It makes sense that they would either really do it, or just say they do it. Saying it makes the coupe guys feel good because it is a small justification for the money they pay or the version of the E46 they've chosen. Doing it gives the coupe guys that little extra for the higher price they paid.
It doesn't take much cost at all to tweak maps esp once the base map is all there. Throw in a bit more timing, run slightly more aggressive AFRs, compensation maps still can be convervative for the non-optimal situations, and lastly knock failsafe is still there.
Adding 5% more stress to a 70% stressed base, you still end up only a 75% which is barely tickling the engine especially when it is only 75% of the nearly purely friction and thermal stresses - not the major ones like component acceleration forces.
It doesn't take much cost at all to tweak maps esp once the base map is all there. Throw in a bit more timing, run slightly more aggressive AFRs, compensation maps still can be convervative for the non-optimal situations, and lastly knock failsafe is still there.
Adding 5% more stress to a 70% stressed base, you still end up only a 75% which is barely tickling the engine especially when it is only 75% of the nearly purely friction and thermal stresses - not the major ones like component acceleration forces.
