Looks like your logging 20 frames a sec, over a long period of time, yes it does looke choppy. Also looks like your running out of fuel somewhere the duty cycle is almost 90% at times with only 15 psi boost. I don't see any gear changes in the log either. The a/f and rpm is all over the place.
Try doing a 3rd gear run full booost, and log at 10 frames a sec for about 10 secs, might clear some of this up.