Show the curves of horsepower and torque

Here you go

Thank you but I would like in the game.

Quote from David 09 :

Thank you but I would like in the game.

LFS already has a speedometer, tachometer, and accelerometer. Why do you need the HP/TQ curves when you can see how quickly the vehicle is accelerating?

To better apply scientific knowledge without guesswork, why criticize for that?

Power and torque curves alone are close enough to worthless. Tractive force curves are much more useful.

Have these curves to whether it should shift gears quickly or if the engine is well towers for example

Tractice force curves will give you shift points where the curves cross.