Had a go at remapping this last week, via the OBD2 port.
Software is available that lets you alter the various maps making up the ECU programming.
The numbers in the boxes at the top show the maximum fuelling permissible at the given rpm/other criteria.
Suffice to say, It went from 18.009 for the 1/4 mile to 16.832- a decent improvement.
Throttle Pedal Mapping- Tuned
Throttle Pedal mapping- Stock
Boost Limiter - Stock
Boost Limiter- Tuned