How to Turn Up a Stock Audi TT Boost

1. Turn off the Audi TT engine and open its hood.
2. Disconnect the hose leading to the wastegate actuator from the turbo.
3. Connect the open hose end to the boost controller and connect that to the turbo's open valve. Tighten the hose clamp around the turbo valve with the flat head screwdriver.
4. Twist the boost controller 'Boost' knob to the right to turn up the Audi TT's stock boost. Start with only turning the boost up a small degree, and test the TT on the street.