The Subaru WRX is known for its performance and rally heritage. One of the most significant modifications enthusiasts consider is upgrading from a stock engine to a built engine. This article delves into the power gains, handling improvements, and cost comparison between a WRX built engine and the stock variant.

Understanding the Stock WRX Engine

The stock WRX engine is designed to provide a balance between performance and reliability. This section outlines its specifications and performance metrics.

  • Engine Type: 2.0L Turbocharged Flat-Four
  • Horsepower: Approximately 268 hp
  • Torque: Around 258 lb-ft
  • 0-60 mph: Approximately 5.4 seconds

Benefits of a Built Engine

A built engine refers to an engine that has been modified or upgraded to enhance performance. Here are some key benefits of choosing a built engine for your WRX.

  • Increased Horsepower: Built engines can achieve significantly higher horsepower ratings.
  • Enhanced Torque: Modifications can lead to greater torque output, improving acceleration.
  • Improved Reliability: Quality components can increase engine durability.
  • Customization: Built engines allow for tailored performance based on individual preferences.

Power Gains from a Built Engine

One of the primary reasons for upgrading to a built engine is the potential for significant power gains. Below, we compare the performance metrics of a built WRX engine versus the stock version.

  • Horsepower: Built engines can reach 350-500 hp, depending on modifications.
  • Torque: Torque can increase to 350-450 lb-ft, enhancing performance.
  • 0-60 mph: Built engines can achieve 0-60 mph in under 4 seconds with proper tuning.

Handling Improvements with a Built Engine

Power isn’t the only benefit of a built engine. Handling improvements are crucial for maximizing performance on the road or track. Here are some enhancements you can expect:

  • Better Weight Distribution: Upgraded components can improve weight distribution.
  • Improved Suspension: Many choose to upgrade suspension alongside the engine for enhanced handling.
  • Tuning Options: Custom tuning can optimize handling characteristics specific to driving style.

Cost Comparison: Built Engine vs Stock

Cost is a significant factor when considering an engine upgrade. Below is a breakdown of the costs associated with both stock and built engines.

  • Stock Engine Replacement: Typically ranges from $4,000 to $6,000, including parts and labor.
  • Built Engine Cost: Can range from $7,000 to over $15,000, depending on the level of modifications and components used.
  • Additional Costs: Upgrading supporting mods (exhaust, intercooler, etc.) can add $2,000 to $5,000.

Conclusion

Choosing between a stock WRX engine and a built engine involves weighing power gains, handling improvements, and cost. While a built engine offers significant performance advantages, it also comes with a higher price tag. Ultimately, the decision will depend on your performance goals and budget.