DOHC fueel pressure

[voucht]

Hi,
I'm going to fit an adjustable fuel pressure regulator. But I have hard time finding at what pressure it should be adjusted. what is the correct fuel pressure in the injection ramp of my engine : 2.0i DOHC (Sierra/Scorpio) ?

The Haynes service and repair manual says:

[...]
General
Fuel tank capacity (all models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60.0 litres (13.1 gallons)
Fuel octane rating:
Leaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 RON (4-star)
Unleaded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 RON (Premium)
*Models fitted with a catalytic converter must be operated on unleaded fuel at all times. Do not use leaded fuel in such models, as the catalyst will
be destroyed:
System control pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 bar
System type:
2.0 litre SOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bosch L-Jetronic
2.0 litre DOHC models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multi-point fuel injection system, controlled by EEC IV engine
management system
[...]

Is the "System control pressure" (2.5 bar) the correct working fuel pressure ?

If it is not, does anyone know what is the correct working pressure please, or could tell me a rough value to start with the tuning?

Thanks a lot.