all the dynos reading your torque provide the correct graph but the graph may not have the correct readings. So the map of your torque and where it rises, drops etc will be correct, but the reading in NM wont.
Im pretty sure all gearbox ratios, diff ratios etc need to be entered before an accurate torque reading can be had?
I used to own a 5LTR commodore and compared to my R34 GTT it had loads more torque, everywhere. More importantly it had usable torque right from the word go, where as turbo engines generally lack this.