Actually I heard that somewhere, on the subject of larger crank pulleys. That was assuming weight difference on an NA engine. I just double checked it, the torque decrease does seem abnormal after all...

Unfortunately when I did my dyno it was a dyno drag day (you line up and they do a dyno one after another for $20 for 3 runs, monthly event) and they said mine needed a different adapter or something like that to measure torque, and asked if I could live without it so they could get through more cars... so I don't have a torque reading, just HP.