Hey!
If you have the SK Plus Sporty Drive with 275 HP / 286 HP, you've got a 120mm Pulley. Thats the maximal amount of pressure, which is usable with a "standard-bmw-dme-software" and without any changes at the fuel delivery system.
If you want more power, you should buy a 110mm pulley, another fuel-pressure-regulator (4 BAR) and should spend some time at a good custom tuner to get your DME tuned for a supercharged system...
If you have the SK Plus Sporty Drive with 275 HP / 286 HP, you've got a 120mm Pulley. Thats the maximal amount of pressure, which is usable with a "standard-bmw-dme-software" and without any changes at the fuel delivery system.
If you want more power, you should buy a 110mm pulley, another fuel-pressure-regulator (4 BAR) and should spend some time at a good custom tuner to get your DME tuned for a supercharged system...