AC Systems can be quite finicky. Generally 2 Cans Freon and 1 Can PAG-100 is plenty. Others may disagree but you are slightly overcharged. Low side is about 10/PSI too high and High side should float 230 +/- 15 At idle. You might find as you bring the RPM's up. Your high side pressure will climb too high and the compressor will shut off.