If the injectors you fitted were from Bosch, and the part numbers were for your car, the pop pressures will be fine. Actually, the injectors are insensitive to small changes in pop pressure anyway - it's really not something to get excited about.

Large changes in pop pressure usually indicate a problem with the injector that needs to be fixed before you reset the pop pressure, but I'm sure you aren't in this regime when you've fitted replacement Bosch injectors.

Which injectors are making the noise?