water pump and fan performance, the 8003 delivers greater control, improved visibility, and smarter operation—ideal for performance, street, and motorsport applications.

VARIABLE SPEED EWP^® & FAN CONTROLLER
12 & 24 Volt | Part Number: #0550, 0551, 0555, 0556

Available for Brushed and Brushless Motor applications. High-performance Controller designed to optimise thermal management in automotive, industrial, marine and EV applications. It provides intelligent, precise control of either Brushless dual Thermatic^® Electric Fans or Electric Water Pumps (EWP^®), ensuring maximum, efficiency, system protection and reliable operation in the most demanding environments. 

DIGITAL THERMATIC^® EWP^® & FAN SWITCHES
12 & 24 Volt | Part Number: #0444, 0445, 0448, 0435, 0438

Our very own designed Digital Thermatic^® Fan Switch Kit can be used with our Thermatic Fans, EWP's and competitors Fans. This is a simple on / off switch that can  run 1 or 2 fans and be used for 12 or 24 volt applications. It has an adjustable temperature range of 40ºC to 110ºC (104ºF to 230ºF) which can show Centigrade or Fahrenheit 

For further information, see Product Information