I don't know, Evan. Calibration should start with the adjustment knob all the way out for minimum spring pressure and maximum signal to the actuator. Adjust it tighter to turn up the boost. Maybe that's what you meant and I read it wrong.

And you can't install it in either direction because pressure has to push the ball against the spring. It won't do that if pressure is coming from the behind the spring.



Sixto
87 300D