testing opening pressure is part of adjusting it, if it were i, i would go a few lbs over stock remember black smoke means you are over rich add boost to compensate.

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car