Using a ac compressor for air

Forgot to add, my 1997 KIA Sportage has a piston compressor but I imagine it wouldn't be a york unit:)

I did the AC to Air Compressor thing on my 80 Toy here in Saudi back in 1996. I used a vane type as it would fit into the space the previous model [smaller bore engine] had the AC. Toyota had moved the AC compressor lower so the 10 mm mounting holes in the block for a DIY bracket were there. I tee'd the crankcase ventilation line to get some filtered and oily air to the compressor. That worked good for short runs filling tires. If I were doing it again I would put an in-line oiler [air tools type] in the inlet line. I had a 120 psi ASTM relief valve in the discharge and used a dry chemical fire extinguisher as an air reservoir strapped to the frame under the drivers seat. I modified a the water pump pulley to have 3 sheaves as one would be for the extra compressor. You will probably have to do something similar as I found there is no way to tighten the fan belt that drives the AC compressor enough to drive the Air Comp too. You need about 3/5 wrap on the pulleys to get enough grip to drive the Air Comp. I used a manual switch on the radiator bracket to turn the Air Comp on and off via the Compressor clutch. After The system got to 40 psig it will out run you airing up tires [even big no tread desert ones!] Sadly there is no way to put this concept on our Troopy. Time you get all that done, if it's possible, maybe better to look at 1/2 or 3/4 HP continuous duty 12V air.
Abqaiq

Do the research and compare Endless Air with Air-on-Board. One has reconditioned compressors and weak mounts and one has new compressors and VERY strong mounts.

Actually search for grungles endless air Michael

Michael,, your mate Grungle gives you the reason : ".....my older Blue Tongue and current ARB unit I have just took way too long when it came to inflating tyres or any job that involved compressed air."