If you use a stock AC Compressor you have to make an oiling system. Here is a quick run down of how I made mine, and trust me, it kicks out a lot of air.
Used a small valve cover breather filter for the intake, this run to the low side of the compressor. On this line I created a return for the oiling system (discussed later). Coming out of the high side of the compressor I used stainless steel braided line, since the poly line I used in the rest of the system, was melting since it was getting too hot. The braided line run to an oil separator made by Husky with a spring loaded dump valve at the bottom. From the bottom of the oil separator, I used some small clear tubing that runs to the low side hose discussed above. I dumped some air compressor oil into the low side hose and it cycles through and ends up in the oil separator. Every few minutes, I just turn the dump valve and the oil shoots back into the system. I haven't used mine a ton, but guys on-line with similar setups have run them for a while like this with no problem.
On the output of the oil separator I ran the hose to an old gallon and a half fire extinguisher that I use for a tank. Out of the tank I made a manifold that has a cut off valve, pressure gauge and a regulator. I put a quick disconnect on the end. I ran power to a rocker switch and then to a pressure switch in the system and then to the compressor. The compressor kick on at 90 psi and shuts off at 120 psi. I have a few small leaks some where so I usually keep the system off until I need it. Just to give you an idea of the performance, we aired up 14 33-35" tires in same time it took Axle to air up his 4 tires. We weren't racing, and we had to made some repairs to melted hose, but trust me, it works fast. I put a calibrated zip tie under the stop for the throttle body and it keeps the engine RPMs about 1600.
I'll try to get some pics and a parts list, since I know several people were interested after seeing my system. If you have any questions let me know.
