Guessing 3-4 Lbs. but the only accurate way to do it is with a pressure manifold and monitor the upper and lower side of the system when running. Guessing isn't going to work well enough to make the system run at maximum efficiency. Too much on the high side and you'll be cutting the compressor life down, not enough and your efficiency is down. If you don't have the gauges pay someone to do it and not chance blowing the compressor up. My 2 cents.
__________________
Brad Yost
1973 T/A (SOLD)
2005 GTO
1984 Grand Prix
100% Pontiacs in my driveway!!! What's in your driveway?
If you don't take some of the RACETRACK home with you, Ya got cheated 
  
|