Table of Contents
The Subaru BRZ, equipped with the FA20 engine, has garnered a significant following among car enthusiasts due to its lightweight design and rear-wheel-drive layout. However, many owners seek to enhance the performance of their vehicles through tuning. In this article, we will explore the potential horsepower and torque gains you can expect from tuning the BRZ FA20 engine.
Understanding the FA20 Engine
The FA20 engine is a 2.0-liter flat-four engine that utilizes a naturally aspirated design. This engine is known for its balance of performance and efficiency. It produces a factory output of approximately 200 horsepower and 151 lb-ft of torque. Understanding the baseline performance of the FA20 is crucial before considering tuning options.
Types of Tuning Options
- ECU Remapping
- Cold Air Intake Systems
- Exhaust System Upgrades
- Turbocharging or Supercharging
- Performance Camshafts
ECU Remapping
One of the most common tuning methods is ECU remapping. This involves modifying the engine’s control unit to optimize fuel delivery, ignition timing, and other parameters. With a proper remap, BRZ owners can expect an increase of around 15-30 horsepower and a similar increase in torque.
Cold Air Intake Systems
Installing a cold air intake system allows for better airflow into the engine, which can improve performance. This modification typically yields an additional 5-10 horsepower. While the gains may seem modest, they can enhance throttle response and engine sound.
Exhaust System Upgrades
A performance exhaust system can reduce back pressure and improve exhaust flow. Upgrading the exhaust can lead to gains of about 10-20 horsepower. Additionally, it can provide a more aggressive exhaust note, which many enthusiasts appreciate.
Turbocharging or Supercharging
For those seeking significant power increases, adding a turbocharger or supercharger can dramatically boost performance. With forced induction, the BRZ can achieve gains of 50-100 horsepower or more, depending on the setup and tuning. However, this modification requires careful consideration of supporting modifications and tuning to ensure reliability.
Performance Camshafts
Upgrading to performance camshafts can enhance engine airflow and improve power delivery at higher RPMs. This modification can provide an additional 10-20 horsepower, particularly when paired with other tuning modifications.
Expected Performance Gains
After considering the various tuning options, here’s a summary of the expected performance gains:
- ECU Remapping: 15-30 hp, 15-25 lb-ft torque
- Cold Air Intake: 5-10 hp
- Exhaust System: 10-20 hp
- Turbocharging/Supercharging: 50-100 hp
- Performance Camshafts: 10-20 hp
Conclusion
Tuning the BRZ FA20 engine can yield significant performance improvements, with potential gains ranging from modest increases to substantial power boosts. It is essential to choose the right combination of modifications based on your performance goals and budget. Always consider the importance of proper tuning and supporting modifications to ensure the longevity and reliability of your vehicle.