The A/C Compressor would make strange grinding noise when turning on, so I took to the shop. They replaced the compressor, drier, vacuumed the system. After picking up the A/C was only cooling (while sitting) at about 60 degrees F, 48 degrees F while driving.

I'm expecting 34-40 degrees driving maybe 40-45 while sitting from the vent. Is this an incorrect assumption?

My mechanic said the pressure of the system with clutch engaged is below, does this sound right?

LOW 45 PSI
HIGH 225 PSI

Any help would be appreciated.