the problem with tuning ITBs is that you are removing the intake plenum, so its difficult to get a good MAP sensor reading. hondas rely on the map sensor for fuel delivery and ignition timing.

ITB-Turbo solves that problem by including a plenum that you can attatch the map sensor too.

so its no more difficult to tune than a turbo car.

and tuning ITBs alone are not that hard as long as you have the right ITB manifold (hint, build your own.)