Drill should be running clockwise.
I didn't use a housing and instead used a long flathead screwdriver I had laying around that fit perfectly, cut off the handle, and put it in the chuck. Got 40 psi just 2 weeks ago doing that.
If you have lower pressure could it be at the turbo? I've heard that many installations with turbos have a pressure reducer put inline as they don't need, or want, that kind of pressure.
