GrimmSpeed Mazdaspeed Electronic Boost Controller - Manual (Page 9)

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11. Port 2 connects to the internal wastegate actuator vacuum nipple. Remove oem hose on
top of actuator and replace with 4mm hose and bring 4mm hose to Port 2 on the BCS.
12. Port 1 should be routed back to the intake or left to vent to atmosphere. It is
recommended that a plastic zip tie is used to secure vacuum lines.
13. Tuning: WGDC controls the actuator / turbo. Tuning to the WGDC is required. Start at a
WGDC value of 15 and go up from there.
Installation for MazdaSpeed6: