I saw online some people hooking up air compressor lines (with regulator to the wastegate port to test when the wastegate opens. Is this the same as the pressure of the engine? It make sense that 10 psi from an air compressor is the same as 10 psi in an engine. If the wastegate opens fully at 10 psi using the air compressor I should expect the same from it when hooked up to the compressor housing on the turbo. I just want to make sure before I do it to know for sure it's accurate.