Just finished a friends car in Nashville this morning. The heat/humidity was brutal but system's all happy now. Entire system was evacuated with a 5 cfm pump for 1 hour, lines on my guages were pre-charged with r134a so no atmospheric air was introduced to into the system. For those wondering about the high head pressure it's not overfilled(look at the suction). This is why I install lower resistance fan resistors in many of the cars I've converted around here. The high humidity combined with the heat kills efficiency and runs the high side slightly north of my preferred < 2.5x ambient. Either switching out to a higher CFM aux fan or swapping to a higher speed resistor on the stock aux. fan brings the head pressure right into line at around 240-250.
Vent temp when car was pulled in
Vent temp after charging, fan speed 2, recirc engaged 100+ ambient, RH=60%
BMW OBC registering 41.5 degrees Celsius (106.7 F)
Final system pressures idle @110-115ish ambient temps in the garage.
Vent temp when car was pulled in
Vent temp after charging, fan speed 2, recirc engaged 100+ ambient, RH=60%
BMW OBC registering 41.5 degrees Celsius (106.7 F)
Final system pressures idle @110-115ish ambient temps in the garage.
Comment