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I went by the results - ie, the temperatures and pressures. As soon as I got the temperatures I expected, I stopped charging. This resulted in roughly the same pressures as with R12. The most important temperature, to my way of thinking, is the temperature at the exit side of the evaporator. When it cools down, it means there is enough gas that it is still vaporizing at the outlet.. Any more charge won't accomplish anything.
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Richard Wooldridge
'01 ML320
'82 300D 4.3L V6/T700R4 conversion
'82 380SL, '86 560SL engine/trans. installed
'79 450SL, digital servo update
'75 280C
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