I had my car re-tuned on Sunday. The only change was installing a large Meth nozzle on the AEM injection kit. I had been running the small nozzle, and it was not enough.
On the small nozzle we managed to get 261whp@6700rpm/220tq@6100rpm at 19 psi.
This is on the Greddy TD04H-15G and a 1.6l.
With nothing but the added flow from the meth kit, power increased significantly.
278whp@6700rpm/248tq@5500rpm at 17 psi
So gained 17whp/28tq from -2 psi.
There is still with room to make more, since we didn't ramp up the boost over 5.5k rpm, still letting it fall to 1 BAR by redline. This was a requirement for the small nozzle, since it didn't flow enough to hold the boost.