SafeChav

No, it's open all the time, ur thinking of a metro turbo and it's modulated boost

I remember now + 12V feed comes from fuel pump relay to it.... Just earth the other side and it will be in the open position all the time.

U can by all means fit a bleed valve, but make sure it is a 3 port type. Taking a hose direct from compressor to actuator is ok, but unless you have a -34 it won't boost very much....