Davies Craig EWP115 Alloy Kit (12V) DC8040

EWP^®115 Kit Remote Electric Water Pump

12 Volt | Kit Part Number: #8040

The EWP^® Kit is a convenient, all-in-one solution for new electric water pump installations, particularly suited to intercooler and auxiliary cooling applications where simple on/off control is preferred. Each kit includes the essential components required to install and wire the EWP® into your system, making setup straightforward and hassle-free.

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.

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Available Options

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

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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

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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.

KIT CONTENTS
PART DESCRPTION	UNITS
EWP®115 Alloy 12V	1
EWP® Basic Wiring Harness	1
Hose Clamps	2
RED - Wire Joiner	1
RED - 6mm Ring Terminal	1
RELAY - 12V 40 Amp 5 Pin W/- Resistor Protection	1
SCREW - SELF TAP 8X3/8 BZ	1

TECHNICAL SPECIFICATIONS
Voltage	12 Volt Pump
Operating voltage	3V DC to 15V DC
Maximum current	10A @ 13V
Flow rate (max)	139 L/min (36.7 US gal/min) @ 13V DC
Operating temp.	-40° to 120°C    (-40° to 248°F)
Pump design	Clockwise centrifugal with volute chamber
Pump weight	920 grams (2.03 lb)
Pump material	Aluminium (powder coated)
Burst pressure	500 kPa (72.5 psi)
Seal	Ceramic face seal
Self Priming	No, none of our pumps are self-priming
Fits hose sizes	35mm to 51mm (1⅜” to 2”) Inlet: -16AN (12) Outlet: -16AN (12)
Push-On fitting Size	EWP Inlet & Outlet 38mm with 3mm Sleeve (#18510) 44mm with 6mm Sleeve (#18511) 51mm

 

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.

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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.

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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.

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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.

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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.

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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)

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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