How to use a manual boost controller

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Sorry for this dumb question, but it has been so long since I've adjusted my Manual Boost Controller, I've forgotten whether you "open" the knob or "close". Boost pressure is delivered to the actuator via a small hose from the compressor outlet, thus forming a control loop. As the boost pressure rises, this pressure Buy NXS Motorsports Manual Boost Controller: Boost Controllers - Amazon.com If you don't know how to set a manual boost controller, the instructions are