I'm fitting a VXR turbo to my astra mk4 gsi. It already has a vxr turbo on it but i didn't fit it last but i was reading inthat the vxr turbos release pressure at 10psi where as GSIs release it at 7. So it was saying this has to be adjusted on the actuator. Did anyone else adjust theres and if they havn't would this cause any problems? I woundered would it make it slower or faster if i left it.