Search found 267 matches

by DetroitAC
Sun Sep 17, 2023 12:21 pm
Forum: Automotive Air Conditioning Forum
Topic: Copper hard pipe - any reasons not to use?
Replies: 16
Views: 3315

Re: Copper hard pipe - any reasons not to use?

The suction line impacts performance the most of any pipe or hose. Pressure drop in this line raises the pressure and therefore temperature of the evaporator. Bigger hoses and larger radius bends help performance. The reality though is it has to fit. If you can use a large radius 3/4" tubing, l...
by DetroitAC
Thu Sep 14, 2023 4:59 pm
Forum: Automotive Air Conditioning Forum
Topic: Copper hard pipe - any reasons not to use?
Replies: 16
Views: 3315

Re: Copper hard pipe - any reasons not to use?

Galvanic corrosion, copper is the cathode, aluminum is the anode, vehicles have all the bad conditions necessary for corrosion. Aluminum will be the metal that disappears, refrigerant will be set free.
by DetroitAC
Thu Sep 14, 2023 4:56 pm
Forum: Automotive Air Conditioning Forum
Topic: AC is AC.........Caterpillar backhoe
Replies: 5
Views: 1838

Re: AC is AC.........Caterpillar backhoe

Compressor isn't turning, check clutch relay, clutch wires, clutch coil, coil ground. Maybe Cat disables the clutch relay permanently if you lose charge, and you need to pay the Cat dealer to turn it back on?
by DetroitAC
Thu Sep 14, 2023 4:52 pm
Forum: Automotive Air Conditioning Forum
Topic: Specs for Compressor - Calsonic 73111FA132 AND discussion on substitutions for Subaru Ej25/22
Replies: 60
Views: 11393

Re: Rotate compressor or move ports to side - generally possible? (with specifics for FS10 compressor)

You can't clock one half of an FS-10 90 degrees.

It's 5 bores arranged in a circle, pistons are double ended. (FIXED SWASPLATE - 10 pistons) Look at pentagon and rotate it 90 degrees, it's not the same.
by DetroitAC
Mon Sep 04, 2023 6:33 pm
Forum: Automotive Air Conditioning Forum
Topic: subcool "plateau" - DetroitAC
Replies: 5
Views: 1771

Re: subcool "plateau" - DetroitAC

It does not matter where the receiver is located, anywhere between condenser out and TXV in is OK. Optimum charge is at the end of the subcool plateau for a properly designed system. If you will Frankenstein together a unique system, the end of the plateau is still the best first guess, but non-idea...
by DetroitAC
Sun Sep 03, 2023 10:30 am
Forum: Automotive Air Conditioning Forum
Topic: VDC control unit
Replies: 2
Views: 935

Re: VDC control unit

Scott, you can power and control the variable compressor control valve yourself. It's just an analog coil that produces a force on the control valve. It's a 12V coil, draws about 1 Amp. If you want to control, it uses a PWM signal at 400Hz. Suction pressure is inversely proportional to the duty cycl...
by DetroitAC
Sun Sep 03, 2023 10:15 am
Forum: Automotive Air Conditioning Forum
Topic: subcool "plateau" - DetroitAC
Replies: 5
Views: 1771

Re: subcool "plateau" - DetroitAC

Hi Andrew, I can explain whatever you need to know. Explaining it correctly is another matter :D I'm curious about where you live since you said 5500ft. I was born and grew up at 7250, normally aspirated engines that struggle were a fact of life. The plateau refers to a graph of all relevant paramet...
by DetroitAC
Sat May 20, 2023 4:22 am
Forum: Automotive Air Conditioning Forum
Topic: 2006 Lincoln Navigator Replace Stock Scroll compressor w/piston type?
Replies: 16
Views: 1833

Re: 2006 Lincoln Navigator Replace Stock Scroll compressor w/piston type?

Sorry to chime in late like this, not reading the forum very often I guess. Compressors are designed to leak oil out of the shaft seal. The oil lubricates the seal, there is a little felt ring in the compressor nose to mostly catch the oil, and also to keep customers from complaining about it. Your ...
by DetroitAC
Sun Mar 19, 2023 6:27 pm
Forum: Automotive Air Conditioning Forum
Topic: 2000 Mitsubishi Montero Sport
Replies: 74
Views: 8993

Re: 2000 Mitsubishi Montero Sport

That's a pretty close description to how they work. I would describe it's function as a mechanical superheat calculator coupled to a spring that provides a bias, the whole contraption controlling a metering valve. It's easiest to explain a TXV that has a refrigerant charge in the dome that is the sa...