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The attached diagram shows the pre meth configuration on Jeff's car and then after with the BBK-20 solenoid.
First diagram shows MBC that would limit amount of boost to bottom port of External WG.
In second diagram, boost goes through top port of BBK-20, and through COMM port to WG. When meth injection starts, the BBK-20 is energized and air flow is from MBC to N.C. port and out COMM port.
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