std pump is 3 bar and 80ltrs an hr, if i remember correctly, i think its right. and the F4R 730 and F7P/R use teh same pump. I THINK!
which is good for about......um, roughly 225-230 bhp.
Larger injectors will allow you to increase flow per duration/duty cycle @ the same pressure. Spray pattern is dictated by the nozzle design you use of which you can choose and change, pressure will not change it to a massive degree.
best to change it via the ecu and with larger injectors, although the std ones will flow more @ a higher pressure......but will need a new pump.