Newbie here...I saw some other posts that 4.5 turns is a good place to be and some said 3.5 turns. I know that the best thing to use is a gauge but has anyone ever measure how many psi 3 turns would yield, 3.5, 4, and 4.5 etc. assuming factory starting spec is 1.5psi? At least this would bring us in the ball park (I would back off 1/2 just to be safe, though). Anyone ever do this? Could this be applied to all high pressure turbo owners?