GrimmSpeed Electronic Boost Controller Subaru - Manual (Page 4)

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Hook up vacuum lines. See Figure 2. Port 3 connects to a high-pressure boost source (there is
a vacuum nipple on the turbo compressor outlet). Port 2 connects to the internal wastegate
actuator vacuum nipple and Port 1 should be routed back to the intake (where the factory
BCS mounts). Remove the factory restrictor pill. It is recommended that a plastic zip tie be
used to secure vacuum lines. The electrical is plug and play with the supplied connector.
Tuning: WGDC controls the actuator / turbo. Tuning to the WGDC is required (approx 30%
reduction in WGDC)
Installation for 2008+ STI: Remove factory boost control solenoid using a 10mm wrench. It
is located underneath the silver bracket mounted on the intake manifold. Unplug the
electrical connector and vacuum lines. Install GrimmSpeed bracket and solenoid while
reusing the factory bolt.
Hook up vacuum lines. See Figure 2. Port 3 connects to a high-pressure boost source (there is
a vacuum nipple on the turbo compressor outlet). Port 2 connects to the internal wastegate
actuator vacuum nipple and Port 1 should be routed back to the intake (where the factory
BCS mounts). The factory restrictor pill can be removed for operation. It is recommended
that a plastic zip tie is used to secure vacuum lines. The electrical is plug and play with the
supplied connector. Tuning: WGDC controls the actuator / turbo. Tuning to the WGDC is
required (approx 30% reduction in WGDC)
E. External Wastegate(EWG) Installation
Hook up vacuum lines. See Figure 3. Port 3 connects to a high-pressure boost source (there is
a vacuum nipple on the turbo compressor outlet). Port 2 connects to the bottom port on the
external wastegate. The factory restrictor pill should be removed for operation. It is
recommended that a plastic zip tie is used to secure vacuum lines. The electrical is plug and
play with the supplied connector.