Jim, not stacked. Just the 62mm pulley. Was stacked before on a different car with crossover manis and custom exhaust. Maximum boost i ever measured before: 21 PSI (166/65). Had to rise fuel pressure up to 5.1 bar aprx 73 psi not to lean out on the Autobahn. But no code at this time. Again, this is a new car. I want to keep it simple. But I see, i cannot :-)

I am waiting for the SL55 fuel pump tomorrow and a new fuel filter and I have to weld a bung to the exhaust for my Innovate wideband controller to see whats going on. Obviously the engine is in good shape and no belt slip on the pulley. I don`t want to hurt nothing.