Sounds like you can get plenty of air IN, and have done what you can to make the exhaust get out quickly/easily...now, what about spark, compression, vacuum, combustion??? Don't simply throw parts at this and expect results. The beauty of the groove is that economy can be realized without too much money.
Slow down turbo! Are you SURE you know how your engine works? How/what/why the sensors report to the ECU?
Read this forum, Google things for confirmation, build a picture in your head and start tweaking.