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The EJ255 engine is a popular choice among car enthusiasts looking to enhance their vehicle’s performance. With the right modifications, it is possible to achieve impressive horsepower figures, such as 400+ HP. In this article, we will explore how to build an EJ255 performance engine using Cobb Tuning and the FP Green Turbo.
Understanding the EJ255 Engine
The EJ255 is a turbocharged flat-four engine produced by Subaru. It is known for its durability and potential for tuning. Here are some key features:
- 2.5-liter displacement
- DOHC design
- Intercooled turbocharger
- Subaru’s AVCS (Active Valve Control System)
Essential Modifications for Performance
To reach the 400+ HP mark, several modifications are necessary. Below are the essential upgrades:
- Upgraded Turbocharger
- Performance Tuning
- High-Flow Fuel Injectors
- Upgraded Fuel Pump
- Aftermarket Intercooler
- Performance Exhaust System
Upgraded Turbocharger: FP Green Turbo
The FP Green Turbo is a popular choice for those looking to increase their EJ255’s horsepower. This turbocharger provides a balance of spool time and top-end power, making it ideal for street and track use.
Performance Tuning: Cobb Tuning
Cobb Tuning offers a comprehensive suite of tuning solutions for the EJ255. Their Accessport allows for easy adjustments to fuel maps, boost levels, and ignition timing. Here’s how to get started:
- Purchase the Cobb Accessport
- Select the appropriate map for your setup
- Upload the map to your ECU
- Monitor performance and make adjustments as needed
Supporting Modifications
In addition to the main upgrades, several supporting modifications can help maximize performance and reliability:
- High-Performance Intake System
- Upgraded Engine Management System
- Stronger Engine Internals
- Enhanced Cooling System
High-Performance Intake System
A high-performance intake system improves airflow to the engine, which is crucial for maximizing horsepower. Look for systems that include a high-flow air filter and larger diameter piping.
Upgraded Engine Management System
Investing in an upgraded engine management system can provide more tuning capabilities and better control over engine parameters. This ensures that your engine runs efficiently and reliably at higher power levels.
Final Thoughts
Building an EJ255 engine to achieve 400+ HP is an exciting project that requires careful planning and execution. With the right components, such as the FP Green Turbo and Cobb Tuning, you can unlock the full potential of your Subaru engine. Always ensure that each modification is compatible and consider professional assistance for tuning and installation.
Resources for Further Learning
- Cobb Tuning Official Website
- FP Turbo Official Website
- Subaru Forums and Community Groups
- Performance Tuning Books and Guides