140-1 and 140-2 are the same engine and fuel control, just set to higher Ng limits.
To set Ng topping we simply climbed (standard lapse rate with spec engine would put you at ~ 8000) until we could get Ng topping (2% droop) without exceeding (696) T5 limits.
Also, normal T/O power doesn't change bewteen -1 and -2 limits, you just have more power available OEI.
Whether you to will hit the Ng or T5 limit first would depend on how the engine was built. You can "trade" Ng for T5 on overhaul. In this case, it is likely he hit T5 first.
Last edited by oleary; 10th February 2013 at 03:00.