The Water/Methanol Injection (WMI) Pump Driver has been specifically designed to provide optimal pulse width modulated (PWM) control of water/methanol injection pumps. Each driver can be used to provide a single WMI pump with precision PWM control at frequencies up to 1,000 Hz. The WMI Pump Driver is compatible with all WMI pumps including AEM, Aquamist, Alky Control, Cooling Mist, Devil’s Own, ProMeth (PM 75, PM115, and PM 190), Snow Performance, and the USRT HAMMER (400+psi).
When using PWM to control a solenoid there is a limit to how quickly the solenoid is able to open and close. Below a certain duty cycle the solenoid will never open, and above a certain duty cycle the solenoid will never close. While the opening time is primarily determined by battery voltage, the closing time can vary greatly depending on the hardware being used to control the solenoid. Hardware inside of the Big Amp Solenoid Driver has been designed to minimize the time required for a solenoid to close, allowing a tuner to achieve a maximum possible dynamic flow range from an injection system.
NOTE: This device is intended for continuous operation with heavy current draw. For finer and faster control of intermitan devices with minor load, see our Low Amp Solenoid Driver.
Safely controlling a water/methanol injection (or similar) pump requires either a solid state relay or driver circuit. So does a flow control solenoid for cutting or allowing fluid flow. A complete driver (vs. conventional relay) is vitally important to use. That's because because it reduces voltage spikes that occur when the pump switches off. Such spikes can outright FRY a boost controller or standalone ECU.
KIT INCLUDES:
(1) Water/Methanol Injection Pump Driver
(3) 12 V Diffused Indication LED (Red, Green Blue)
CONTROL DEVICE COMPATIBILITY: Cortex EBC Any ECU or other control device with outputs that are 12 V tolerant and able to sink at least 30 milliamps.
ACTIVATION METHOD: The WMI Pump Driver is activated by pulling the control input (purple wire) to ground.
CONTROL INPUT PULL-UP RESISTANCE: 500 Ω pull-up to supply voltage
MAXIMUM CURRENT: 20 Amps MAXIMUM PWM
FREQUENCY: 1,000 Hz
SIZE: 66.5 mm x 50 mm x 40 mm (2.62 in x 1.97 in x 1.58 in)
GENERAL WIRING DIAGRAM
CORTEX EBC WMI PUMP + ANTI-SIPHON SOLENOID WIRING DIAGRAM
CORTEX EBC WMI PUMP + SECOND STAGE SOLENOID WIRING DIAGRAM
