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The Subaru WRX is renowned for its performance and tuning potential. Enthusiasts often explore various modifications to enhance engine power, especially when it comes to turbochargers. In this article, we will compare the stock WRX engine, upgraded turbo options, and large frame turbos to help you understand the differences and benefits of each setup.
Understanding the Stock WRX Engine
The stock WRX engine is designed to provide a balance of performance and reliability. It features a turbocharged 2.0L or 2.5L flat-four engine, depending on the model year. Here are some key characteristics:
- Power output: Approximately 268 hp (varies by model year)
- Torque: Around 258 lb-ft
- Turbocharger: IHI VF48 (for 2015 and later models)
- Fuel system: Direct injection in newer models
Upgraded Turbo Options
Upgrading the turbocharger can significantly enhance the performance of the WRX. Common options include:
- IHI VF52: A popular upgrade that provides increased boost and better response.
- Garrett GTX2860R: Known for its efficiency and power potential, offering a smoother power band.
- BorgWarner EFR 7163: Features a built-in wastegate and high-flow capabilities for maximum performance.
Each of these turbos can yield different power gains, typically ranging from 300 to 400 hp, depending on supporting modifications and tuning.
Large Frame Turbos
For those seeking extreme power, large frame turbos are the way to go. These turbos can push the limits of the WRX engine, but they require more extensive modifications. Here are some popular large frame options:
- Garrett GTX3582R: Capable of supporting over 500 hp with proper tuning and supporting mods.
- Precision 6266: Known for its high flow and efficiency, suitable for serious builds.
- Blouch Dominator 1.5XTR: Offers a great balance of spool time and peak power.
Large frame turbos can push the WRX engine to its limits, often achieving power outputs exceeding 500 hp, but they require significant upgrades to the fuel system, intercooler, and engine internals.
Comparison of Power Gains
When comparing the different turbo options for the WRX, it is essential to consider the potential power gains and the necessary supporting modifications:
- Stock Turbo: 268 hp, reliable but limited in performance.
- Upgraded Turbo: 300-400 hp, requires upgraded fuel injectors and tuning.
- Large Frame Turbo: 400-600 hp, demands extensive engine modifications and robust fuel systems.
Considerations for Choosing a Turbo
Choosing the right turbo for your WRX involves several factors:
- Power Goals: Determine the horsepower and torque targets you wish to achieve.
- Driving Style: Consider how you intend to use the vehicle—daily driving, track use, or competitive racing.
- Budget: Factor in the cost of the turbo, supporting modifications, and tuning.
- Reliability: Ensure that the chosen setup maintains the durability of the engine.
Conclusion
In conclusion, upgrading the turbocharger on a WRX can lead to significant power gains. Stock turbos provide a solid foundation, while upgraded and large frame turbos offer the potential for high-performance builds. By understanding the differences between these options, enthusiasts can make informed decisions that align with their power goals and driving needs.