I hope the engineers are not adjusting the engine not to exceed max Tq.
Fair comment. My comment probably better suited to describing the process of setting the TQ limiter for an aircraft which actually has a TQ limiter.
Having said that, without a maintenance manual to reference, I assume there would still be a 'target TQ' and max power would be assessed against a chart when conducting engine performance runs. It would be expected to conform within a certain range.
From the 750XL manual:
The power lever is used to control the compressor speed and to control the propeller
pitch in reverse. The power lever is connected to a cam-cluster located on the
accessory gearbox via push/pull cables. The cam transmits power lever movement to
the fuel control unit which modifies the fuel flow to the engine and Ng speed. In the
forward operation mode, the power lever controls Ng speed only and has no effect on
the beta valve.
NG GOVERNOR. The Ng governor controls Ng as a function of the
power lever angle. Driven by the accessory gearbox via the fuel pump,
the Ng governor flyweights rotate at a speed proportional to compressor
speed. The cockpit power lever is linked to the speed-scheduling cam
located inside the governor section of the fuel control unit. Movement of
the power lever from idle to a higher position increases the tension on the
spring and closes the governor bleed to prevent Py from venting to
atmosphere. The centrifugal governor flyweights apply a force in the
opposite direction to reopen the Py bleed.