Water/Methanol Injection V2
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© 2020 AEM Performance Electronics
CONTROLLER
Settings
The AEM Water/Methanol Injection Controller is a progressive type controller. This means that fluid will be
injected in proportion to the amount of boost that is detected by the internal MAP sensor. In other words, more
boost equals more fluid. It is therefore imperative that the vacuum/pressure connection be made properly and
securely or vehicle/engine damage could occur. In addition, the controller will automatically compensate for any
fluctuations in battery voltage variations to ensure consistent flow under all conditions.
The two knobs on the face of the controller dictate at what manifold (boost) pressure minimum fluid injection
starts and at what pressure maximum/full fluid injection occurs. Fluid injection will ‘progressively’ increase
between these two points as set by the adjustment knobs.
The “Start PSI” dial has a range from 1 psig (full counterclockwise rotation) to 11 psig (full clockwise rotation).
The “Full PSI” dial has a range of 5 psig (full counterclockwise rotation) to 35 psig (full clockwise rotation). It is
suggested to adjust the “Start PSI” value by setting the dial to approximately 25% of the vehicle's maximum
boost. Adjust the full-in value to your maximum possible boost. These are only suggestions; improper use or
setting could result in engine or vehicle damage – please consult your tuner.
Status LED
The controller has an on-board Status LED. This will mimic the operation of the external LED. Upon startup the
current mode is flashed in green on the status LED. It will flash error codes in red as well as illuminate with
varying intensity as a function of flow in green.
