Shoot, I'm trying to remember. This actuator works in reverse of the vac actuator. Normally open is now closed. Which means boost is always available until it builds up and acts upon the actuator. With the rod length longer it wont actuate until the 14PSI/.95 BAR of pressure builds up ( I believe that is the setting of the special actuator). The adjustment allows you to set a lower amount. Up to 91 specs call .85-.95 BAR (12.3-13.7 PSI) and 92-on .75-.85 BAR (10-12.3 PSI). Not sure what a couple additional PSI will do. But I understand that More Air with out an increase in fuel = higher exhaust temps not more power.

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92 300D 2.5L OM602 OBK #59