Thanks for the reply and the help. I have decided that the wrnech is fine and that I have an air supply problem. I took the wrench to a friend yesterday (Mechanic) and had him hook the wrench up to his air (probably around 125 psi) and it worked fine. My wrench is rated 5.1 SCFM at 90psi, which is exactly what my 20 lb, 5 hp air compressor is. But i've been doing some reading and it seems to me that if you want to run an air tool you need 1.5 times the SCFM out of your compressor than what is listed as average requirements for the tool. So in my case, since the impact wrench is 5.1 SCFM at 90 psi, I would need an average SCFM of about 7.5 at 90 psi from my compressor. I am thinking of buying a 450 ft lb ipact with an average SCFM requirement of 4.0 at 90 psi. Also, my freind suggested running the wrench at higher than 90 psi, but I'm sure I lose SCFM if I do this , right?

Needless to say, this is a little confusing.

Ryan

__________________
RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE