No, this was as advised by GTS chris and is totally logical.
Go and have a look at how they work and you will see.
"With ball-and-spring types, a spring-loaded ball is used to block this delivered boost
"signal", until the desired boost level is attained.
It is at this point, that the delivered boost pressure is strong enough to push the spring-loaded ball toward the spring and out of it's seat, allowing the signal to pass, and reach the Wastegate Actuator.
The boost pressure then presses against the Wastegate Actuator's diaphragm, causing its arm to move, so that the Wastegate is opened.
The opened Wastegate then allows the exhaust gases to divert away from the spinning turbine, thus preventing the turbo from boosting higher than the desired level.
The MBC is adjusted by turning a knob
(or other adjustor), which varies the load on the spring inside the MBC.
By adjusting it so there is more load on the spring, you are
'raising the boost" because more boost pressure is required to move the ball off its seat before the signal can pass to the Wastegate Actuator.
By contrast, lessening the load on the spring allows the boost signal to more easily unseat the ball and continue on its voyage to the Wastegate Actuator, so by backing the adjustor away from the spring, you are
"lowering the boost".
The Joe P MBC, and all Hallman Manual Boost Controllers, are ball-and-spring type MBCs.
"
