From what I've read on this forum, the stock ECU isn't really properly tunable, but it can be reconfigured somewhat (chase206's OpenGK project provides a lot of information), possibly enough to get you your burbles, by slightly screwing with the fuel map.

The videos I've seen of people running big turbos, superchargers and weird tunes have utilized either an advanced piggyback or a standalone ECU. You can get an idea of what you'll need to be doing from e.g. the wonderful people of the Pibracing channel on Youtube. People have at least had success with MegaSquirt 3s.

Personally, I just received a simple (though not cheap.. it was just under 800€) E85 conversion kit with a tunable injector controller - not a true piggyback but like 70% of one - which should be able to give me more power at the high end. Once I get it installed and tested and the car on the road, I'll post a story about it on this forum.

 

I’ve watch PIBRACING from day one when he announce that he was gonna do a turbo project on his sons i4 07 tiburon. With that saying he is very reserve about certain information he gives out to ppl who message him on what to do on how to do ..Hell i even message him about his fuel tech wiring harness and if he can create a wiring diagram for us on how to install it. His answer was “ Every application is different “and that was it.. nothing after that. Even though my Tiburon was the same year make and model.

Their is a YouTube channel called Limmidwest and he did a turbo project on his V6 Tiburon. His channel might be a little more informative.