DOHCZCEF9

I have a 38 mm TAiL waste gate but the problem is it came with a 9 pound spring when I bought which I was told is equal to 8-9 PSI. I don't want this spring I need a .3 BAR/3-4 pound spring maybe 5 pound if they have them at the highest. I have aboost controller so I can raise the boost myself but I need something lower so I can tune it the first week and not be running 10 PSI the first day. Any takers or helpers.