At full load on the brake before the engine is "released" for its acceleration run you will often see and hear the TQ and RPM drop a bit--Not that engine. From our prior 2 years experience at EMC the dyno operator liked to F@#$ with the newer teams and would deliberately hold us @ 2300-2400 rpm for as much as 10-20 seconds--which is a lifetime. That engine was different--It did not fall off or go into detontation at all, it just sat there and sat there and sat there making 400+ ft/lbs @ 2500rpm.