Originally Posted by markviiisvt4
so in essence it'* a safty valve rather then a reguleter of psi
The boost bypass valve bypass boost when you don't need it. Like when the TPS reads low. As in your foot isn't on the loud pedal. When you're cruising, you're using boost, but when you let off for a granny in front of you it dumps boost. This saves FUEL.
It'* also a safety.
The valve itself doesn't REGULATE your boost PSI. It'* like an on-off switch really. When you roll onto the throttle firmly, your boost goes up because the engine rpms (and SC rpm'*) are increasing.