But Broquet seems to be an old technology; will Broquet help my fuel injected, computer ECU engine?

The basic function of any engine is to convert the stored chemical energy in fuel to kinetic energy at the wheels. Computer controlled fuel-injection is used to help meter in the correct fuelling taking into account throttle position, engine load, engine rpm, water and ambient temperatures etc. Even with this, the energy conversion is around 20% of its potential. Broquet enhances the fuel thus it improves this energy conversion to give the maximum efficiency for any engine.