600 rpm/sec sweep, start at 3000 rpm for 2 seconds :
3000 rpm = 0.7 bar, 550 Nm
3500 rpm = 1.2 bar, 730 Nm
4000 rpm = 1.4 bar, 820 Nm
5500-7000 rpm = 1.5 bar, 880 Nm down to 790 Nm
7500 rpm = 1.5 bar, 750 Nm
The 6766 turbo had the V-band inlet turbine housing, it might be holding it back compared to a larger twin-entry housing.