I'm not hearing it open (but its' plumbed into the 'zorst so maybe I won't be able to hear it).
Car is boosting at least 15-16psi (haven't let it go any further, for fear of blowing up!) the spring is rated at 14 psi, so something's not right.
Does the pressure line to the bottom absolutely have to be boost pressure, or will it open just based on the spring rating alone?

