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40F degree outlet is about the best possible. Consider it done and successful. That is a 40 degree temp drop compared to ambient. Nice job.

There should be a pressure switch on the low side of the system. This switch has 2-3 functions: 1. Prevents compressor from engaging if low side pressure is too low. This assumes the evaporator is ice blocked, or system too low on charge for safe operation. 2. Cycles compressor on/off if...

You're running a 100 amp Delco brushless unit. The brushless units can be weaker at idle than a brush unit, but they are made to last 1 million miles. Don't be surprised if it dips out of the green at idle with all of that on, depends greatly on your idle speed.

Yep, chart will work. Condenser have fan running?

High side of R-134a should be 2.2-2.5 times ambient temp. Duct outlet should be near 39F. Low side 25-40psi.

Maybe that is what I should do instead of replacing my broken back window glass...

Maybe Rain Bird makes an adapter for the heater fitting. :O

Can I bother somebody with the military A/C add on kit to PM me? I'd like to see the inside of the evaporator box, to see if it could be mounted horizontally with vents pointing down such as on the cab roof. I have seen it here mounted horizontally with vents pointing up in another thread. I...

I don't mean to throw a wrench in the works here, but $850 and even $500 seems like a lot of money just for a mount. I'm looking to ditch my working MV 60 amp alternator with one of higher quality and greater output, and in doing so, need to change the mount (MV uses SAE J-180 "long", which is...