You can have the same setup on 10 diff dyno's and you'll get 10 diff readings.
I was at a car show and there was this ( I think it was a 2013) SS. in his car he had a sheet from the dyno. it was 333
I was at a car show and there was this ( I think it was a 2013) SS. in his car he had a sheet from the dyno. it was 333