u can use weber carb jets as your restictor and the evaluate your boost curve and adjust the r port size to suit
reducing the c port jet increases boost enlarging the c port jet reduces boost
reducing the r port jet reduces boost increasing the r port jet increases boost
the larger the r port jet tends to increase the over boost spike
I would suggest a 1mm c port jet and a 3.2mm r port jet
if your after 2 bar you will need a -34 for this turbo