The calculator said: 552 rwhp
The dyno said: 594 rwhp

Other calculators have said 561 rwhp. I've also calculated what my injectors would support at 100% DC at a given pressure and 550-560 seems to be in the ballpark IIRC from hartline performance's turbo buick web calc. The only difference for me was I locked the converter on the dyno and did not lock the converter at the track. That could be the 40 hp difference I'm seeing.