HI carl,

I8PSI, can't be right on stage one regardless of chip as only
actuator change and chip, for 15psi, as std map sensor 2bar,
what map sensor are you using , why not go to stage 3, 803 green injectors,
3,bar map, chip, and should also change fuel pump, but some tuners dont,
use decent, pref hybrid turbo 25psi,peak.grpa, headgasket and build from there,unless engine in poor condition,

Dave.