Depending on the make, model, year of manufacturing there are a number of options to increase the power, the so called CHIP TUNING:
1. Standard method, where the reading and recording of the software is possible after dismounting the ( EPROM ) chip.
2. With a special hardware the software can read from the chip directly through the jack for diagnostics ( OBDII ).
3. After the dismounting, the Engine Control Unit (ECU) using special hardware an exchange of data with chip is performed through control points on the very plate. This method is used when it is impossible to dismount the chip or it is set in the microcontroller ( BDM ).