We dyno about 1/3 of the motors to try different things oil, headers, carbs spacers, fuel, etc to run out frt and stay there,we also dynoed motors bought from different engine builders to compare with ours because we didn't use the same components.and to make sure things worked even had a high end blower sieze on the dyno. it's all just a reference because different operater, dyno will give different results
it gives you a base line about timing, fuel curve