NickRally,

I think Mirek and br21 mean that the torque is not as flat as in your second graph having level torque from 1500 rpm to about 4500 rpm. Below is a dyno graph for a Mitsubishi EVO 9 group N (32 mm restrictor). Not the best example either because these cars had more boost compared to the current ones (max 2,5 bar absolute).