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The Subaru BRZ has long been celebrated for its lightweight design and engaging driving experience. However, many enthusiasts seek to enhance its performance further. Recent dyno results reveal that with the installation of an AEM exhaust system and an ECU tune, the Subaru BRZ equipped with the FA20 engine can gain an impressive 40 horsepower. This article delves into the details of these modifications and their impact on the vehicle’s performance.
Understanding the FA20 Engine
The FA20 engine is a 2.0-liter flat-four engine that powers the Subaru BRZ and its twin, the Toyota 86. Known for its low center of gravity and balanced weight distribution, the FA20 provides a solid foundation for performance upgrades. The engine features direct fuel injection and a high compression ratio, making it a prime candidate for tuning.
Benefits of Upgrading the Exhaust System
One of the first modifications many Subaru BRZ owners consider is upgrading the exhaust system. The AEM exhaust is designed to improve exhaust flow, reduce back pressure, and enhance the overall sound of the vehicle. Here are some benefits of upgrading to the AEM exhaust:
- Improved Performance: Enhanced exhaust flow can lead to better engine efficiency and increased horsepower.
- Weight Reduction: Aftermarket exhaust systems are often lighter than stock components, contributing to better handling.
- Sound Quality: The AEM exhaust provides a more aggressive and sporty sound, enhancing the driving experience.
The Importance of ECU Tuning
After upgrading the exhaust system, an ECU tune is essential to maximize the performance gains. The ECU (Engine Control Unit) is responsible for managing engine parameters such as fuel delivery, ignition timing, and air-fuel ratios. An ECU tune can optimize these settings to take full advantage of the new exhaust system. Key points about ECU tuning include:
- Custom Calibration: Tuning allows for adjustments tailored to the specific modifications made to the vehicle.
- Increased Horsepower: Proper tuning can unlock additional horsepower and torque, improving overall performance.
- Fuel Efficiency: A well-tuned engine can also lead to improved fuel economy, offsetting some of the costs of modifications.
Dyno Results Overview
After installing the AEM exhaust and performing an ECU tune, the Subaru BRZ was taken to a dyno for testing. The results were remarkable, showcasing a gain of 40 horsepower over stock. Here’s a breakdown of the dyno results:
- Stock Power Output: Approximately 200 horsepower at the crank.
- Post-Modification Power Output: Approximately 240 horsepower at the crank.
- Torque Gains: Significant increases in torque were also noted, enhancing acceleration and drivability.
Real-World Performance Improvements
The increase in horsepower and torque translates to noticeable real-world performance improvements. Drivers reported enhanced throttle response, quicker acceleration, and a more exhilarating driving experience. The combination of the AEM exhaust and ECU tune not only boosts performance but also improves the overall enjoyment of driving the Subaru BRZ.
Considerations Before Modifying
While the gains from the AEM exhaust and ECU tune are impressive, there are several factors to consider before making modifications:
- Warranty Implications: Modifying your vehicle may void certain warranties, so it’s essential to check with your dealer.
- Regulatory Compliance: Ensure that any modifications comply with local emissions regulations.
- Insurance Costs: Modifications can impact insurance premiums, so it’s wise to inform your insurer.
Conclusion
Upgrading the Subaru BRZ with an AEM exhaust and an ECU tune can yield significant performance gains, including an impressive 40 horsepower increase. These modifications not only enhance the driving experience but also showcase the potential of the FA20 engine. For enthusiasts looking to elevate their BRZ’s performance, this combination is a highly effective choice.