I just converted my 1991 z28 A/C system to freeze 12 the freeze 12 . I pulled a vacuum for 1.5 hours, then added a can of stop leak and a can of oil (both with a net weight of 114g). I then put in 2 cans of the freeze 12 (both with net weights of 340g). I didn't want to overcharge the system so I figured i'd get some #'s and get some suggestions on what to do next.(add awhole can, half a can, jump up and down, etc.)
The ambient temp was 60 deg
The motor was warmed up to about 190 deg
The low side pressure at idle was 34 psi and dropped to 27 psi when I revved up the car
The low side pressure with the car off was 67 psi\
The vent temp with selectors on norm, cool and high was 56 deg

The freeze 12 recomends using 10% less than with r12. my car takes 1.02 kg of r-12. Is the oil and leak detector counted in that weight?
I felt the line that had the high side port on it and it was hot (not sure if thats good or bad)

Also the compressor was not cycling on and off.

(When the system was low both before and after I pulled the vacuum, the compressor would cycle like once every 5 sec and so to charge the system I ran a jumper across the cycling leads which made the compressor stay on.)
Thanks for reading the long post :lala: , any help would be greatly appreciated
-Jimmy

 

I don't have a direct answer as to how much more you can stuff in there.
Why the stop leak then the oil charge?
You only add oil when you replace a component, not a recharge.
Generally the refrigerant weight is a separate entity from the other items added, but since you added pressurized items, you may have to estimate a total since the pressure has to go somewhere.
The outlet temp may drop after a little while since it's going to take some time for all the additional oil to settle.