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N55 Turbo Upgrade Comparison: Stock vs BorgWarner S200SX-E vs Garrett GTX3071R
The N55 engine, known for its robust performance and tuning potential, has become a popular choice among car enthusiasts. Upgrading the turbocharger is one of the most effective ways to increase power and efficiency. In this article, we will compare the stock turbocharger to two popular upgrade options: the BorgWarner S200SX-E and the Garrett GTX3071R.
Understanding the N55 Turbocharger
The N55 engine, used in various BMW models, features a twin-scroll turbocharger that provides quick spool times and impressive power delivery. However, for those seeking more performance, upgrading the turbo is a common modification.
Stock Turbocharger
The stock turbocharger on the N55 is designed to balance performance and reliability. It offers a good amount of boost and is efficient for daily driving. However, it may not satisfy those looking for significant power gains.
- Boost Pressure: Approximately 12-14 PSI
- Power Output: Up to 320 HP
- Spool Time: Quick, suitable for street use
BorgWarner S200SX-E
The BorgWarner S200SX-E is a popular aftermarket upgrade for the N55 engine. Known for its robust build and high performance, this turbocharger can significantly increase power output while maintaining reliability.
- Boost Pressure: Up to 30 PSI
- Power Output: 500+ HP
- Spool Time: Slightly delayed compared to stock, but improves at higher RPMs
Garrett GTX3071R
The Garrett GTX3071R is another excellent option for N55 enthusiasts looking for higher performance. This turbocharger is designed for those who want to push their engine to the limits while still enjoying daily drivability.
- Boost Pressure: Up to 28 PSI
- Power Output: 450-500 HP
- Spool Time: Fast spool, providing a strong mid-range boost
Performance Comparison
When comparing the three turbochargers, it’s essential to consider various performance metrics, including power output, spool time, and overall driving experience.
Power Output
In terms of raw power, the BorgWarner S200SX-E takes the lead, offering over 500 HP potential. The Garrett GTX3071R closely follows, providing up to 500 HP as well, while the stock turbo caps out around 320 HP.
Spool Time
Spool time is crucial for maintaining drivability, especially in a daily driver. The stock turbocharger offers the fastest spool time, making it ideal for street use. The Garrett GTX3071R provides a quick spool, while the BorgWarner S200SX-E may have a slight delay but excels in higher RPMs.
Installation and Compatibility
Upgrading to a new turbocharger requires careful consideration of installation and compatibility with the N55 engine. Each turbocharger has specific requirements that need to be met for optimal performance.
Stock Turbo Installation
The stock turbocharger is designed for a straightforward installation process, making it easy for those who want to keep their vehicle’s performance within factory specifications.
BorgWarner S200SX-E Installation
Installing the BorgWarner S200SX-E may require additional modifications, such as upgraded fuel injectors and a custom tune to handle the increased boost levels. It’s crucial to ensure compatibility with the existing engine management system.
Garrett GTX3071R Installation
The Garrett GTX3071R also necessitates some modifications. Similar to the S200SX-E, it may require upgraded fuel components and tuning for optimal performance. Proper installation is key to maximizing the benefits of this turbocharger.
Cost Considerations
When considering a turbo upgrade, cost is an important factor. Prices can vary significantly based on the turbocharger and any additional components needed for installation.
- Stock Turbo: Generally the lowest cost option
- BorgWarner S200SX-E: Higher initial investment but offers more power potential
- Garrett GTX3071R: Mid-range pricing, balancing cost and performance
Conclusion
Choosing the right turbocharger for your N55 engine comes down to your performance goals and driving preferences. The stock turbo provides reliability and quick spool, while the BorgWarner S200SX-E and Garrett GTX3071R offer substantial power upgrades at the cost of some drivability. Consider your needs and budget when making your decision.