Well I dynoed my 240 a little while back, and made some decently good numbers for basically a stock motor. 10 psi yeilded me 267/271 the first two pulls, the last I cranked it up to 11 psi, and managed another 6 whp, totaling to 277whp and 252 ft lbs. Well heres the vids of the runs, the second is a botch, we were just checking the boost, then I adjusted it.
http://www.youtube.com/watch?v=NxJVZgYmue8