I have a very heavy two stage Ingersol Rand compressor pump. I would estimate that it would take a 10 hp motor to run to full capacity. The first stage piston is 5" in diameter and has a 6" stroke. It must weight 500 lb. I have never run it but it looks good and turns over as expected. I live in Kitchener Ontario Canada and I would like $250 Canadian for it. I can email pictures and serial number to anyone interested.
stan