If you look at the diagram at the bottom of this page.
http://www.aircompressor.com/imc-piston.htmlI have the 318v model with a 5HP Baldor motor. I didn't even think you could still buy them as I bought mine at an auction 15 years ago and the date of manufacture is 7/26/90
Mine still looks brand new and runs quieter than a lot of the box store vertical compressors.
I guess it puts out just under 23cfms but I'm not sure at what pressure. After I bought it, I lowered my max pressure to 150 since I don't need all that extra pressure and I'm sure it will extend the life of it.
Like I said it keeps up with my sandblasting.
The Belaire also looks cool.