Ecutek, or Verso, both of which are reflashes, will be able to retune for your mods.
You shouldn't be driving the car after increasing the capacity without tuning to suit. Or your new engine wont last very long at all. The
ECU has no idea that the capacity is different and the Volumetric Efficiency is different. It will be a injecting a quantity of fuel for a 2L engine while your is a 2.5L.
Also, just bolting a 2.5 bottom end up to 2L heads increases the compression ratio.
Surely who ever built your engine should know this and should have told you.
My advice, dont drive the car until it has been tuned.
That is a factory
ECU, it can handle it, after tuning.
Reflashing involves, downloading the
ECU control data from the EEPROM, making changes to the table with commercial (Ecutek, Verso) or open source (Ecuflash, ROM raider), and then erasing the EEPROM and writing the changed tables to it.
Just like opening a program in your computer, changing it, then saving the changes.
EEPROM stands for Electronically Erasable Programmable Read Only Memory.