Well...living in the south west it gets pretty hot in the summer time. I've always found that the domestic vehicles always have ice cold AC and the import vehicles have cool AC. I've never been happy with the AC in any of the Nissans I've owned. All of the domestic vehicles I've owned would literally numb whatever it was pointed to.
So...given my engineering nature
...I decided to see if I could fix this problem. I took a look at some of my coworkers rides and found one major difference; THE LOW PRESSURE AC LINES ARE NOT INSULATED IN NISSAN VEHICLES!!!
So began my experiment. I waited for a hot day in the summer and got a good feel for the response of the AC system and how it performed. Then I went home and insulated what I could reach with some pipe insulation I had laying around my garage. I noticed over the next few days that the performance of the AC system had slightly increased. It would get cooler a bit faster, maintain the cooler temperature, and it seemed that my compressor was not working as hard so it sometimes would turn off.
I'm thinking that due to the heat of the engine compartment, the low side AC line was getting bombarded and causing the efficiency of the system to degrade. Thus, the overall temperature of the system was higher and the system was having to work harder to fight the heat draw from the AC line in the engine compartment and at the same time had to cool the cabin.
I was determined to make my AC work better so I took multiple steps to insulate the rest of the low AC line.
Since I haven't figured out how to paste multiple pictures per post, we'll have to deal with multiple posts for now.
Here's the ghetto insulation I started with.