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The N55 engine, known for its balance of performance and efficiency, has become a popular choice for enthusiasts looking to upgrade their turbochargers. In this article, we will compare two of the top turbo options available for the N55: the Garrett GTX2867R and the BorgWarner EFR 7670. Both turbos are designed to deliver impressive power gains, specifically in the 350-420 horsepower range. Let’s dive into the details to help you choose the right turbo for your needs.
Overview of the N55 Engine
The N55 engine is a 3.0-liter inline-six turbocharged engine produced by BMW. It features a single twin-scroll turbocharger and is known for its smooth power delivery and responsive performance. With the right upgrades, the N55 can achieve significant horsepower increases, making it a favorite among tuners.
Garrett GTX2867R Turbocharger
The Garrett GTX2867R is a popular choice for those looking to upgrade their N55 turbo. It is designed to provide a balance of quick spool and high-end power, making it suitable for a range of applications.
Specifications
- Compressor Wheel: 67mm
- Turbine Wheel: 60mm
- Max Horsepower: 500 HP
- Boost Range: 20-30 PSI
Performance Characteristics
The GTX2867R is known for its quick spool time, allowing for immediate throttle response. This makes it an excellent choice for street driving and autocross applications. The turbo also supports high boost levels, enabling it to reach the upper limits of the N55’s performance capabilities.
BorgWarner EFR 7670 Turbocharger
The BorgWarner EFR 7670 is another top contender for N55 turbo upgrades. It features advanced technology and is designed for high performance across a wide range of RPMs.
Specifications
- Compressor Wheel: 67mm
- Turbine Wheel: 60mm
- Max Horsepower: 600 HP
- Boost Range: 20-30 PSI
Performance Characteristics
The EFR 7670 is known for its excellent spool characteristics, thanks to its integrated wastegate and advanced aerodynamics. This turbo provides strong power across the RPM range, making it a versatile option for both street and track use.
Comparative Analysis
When comparing the Garrett GTX2867R and BorgWarner EFR 7670, there are several factors to consider, including spool time, peak horsepower, and overall performance characteristics.
Spool Time
The Garrett GTX2867R typically spools faster than the EFR 7670, making it more responsive in lower RPMs. This can be advantageous for daily driving and situations where quick throttle response is essential.
Peak Horsepower
While both turbos can support similar boost levels, the BorgWarner EFR 7670 has a higher peak horsepower rating, making it a better choice for those looking to maximize their N55’s power output.
Overall Performance
The choice between the two turbos ultimately depends on your specific needs. If you prioritize quick spool and responsiveness, the Garrett GTX2867R may be the better option. However, if you are looking for maximum power and versatility, the BorgWarner EFR 7670 could be the way to go.
Conclusion
Both the Garrett GTX2867R and BorgWarner EFR 7670 are excellent choices for N55 turbo upgrades, capable of delivering impressive performance in the 350-420 horsepower range. Consider your driving style and performance goals when making your decision, and you will be well on your way to enhancing your N55’s capabilities.