Second that having at least 1.5 times your plasma cutter requirement in CFM capacity at the operating pressure of the plasma cutter. I am using Hypertherm45XP which is about 7 CFM. I went with a Dewalt 60 gallon compressor DXCMV5076055 rated for 15.3 CFM at 100 psi. I also modified the compressor with an aftercooler and water separator piped in between the compressor head and tank. I was amazed how much this reduced the temp of compressed air and moisture going into my tank. I then paired that up with an Ingersoll Rand D31ECA100 refrigerated air dyer. Having really dry air is critical for consumable life and cut quality. I have been super happy with this setup. All this piped together using 3/4 copper piping and the necessary pre and post filters.
