Table of Contents
The Subaru BRZ, equipped with the FA24 engine, has garnered significant attention from car enthusiasts looking to enhance its performance. One of the most popular modifications for the BRZ is upgrading the intake and exhaust systems. In this article, we will explore the power gains achieved through the installation of the Subaru STI intake and exhaust upgrade.
Understanding the Subaru BRZ FA24 Engine
The FA24 engine is a 2.4-liter flat-four engine that provides a balance of power and efficiency. This engine is known for its lightweight design and low center of gravity, contributing to the BRZ’s agile handling. However, many enthusiasts seek to unlock more power from this capable engine through aftermarket upgrades.
The Importance of Intake and Exhaust Upgrades
Upgrading the intake and exhaust systems can significantly impact engine performance. The intake system is responsible for delivering air to the engine, while the exhaust system allows for efficient expulsion of exhaust gases. By improving these systems, we can enhance airflow, which can lead to increased horsepower and torque.
Benefits of an Upgraded Intake System
An upgraded intake system can provide several benefits, including:
- Improved airflow to the engine
- Enhanced throttle response
- Potential for higher horsepower gains
- Better engine sound
Advantages of an Upgraded Exhaust System
Similarly, an upgraded exhaust system offers numerous advantages, such as:
- Reduced back pressure
- Increased horsepower and torque
- Improved engine sound and aesthetics
- Enhanced overall performance
Testing Methodology
To accurately measure the power gains from the Subaru STI intake and exhaust upgrade, we conducted a series of tests. The testing process involved:
- Baseline dyno runs to establish initial power levels
- Installation of the STI intake and exhaust systems
- Post-installation dyno runs to measure power gains
- Comparison of results to determine effectiveness
Baseline Power Measurements
Before any modifications were made, we conducted baseline dyno runs to determine the initial power output of the BRZ. The results showed that the FA24 engine produced approximately 228 horsepower and 184 lb-ft of torque at the wheels. This data served as a reference point for evaluating the impact of the intake and exhaust upgrades.
Installation of the Subaru STI Intake and Exhaust
The installation of the Subaru STI intake and exhaust systems was straightforward. Both components were designed for easy installation, requiring minimal tools and time. The intake system featured a high-flow air filter and a larger diameter intake tube, while the exhaust system included performance headers and a cat-back exhaust.
Post-Installation Power Measurements
After the installation was complete, we conducted another round of dyno runs to measure the power gains achieved through the upgrades. The results were impressive:
- Peak horsepower increased to 250 hp
- Peak torque rose to 200 lb-ft
This represented a significant increase of 22 horsepower and 16 lb-ft of torque, showcasing the effectiveness of the Subaru STI intake and exhaust upgrade.
Conclusion
In summary, upgrading the intake and exhaust systems of the Subaru BRZ FA24 engine can lead to noticeable power gains. Our testing demonstrated that the Subaru STI intake and exhaust upgrades resulted in an impressive increase in horsepower and torque. For enthusiasts looking to enhance their BRZ’s performance, these upgrades are a worthy investment that can significantly improve driving experience.