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The B58 engine found in the BMW M240i has garnered significant attention for its performance capabilities and tuning potential. In this article, we will explore the differences between the stock B58 M240i and a modified version featuring a Stage 2 build with Bosch fuel injectors, achieving an impressive 480 horsepower. This comparison will highlight the performance, driving experience, and key modifications that contribute to the enhanced power output.
Understanding the B58 Engine
The B58 engine is a 3.0-liter inline-six turbocharged unit that has become a favorite among enthusiasts. Known for its smooth power delivery and robust torque, the B58 serves as the foundation for both stock and modified builds. Its design incorporates advanced technology, including:
- Single twin-scroll turbocharger
- Direct fuel injection
- Variable valve timing
Stock B58 M240i Performance
In its stock form, the B58 M240i produces around 335 horsepower and 369 lb-ft of torque. This configuration allows for a 0-60 mph time of approximately 4.2 seconds. The stock setup is well-balanced, providing a comfortable driving experience while still delivering sporty performance.
Key Features of the Stock Setup
- Responsive throttle response
- Adaptive suspension system
- Efficient fuel economy
Stage 2 Build Overview
The Stage 2 build for the B58 M240i takes performance to new heights. By incorporating Bosch fuel injectors and other enhancements, this setup pushes the power output to 480 horsepower. The modifications not only increase horsepower but also enhance overall drivability.
Modifications Included in the Stage 2 Build
- Bigger turbocharger
- Upgraded intercooler
- High-flow fuel injectors (Bosch)
- Performance exhaust system
- Tuning software
Performance Comparison: Stock vs Stage 2
When comparing the stock B58 M240i to the Stage 2 build, the differences in performance are significant. The Stage 2 setup not only increases horsepower but also enhances torque and throttle response, leading to a more exhilarating driving experience.
Acceleration and Speed
The stock M240i achieves 0-60 mph in about 4.2 seconds, while the Stage 2 version can do it in approximately 3.5 seconds. This improvement is a testament to the effectiveness of the modifications made to the engine.
Handling and Driving Experience
With the Stage 2 modifications, the handling of the M240i is noticeably sharper. The upgraded suspension and performance tires provide better grip and stability, allowing drivers to tackle corners with confidence.
Fuel Efficiency Considerations
One of the trade-offs of increasing horsepower significantly is the potential impact on fuel efficiency. The stock M240i offers a balanced fuel economy, while the Stage 2 build may result in higher consumption due to the increased power demands.
Stock vs Stage 2 Fuel Economy
- Stock: Approximately 24 MPG combined
- Stage 2: Approximately 18-20 MPG combined
Conclusion
The B58 M240i is a remarkable engine that offers a solid foundation for performance tuning. The comparison between the stock version and the Stage 2 build featuring Bosch fuel injectors showcases the potential for significant power gains and enhanced driving dynamics. While the stock M240i is already a thrilling car, the Stage 2 modifications elevate the experience to a whole new level, making it an exciting choice for enthusiasts seeking more from their BMW.