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The EJ257 engine is a popular choice among automotive enthusiasts, especially those looking to push their vehicles to the limits of performance. With the right modifications, it is possible to achieve over 700 horsepower safely. This article will guide you through the process of upgrading your EJ257 with forged internals and other essential components.
Understanding the EJ257 Engine
The EJ257 is a turbocharged flat-four engine produced by Subaru. Known for its robust design and performance potential, it serves as the foundation for many high-performance builds. To safely reach 700+ horsepower, several key modifications are necessary.
Benefits of Forged Internals
Forged internals are crucial for high horsepower builds due to their strength and durability. The primary benefits include:
- Increased Strength: Forged components can withstand higher levels of stress and power.
- Better Reliability: Reduced risk of failure during high-performance applications.
- Enhanced Performance: Improved engine response and efficiency.
Key Components for Forged Internals
When upgrading to forged internals, several components must be replaced or upgraded:
- Forged Pistons: Opt for lightweight, high-compression pistons for better performance.
- Forged Connecting Rods: These rods provide the necessary strength to handle increased power.
- Forged Crankshaft: A forged crankshaft is essential for high-revving applications.
- Upgraded Bearings: High-performance bearings reduce friction and improve longevity.
Supporting Modifications
In addition to forged internals, several supporting modifications are necessary to safely achieve 700+ horsepower:
- Turbocharger Upgrade: A larger turbocharger will provide the necessary airflow for high horsepower.
- Fuel System Upgrade: An upgraded fuel pump and injectors are essential for delivering adequate fuel.
- ECU Tuning: Proper tuning is critical to optimize performance and ensure engine safety.
- Intercooler Upgrade: A larger intercooler helps maintain optimal air temperatures.
Installation Process
Installing forged internals requires careful planning and execution. Follow these steps:
- Disassemble the Engine: Remove the engine from the vehicle and disassemble it carefully.
- Inspect Components: Check all engine components for wear and damage.
- Install Forged Internals: Replace stock internals with forged components, ensuring proper alignment and fitment.
- Reassemble the Engine: Follow the manufacturer’s specifications for reassembly and torque settings.
- Reinstall the Engine: Place the engine back into the vehicle and connect all necessary components.
Testing and Tuning
After installation, thorough testing is essential. Follow these steps:
- Initial Start-Up: Start the engine and check for any leaks or abnormal sounds.
- Data Logging: Use data logging tools to monitor engine parameters during initial runs.
- Tuning Sessions: Schedule multiple tuning sessions to optimize performance and safety.
- Dyno Testing: Utilize a dynamometer to measure horsepower and torque output.
Conclusion
Upgrading the EJ257 with forged internals is an effective way to achieve 700+ horsepower safely. By investing in quality components and following the proper installation and tuning processes, enthusiasts can enjoy enhanced performance while maintaining engine reliability.