Originally Posted by
Guinnless
You need a standard Weber Marelli fuel pressure regulator set to 3 bar with the vacuum pipe disconnected. Once set, you reconnect the vac pipe.
Standard fuel pressure for the standard Weber Marelli fuel pressure regulator is 3.5 bar with the vacuum pipe disconnected.
But that's for a standard chip. Ask MSD what fuel pressure regulator you should use and at what pressure this must be.