How much PSI is the A/C pump capable of?

[J.McDonald Knives]

I was wondering how much PSI the A/C pump has. I don't use the A/C but have an idea on how to convert it to an air pump. Got the idea from Junkyard Wars and was going to pipe it into a tank. I want to use the A/C pump because it saves room and I don't have to worry about finding a place to mount a pump and running all that extra wiring. I was going to use the custom bumpers for the tank.

[ivwarrior]

At least 100psi.

Here's the potential problem with what you want to do though. Most A/C compressors are lubed via oil that's mixed in with the refrigerant. Once you evacuate the refrigerant and try to use the compressor as an air compressor, it's no longer getting the lubrication that it needs and will fail. I don't know for sure if Subaru compressors are like this, and couldn't find anything on a quick search. I know some (at least some Jeep) compressors are lubed differently and can function without the refrigerant/oil mixture flowing through the lines.

[J.McDonald Knives]

Thanks. I'll see if I can find some info on it. The one I'll be using if off of either a WRX or STI from probably 05-06. I won't be doing it til I get the motor swapped.

[decke48]

it compresses liquid to 250-300 psi. the do make air pumps for most american cars to cool the Cat idk the psi..

[ivwarrior]

it compresses liquid to 250-300 psi. the do make air pumps for most american cars to cool the Cat idk the psi..

You can't compress a liquid. The AC compressor pressurizes the refrigerant GAS. This high pressure gas then goes through the condensor, where it changes from gas to liquid as it's cooled. When it gets to the evaporator, it absorbs heat from the air, and goes back to a low pressure gas and gets routed back to the compressor.

[J.McDonald Knives]

I found out about York compressors. They are oiled separately and are used a lot in 4x4 trucks and jeeps.

[Colorado_Outback]

Check out power tanks.
http://www.powertank.com/

Less converting, plumbing, tracking down leaks.. Less mess if you ask me.
I love the one I have for my Commando.

[J.McDonald Knives]

I'm trying to not take up a lot of room with something that won't get used very often except for when I go play. Thats why I'm going to make it into the bumper.

[Colorado_Outback]

I'm trying to not take up a lot of room with something that won't get used very often except for when I go play. Thats why I'm going to make it into the bumper.

Just take it out when your not using it, thats the beauty. And like I said no tracking down leaks in your plumbing and bumper tank.
I have helped a couple guys build setups like your talking about for their 4x4's, both of them have switched to power tanks for simplicity.

But each to his own.