My last engine, which at that time made 467hp / 514tq at the crank. I put it on a chassis dyno that said 314hp / 550tq.
Dyno's are weird. I dyno my engines to break them in safely and tune them. I also like to make changes and see what differences occur. The numbers are just for ego and social media likes. I've put many cars on the trailer that made a lot more HP than mine.