Pime Oil?

I have a small tank, in which I put about 4qts of oil. Then connect a line from the tank to the oil pressure switch port on the oil pump. I pour 1 qt of oil over the valve train, then pressurize the tank with shop air at about 30 psi. There is a valve at the tank, so I can shut off the tank, and fire the motor right away, with out taking the time to disconnect anything.