1jz-gte Fuel pressure
 

Ok so what should the fuel pressure be set for a 1jz-gte? I have a Wahlbro fuel pump and a fuel pressure regulator on, not sure what kind but the 1j is pretty bone stock except for intake filter and IC kit. Heard it was 43 and I am at 36 right now. But someone said it should be tuned with the vacuum disconnected... not sure what this means. Help please?