In shis, episode 125 of powerTec 10, DV shows why internal wastgate turbos
are far less efficient at generating boost than regular turbo's with an independant waste gate. Using an ECOBOOST 2.3 MUSTANG as an example here the mods that can be done to make a stock turbo houseing far more efficient are shown. With a 2.3 ecoboost you can expect a 30 lbs-ft and 30 HP increase for a week ends work and 0$ expenditure.