When not TOT limited the adverse was true with a BK117 B2.
You could squeeze more speed out of the bird with reduceing the Nr.
While doing so, the TQ reduced, so you could add more collective and at the end you gained about 5 to 8 KIAS, compared to 100/102%Nr ;-)
We shuttled birds sometimes and even after taking off second, with this trick is was possible to arrive first ;-)