is set to open at. Example: stock Z wastegate opens at 6psi, the wastegate needs at least 6 psi to open, I want it to open at 10psi so I trick it by restricting the amount of pressure it sees- either by putting a small orifice restriction (welding tip) or pulsing the pressure it sees (% dutycycle via solenoid) if I wanted it to open earlier ~3psi? I would need to weaken the diaphragm spring somehow so that lower pressure would be able to open it (which is not an option).