At your own risk, remove the EMFPA from the right hand side of the metering unit and turn the 3mm (IIRC) allen key 1/8 of a turn clockwise to richen, you'll then need to adjust your idle mixture too as it will now be rich, I would also set the timing with a light to 8Deg BTDC just to be safe...

BUT... IMO... Turn the boost down to stock and drive carefully until setup... There is NO guarantee your fuelling is any where near correct!!