Driving air guns with Porter Cable CF2400?

I would certainly think it should be sufficient for your needs. If it will put out 6.1 SCFM at 90 psi, that should run most impact wrenches and nailers, of course, don't need that much, so you're good there. A couple of years ago, I got lucky and picked up a real nice unit from a body shop that closed down in a small town not too far away from my home, for $15. It's got a 100 gal. tank with a twin cylinder pump on top, powered by a 3 hp, 240 volt motor. It was setting out in the gr beside the shop building, and I don't think the rest of the guys there wanted to take a chance on something they couldn't hear running before bidding. I figured I could replace the motor if that was issue, when I got home, so I waded right in. Was a bit surprised at the lack of bidding, but glad to take it at that price. Good luck with your projects.