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The FA20 engine, known for its balance of performance and efficiency, has gained a significant following among car enthusiasts. With the right tuning and modifications, it is possible to push this engine to exceed 370 horsepower. This article will explore the process of Stage 3 FA20 tuning, focusing on the benefits of forged internals and upgraded fuel systems.
Understanding the FA20 Engine
The FA20 engine is a flat-four engine developed by Subaru, featuring a unique design that contributes to its low center of gravity. This engine is found in various models, including the Subaru BRZ and Toyota 86. To achieve high horsepower numbers, modifications are essential.
Benefits of Stage 3 Tuning
Stage 3 tuning represents a significant leap in performance. It typically involves extensive modifications that allow the engine to handle increased power levels. The primary benefits include:
- Increased horsepower and torque
- Improved throttle response
- Enhanced overall driving experience
Forged Internals
Forged internals are crucial for handling the increased power levels associated with Stage 3 tuning. Components such as pistons, connecting rods, and crankshafts made from forged materials provide enhanced strength and durability.
- Pistons: Forged pistons can withstand higher temperatures and pressures, reducing the risk of failure.
- Connecting Rods: Upgraded rods provide greater strength to handle the increased stress from higher horsepower.
- Crankshaft: A forged crankshaft ensures better reliability under extreme conditions.
Upgraded Fuel Systems
To support the power increase, an upgraded fuel system is essential. This includes high-flow fuel injectors, upgraded fuel pumps, and a performance fuel pressure regulator.
- High-Flow Fuel Injectors: These injectors allow for a greater volume of fuel to be delivered to the engine, supporting higher horsepower levels.
- Upgraded Fuel Pump: A high-performance fuel pump ensures consistent fuel delivery, especially under high-load conditions.
- Performance Fuel Pressure Regulator: This component maintains optimal fuel pressure, improving engine performance and efficiency.
Supporting Modifications
In addition to forged internals and an upgraded fuel system, several supporting modifications can enhance the performance of the FA20 engine.
- Turbocharger Upgrade: A larger turbocharger can significantly increase airflow, resulting in more power.
- Intercooler Upgrade: An upgraded intercooler helps reduce intake temperatures, improving performance and reliability.
- Exhaust System: A high-performance exhaust system reduces back pressure, allowing for better exhaust flow.
- ECU Tuning: Custom ECU tuning optimizes fuel maps, ignition timing, and boost levels for maximum performance.
Conclusion
Achieving 370+ horsepower from the FA20 engine is an exciting challenge that requires careful planning and execution. By investing in forged internals, an upgraded fuel system, and supporting modifications, enthusiasts can unlock the full potential of their engines, resulting in a thrilling driving experience.