Be aware that if you change the fuel pressure, you will be changing the tune! Also, by going to a larger pump, the old fuel pressure regulator might not be able to pass enough fuel. This would cause an increase in fuel pressure, especially at idle and low to medium load.

Is it an adjustable pressure reg? If it is, dont adjust it without checking the fuel mixtures.
Fuel pressures can be anything from 38psi to 75psi. It depends on where the tuner has set it. If its a non ajustable factory unit, its probably about 45psi(3 bar).
If you can smell fuel, it must be very rich or have a leak.

I would look for leaks, then check mixtures with a wideband sensor or multi gas analyser.