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The BMW M4 is a powerful machine, but for enthusiasts looking to push their performance beyond the factory limits, upgrading the turbocharger is essential. In this article, we will explore the best turbo upgrade options for the M4, specifically focusing on the Garrett G42 and the BorgWarner EFR series, both of which can help achieve over 500 horsepower.
Understanding Turbochargers
Turbochargers are crucial for enhancing engine performance by forcing more air into the combustion chamber. This results in increased power output and efficiency. When upgrading the turbo, it is important to consider factors such as boost pressure, response time, and overall compatibility with your engine setup.
Garrett G42 Turbocharger
The Garrett G42 turbocharger is a popular choice among M4 enthusiasts looking to exceed 500 horsepower. With its advanced technology and engineering, it offers several benefits.
- High Flow Capability: The G42 is designed to support high horsepower levels with its larger compressor and turbine wheels.
- Quick Spool Time: The G42 features a lightweight design that allows for quicker spool times, improving throttle response.
- Durability: Built with high-quality materials, the G42 is engineered to withstand high temperatures and pressures.
Specifications of the Garrett G42
Key specifications of the Garrett G42 turbocharger include:
- Compressor Wheel Diameter: 62mm
- Turbine Wheel Diameter: 57mm
- Max Boost Pressure: 30 psi
BorgWarner EFR Turbocharger
The BorgWarner EFR series is another excellent option for those looking to upgrade their M4 turbo. Known for its innovative design, the EFR turbocharger offers unique features that enhance performance.
- Integrated Wastegate: The EFR series comes with an integrated wastegate, simplifying installation and improving boost control.
- Lightweight Design: The turbo is designed to minimize weight, allowing for better overall vehicle dynamics.
- High Efficiency: The EFR turbochargers are known for their high efficiency, providing strong performance across a wide RPM range.
Specifications of the BorgWarner EFR
Notable specifications of the BorgWarner EFR turbocharger include:
- Compressor Wheel Diameter: 66mm
- Turbine Wheel Diameter: 60mm
- Max Boost Pressure: 32 psi
Comparing Garrett G42 and BorgWarner EFR
When choosing between the Garrett G42 and the BorgWarner EFR, it is essential to consider several factors that may influence your decision.
- Performance: Both turbos can achieve over 500 horsepower, but the G42 may have a slight edge in peak power.
- Spool Time: The Garrett G42 generally spools faster due to its design, which can be a crucial factor for street performance.
- Installation: The BorgWarner EFR’s integrated wastegate simplifies installation, making it a more user-friendly option for some enthusiasts.
Conclusion
Upgrading the turbocharger on your BMW M4 can significantly enhance its performance, especially for those looking to reach over 500 horsepower. Both the Garrett G42 and the BorgWarner EFR offer excellent options, each with unique advantages. Ultimately, your choice will depend on your specific performance goals, budget, and installation preferences.
Whether you choose the Garrett G42 for its high flow capability and quick spool time or the BorgWarner EFR for its innovative design and ease of installation, both options will provide a thrilling driving experience that takes your M4 to new heights.