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The EJ255 engine is well-known for its performance and reliability, particularly in Subaru vehicles. However, to maximize its durability and efficiency, many enthusiasts consider upgrading specific components such as cams and intercoolers. This article delves into how these upgrades can enhance the performance reliability of the EJ255 engine.
Understanding the EJ255 Engine
The EJ255 is a turbocharged flat-four engine that has gained a reputation for its robust design and impressive performance characteristics. It is commonly found in various Subaru models, including the Impreza WRX and Forester XT. The engine’s design allows for a lower center of gravity, which contributes to better handling and stability.
Importance of Performance Reliability
Performance reliability refers to the engine’s ability to perform consistently over time, especially under high-stress conditions. For enthusiasts, maintaining this reliability while pushing the engine to its limits is crucial. Upgrading components like cams and intercoolers can significantly contribute to achieving this goal.
Upgrading Cams for Enhanced Performance
Cams play a vital role in the engine’s performance by controlling the timing and amount of air entering the combustion chamber. Upgrading to performance cams can lead to:
- Increased Airflow: Performance cams can enhance airflow, allowing for better combustion and increased power output.
- Improved Torque: Upgraded cams can optimize torque delivery across the engine’s RPM range, enhancing drivability.
- Better Throttle Response: A cam upgrade can lead to a more responsive throttle, improving overall driving experience.
Choosing the Right Cams
When selecting performance cams for the EJ255, consider the following:
- Lift and Duration: Higher lift and longer duration can improve airflow but may require additional tuning.
- Compatibility: Ensure the cams are compatible with the existing engine setup and other modifications.
- Intended Use: Choose cams based on whether the vehicle is for daily driving, track use, or a mix of both.
The Role of Intercoolers in Performance Reliability
Intercoolers are essential for turbocharged engines as they cool the air entering the engine, increasing density and improving combustion efficiency. Upgrading the intercooler can lead to several benefits:
- Lower Intake Temperatures: A more efficient intercooler reduces intake temperatures, leading to better performance and reliability.
- Increased Power Output: Cooler air allows for more aggressive tuning and higher boost levels without risking engine knock.
- Enhanced Engine Longevity: Maintaining optimal temperatures can reduce wear and tear on engine components.
Types of Intercoolers
There are several types of intercoolers available for the EJ255, including:
- Front-Mount Intercoolers: These are larger and positioned at the front of the vehicle, providing maximum cooling efficiency.
- Top-Mount Intercoolers: These are compact and fit directly above the engine, offering a more straightforward installation but may have limited cooling capacity.
- Water-to-Air Intercoolers: These use water to cool the intake charge and can be very effective in maintaining low temperatures.
Combining Upgrades for Optimal Performance
To achieve the best results, it’s essential to combine cam and intercooler upgrades. This synergy can lead to:
- Increased Overall Power: A combination of improved airflow and cooler intake temperatures results in more power.
- Better Fuel Efficiency: Enhanced combustion efficiency can lead to improved fuel economy, even at higher performance levels.
- Improved Engine Response: The engine will respond better to throttle inputs, enhancing the driving experience.
Considerations for Upgrading
Before proceeding with any upgrades, consider the following:
- Budget: Performance upgrades can be costly, so plan your budget accordingly.
- Tuning: After upgrading, proper tuning is necessary to ensure the engine runs efficiently and reliably.
- Warranty: Check if upgrades will affect any existing warranties on the vehicle.
Conclusion
Upgrading the cams and intercooler on an EJ255 engine can significantly enhance its performance reliability. By carefully selecting the right components and ensuring proper installation and tuning, enthusiasts can enjoy a more powerful and durable driving experience. These upgrades not only improve performance but also contribute to the overall longevity of the engine, making them worthwhile investments for any Subaru enthusiast.