so, in your opinion, MB air is as good as it's ever going to be? Yes you can run the evaporator below your "practical limit" as it is being done today. Yes doing that brings consequences and danger if it's not engineered while the car is being designed or operating in the proper heated environment.

My problem is I will have to develop a "false temperature reading" of the ets to get the performance that I want. There's the danger, but it can be made up. The hybrid system I'm talking about will get you cold fast, but it takes operator monitoring. If the evaporator "freezes" you will notice the drop in vent temp; you must manually shut off the AC. You cannot count on the TXV to control, you cannot count on the ets to control. The point is that on really hot days I know you can run a very low evap temp because of the extreme heat flow over the finns; i'm going to make an effort to do it. Perhaps put a switch in line to change ets resistance on days above 100. A complete worry free system? not at all. But I can manage it. On normal days switch off and run MB specs 2to4degreesC.

BTW the TXV can sense a warmer temp also when it "freezes" opening up even more; adding more refridgerant flow danger. The potential for x-tra refridgerant flow is the main reason for adding an accumulator. I understand others are not even putting in that extra safety measure.

With today's technology in the car and temps being registered, monitored, even can be displayed thru the radio; it would be very hard to convince me that outside temp does not adjust the evap temp sensor/switch in todays car with a default setting for protection in case the outside temp sensor fails. My car is an 86. I do not believe it can do all that.

Why is there a "dessert ets spec" on GM cars shipped to the dessert? I guess they run at 32f evaporator but feel special because their car is called dessert spec. NO! Perhaps they know the evaporator can operate below it's "practical limit" and perhaps they know it must run below its "practical limit" for effective cooling/comfort.

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JHaburay

1972 280se 4.5 "princess"
1986 2.3-16v first 100 (099) USA