Performance Optimization Flashcards
7 cards from real AUDI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Performance Optimization flashcards as text
An Audi technician finds carbon buildup on the intake valves of a 2.0T TFSI engine. Which cleaning method is factory-approved?
Answer: Walnut shell media blasting through the intake ports
Walnut shell blasting via an adapter at the intake manifold is the OEM-recommended method to remove GDI carbon deposits without damaging valve seats.
What effect does increasing ignition advance (earlier spark timing) have on an Audi engine's power output, assuming no knock occurs?
Answer: Increases peak cylinder pressure earlier for more work on the piston
Advancing spark timing allows combustion to peak near TDC, maximizing the force applied to the piston during the power stroke.
Audi's 'RS Torque Rear' mode on an RS3 with torque-vectoring directs more torque to which wheel during a left-hand corner?
Answer: Outer (right) rear wheel
During a left turn, the outer right rear wheel receives more torque, creating a yaw moment that rotates the car into the corner for agility.
A customer complains that their Audi TTS feels sluggish above 4,500 rpm after a software update. Which VCDS measurement block should the technician check first?
Answer: Boost pressure actual vs. specified and ignition timing correction
Comparing actual vs. target boost and checking for timing retard identifies whether the ECU is limiting power due to knock, boost, or temperature protection.
Which exhaust system configuration is typically used on Audi RS models to provide an active sport exhaust note?
Answer: Electronically controlled bypass valves that open at higher rpm/load
Active exhaust flaps open under load/rpm to route gases around the muffler, increasing exhaust note without drone at low speeds.
What is the consequence of running an Audi turbocharged engine on 87 AKI octane fuel when 93 AKI is required?
Answer: ECU retards ignition timing to suppress knock, reducing power and efficiency
The knock sensor detects detonation on low-octane fuel, causing the ECU to pull ignition timing and reduce boost, resulting in measurably less power.
During an Audi quattro drivetrain inspection for performance concerns, the technician measures front-to-rear torque split under normal acceleration. What is the approximate default split on an open center diff quattro?
Answer: 50:50 front to rear
Traditional Torsen-based quattro systems default to a 50:50 torque split under equal traction conditions.