Gosh, there are just so many variables. I have never really measured. I run the fan on low at first to get the components and ductwork cooled down and the air temp in the low 40s, then I change to auto.

One thing that made a big difference was getting all the crap out of the front fan shroud. Seems like the entire bottom third of the condenser was probably blocked. I was surprised at the improvement from that.

Pulling a really good vacuum on the system before charging, I believe, was a positive factor as well.

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2012 E350
2006 Callaway SC560