Table of Contents
When it comes to upgrading your Subaru BRZ with a turbocharger, one of the most critical decisions you’ll face is selecting the right size turbo. The choice between a 58mm and a 62mm turbo can significantly impact your vehicle’s performance and power gains. Understanding the differences between these sizes is essential for achieving optimal results.
Understanding Turbocharger Sizing
Turbochargers are measured by the diameter of their compressor wheel. The size of the turbo affects the amount of air it can move, which in turn influences horsepower and torque. Selecting the right size involves balancing power needs with engine characteristics and driving preferences.
58mm Turbo: Advantages and Considerations
The 58mm turbo is often favored for its balance between quick spool time and sufficient power delivery. Here are some advantages and considerations:
- Quick Spool: The smaller size allows for faster spool times, resulting in improved throttle response.
- Low-End Torque: This turbo can enhance low-end torque, making it ideal for daily driving and street use.
- Fuel Efficiency: Generally, a smaller turbo can provide better fuel efficiency under certain conditions.
- Power Range: Suitable for builds aiming for moderate power levels, typically up to 300-350 horsepower.
Ideal Applications for 58mm Turbo
The 58mm turbo is ideal for those who prioritize responsiveness and daily drivability. It suits:
- Street builds focused on everyday usability.
- Drivers looking for improved acceleration without excessive lag.
- Enthusiasts aiming for a balance of performance and comfort.
62mm Turbo: Advantages and Considerations
The 62mm turbo offers a different set of benefits, often appealing to those seeking higher power outputs. Here are its advantages and considerations:
- Higher Power Potential: Capable of supporting higher horsepower levels, often exceeding 400 horsepower.
- Top-End Performance: Excels in high RPM scenarios, providing significant power at the top end.
- Boost Longevity: Can sustain boost levels better at higher RPMs, making it suitable for track use.
- Turbo Lag: May exhibit more lag compared to smaller turbos, affecting low-end performance.
Ideal Applications for 62mm Turbo
The 62mm turbo is best suited for applications where maximum power is the goal. It fits well for:
- Track builds focused on high RPM power delivery.
- Racers aiming for peak performance in competitive environments.
- Enthusiasts looking to push their BRZ to its limits.
Comparing Performance Characteristics
When deciding between the 58mm and 62mm turbos, it’s crucial to compare their performance characteristics:
- Spool Time: The 58mm turbo spools faster, making it more responsive in lower RPMs.
- Power Band: The 62mm turbo shines in the upper RPM range, delivering power where it counts in racing scenarios.
- Driveability: The 58mm turbo offers better everyday driveability due to its lower lag and enhanced low-end torque.
- Boost Threshold: The 62mm turbo has a higher boost threshold, which may require more tuning for optimal performance.
Factors to Consider When Choosing a Turbo
Several factors should be taken into account when selecting the right turbo size for your BRZ:
- Engine Modifications: Consider your engine’s current modifications and future plans.
- Driving Style: Your driving habits and whether you prioritize daily driving or track performance.
- Power Goals: Define your horsepower targets to determine the appropriate turbo size.
- Tuning Options: Ensure you have access to suitable tuning solutions for your chosen turbo.
Conclusion
Selecting the right size turbo for your Subaru BRZ is a critical decision that can significantly impact your vehicle’s performance. Whether you opt for the quick-spooling 58mm turbo or the high-power 62mm turbo, understanding your goals and driving style will guide you to the best choice. Ultimately, the right turbo will enhance your driving experience and help you achieve your performance aspirations.