BMS Water/Methanol Injection (WMI) Kit

Water Methanol Injection (WMI) gives you the octane power benefits of race gas or E85 with the convenience of running normal pump gas! 

Build a custom BMS water/methanol injection kit tailored to your vehicle, power level, and installation requirements. Choose from available controllers, pumps, injection nozzles, high-pressure lines, fittings, and universal or vehicle-specific tanks to create the right system for your build.

Complete your setup with plug-and-play nozzle adapters, charge-pipe couplers, and other installation hardware. From compact universal tanks to high-capacity stealth tanks for select BMW applications, this page provides the components needed to assemble or upgrade a complete water/methanol injection system.

Controller:

The controller is the brains of the WMI system! For those equipped with a normal JB4 system you'll select the FSB controller which allows the JB4 to directly run the WMI pump and solenoid for optimal mapping, control, and safety. For those running our all new JB4PRO system (large silver metal box) we've built the FSB control in so you only need the JB4PRO wiring harness! And finally for those running flash only or non-JB4 solutions we offer the AEM universal WMI controller.

The key to a safe and effective Water/Methanol Injection (WMI) setup is tuning integration. All BMS kits integrate to the JB4 tuning system allowing for precise mapping based on boost, throttle position, engine speed, intake temperature, advance, gear, and other data elements available to the JB4 through its CANbus system. In addition, a pump flow signal is fed back to the JB4 allowing for a safe and smooth progressive boost mapping. If the tank runs empty or flow drops for any reason the JB4 will safely back down performance to avoid knock. In addition, WMI can be activated or disabled from the driver’s seat, will automatically disengage during traction control or safety map situations, and WMI flow data can be displayed in dash and/or via your JB4 Mobile logging device.

All kits include the BMS WMI pump made by Aquatec to our specifications. Capable of supporting 200psi or more with a proven track record of performance and reliability, Aquatec is the industry standard for WMI pumps! The BMS WMI solenoid and filter system is also included with all kits. 

BMS offers a variety of water methanol (WMI) tanks, both for universal use, and vehicle specific fitment. Our most popular tank options are the 1.25 gallon universal, and the 2 gallon universal. The 1.25g is meant to be mounted against a flat surface with the pump mounted below, while the 2g can be mounted anywhere in the trunk and includes an integrated pump mount and baffle providing a very clean easy to install package. We also offer several BMW application-specific tanks, sold separately.