I watched a couple of videos on Youtube the other week (can't find them now) and they looked at the OEM map and took the peak fuel values at higher revs as the 'safe' level then adapted them to the lower rev range. They think that by staying within these safe limits no damage will happen to the engine which may be true but as some of us are finding there's more to tuning these vans than just looking at the engine values. The effect of the increased torque at lower revs through the drivetrain seems to be a big factor on the 5 speed gearbox as one example.
If a mapper can find the safe levels for all the aspects of power delivery then that's what you should get. Playing it safer will just give a less noticable improvement which may fall below a customers expectation.
If a mapper can find the safe levels for all the aspects of power delivery then that's what you should get. Playing it safer will just give a less noticable improvement which may fall below a customers expectation.