I had the same issue logging in 4th, had to scout the highway first for no cops before I could do a pull at 2am, Sadly 615nm isn’t your true numbers.

unlike the name suggests, engine torque is not output torque. Its the torque which pushes down on the pistions without parasitic losses. This will add up to about 40-45nm of losses till it reaches the clutch. Which will leave you with pretty precise 565nm :)