The air con gas arrived at work today. Got the kitchen scales out, and worked out how much gas I would need.
Should have taken roughly 560grammes gas.
Standard R12 capacity 700grammes R49/R314A substitute capacity 20% less.
only seemed to take about 250-300grammes. And about 50-100grammes in the aircon kicked in good and proper. with the compressor firing straight up.
It was a bit noisy with the bonnet up, but not overly bad. it sounded like a quiet compressor. checking the sight glass, the stream went from nothing, to bubbles to flowing.
It was colder inside the car than outside, and today that is saying something.
hopefully it will hold.