GrimmSpeed Electronic Boost Controller Subaru - Manual

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GrimmSpeed 3 Port Boost Control Solenoid
Installation Instructions
2002+ Subaru WRX/STi/LGT/FXT
***Image above is a generic photo, your EBCS may look different***
All GrimmSpeed products are intended for Off-Road use only.
Park your vehicle on a level surface. Fully engage the parking brake and put wheel stops on
the front and rear wheels to keep the vehicle from rolling.
Warning (read before installing):
Before moving forward with the setups outlined below, insure that you have the experience
and confidence to properly tune your car. If not, please consult a tuning professional.
Without a proper tune you can overboost and damage your engine.
Under no circumstances is the GrimmSpeed Solenoid to be used in any applications where
failure of the valve to operate as intended could jeopardize the safety of the operator or any
other person or property.
Note! You must tune for this hardware! Using stock or off-the-shelf EM with a 3-port solenoid
installed in interrupt mode will result in overboosting!
A. Purpose
The benefits of this upgrade are faster spool, ability to hold higher boost, and better control
over boost. A side benefit of the improved boost control is the ability to reach higher target
boost levels in the low (1st and 2nd) gears.