The only way to REALLY know what your cam gear adjustments do is to tune it on a dyno...not with the butt dyno. Compare the dyno charts, see where power is made and lost with each degree you change the timing. You also need to keep using the same dyno. If you switch from dyno to dyno, obviously you're going to get different readings. You need a solid baseline to start with and go from there, so you have a bearing on what's really going on. If you keep tuning and tuning and you don't make the same kind of power, ditch the cams.