It's basically an adjustable check valve.

A spring hold the ball sealed against one side. The screw you turn changes the spring rate. (Sorta like crushing a 1G BOV to make it open later..) You can make the spring "harder" by turning the screw in (crushing the spring) or, make it "softer" by turning the screw out (releasing the spring).

The harder the spring is, the more pressure it takes to move the ball off of the seal. Once it's off the seal, the pressure can then get to the wastegate actuator, opening the wastegate.

There is a small bleed after the ball to release the pressure once you get off the throttle. If it wasn't there the pressure would be "trapped" between the ball and the wastegate actuator; holding the wastegate open.

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1992 Eagle Talon Tsi FWD
Superiority after 60'..


ICQ # 9622983
www3.sympatico.ca/steve.kinnaird

Now, I'll have all kinds of time to talk about DSMs, because I won't be busy fixing mine!