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The BMW 335i is a popular choice among car enthusiasts, especially those who enjoy turbocharging their vehicles. One of the critical components in achieving optimal performance is the fuel pump. Upgrading to a high-performance fuel pump can significantly enhance horsepower and overall engine efficiency. In this article, we will explore how the Walbro 450lph fuel pump can help achieve over 40 additional horsepower in your turbocharged BMW 335i.
Why Upgrade Your Fuel Pump?
Upgrading your fuel pump is essential for several reasons, particularly when increasing the power output of your engine. Here are some key points to consider:
- Increased Fuel Flow: A higher flow rate ensures that your engine receives enough fuel to match the increased air intake from turbocharging.
- Improved Performance: More fuel can lead to better combustion, resulting in higher horsepower and torque.
- Reliability: Upgraded pumps are designed to handle higher pressures and flows, reducing the risk of fuel starvation during high-performance driving.
Introducing the Walbro 450lph Fuel Pump
The Walbro 450lph fuel pump is a top choice for those looking to upgrade their fuel system. Known for its reliability and performance, this pump can provide the necessary fuel flow for high-horsepower applications. Here are some features that make it an excellent option:
- High Flow Rate: Capable of delivering up to 450 liters per hour, making it suitable for turbocharged engines.
- Durability: Built to withstand the demands of high-performance driving.
- Easy Installation: Designed to fit in the OEM fuel pump housing, simplifying the upgrade process.
Installation Process
Installing the Walbro 450lph fuel pump in your BMW 335i requires some basic tools and mechanical knowledge. Here’s a step-by-step guide to help you through the process:
- Gather Tools: You will need a socket set, screwdrivers, and possibly a fuel line disconnect tool.
- Relieve Fuel Pressure: Before starting, relieve the fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
- Access the Fuel Pump: Remove the rear seats and access the fuel pump cover under the carpet.
- Disconnect Wiring: Unplug the electrical connector and fuel lines from the pump.
- Remove Old Pump: Unscrew the retaining ring and carefully remove the old fuel pump.
- Install Walbro Pump: Place the Walbro 450lph pump into the housing and secure it with the retaining ring.
- Reconnect Lines: Reattach the fuel lines and electrical connector.
- Test for Leaks: Turn the ignition on to prime the pump and check for any fuel leaks before starting the engine.
Tuning Your BMW 335i
After installing the Walbro 450lph fuel pump, tuning your BMW 335i is crucial to maximize the benefits of the upgrade. Here are some tuning considerations:
- ECU Remapping: A proper ECU remap will ensure that the fuel delivery matches the increased flow rate.
- Boost Level Adjustments: Depending on your turbo setup, you may need to adjust the boost levels to optimize performance.
- Monitoring Air-Fuel Ratios: Use a wideband O2 sensor to monitor your air-fuel ratios and ensure they are within safe limits.
Expected Performance Gains
With the Walbro 450lph fuel pump and proper tuning, many BMW 335i owners report significant performance gains. Here’s what you can typically expect:
- 40+ HP Increase: Many users have experienced horsepower gains of 40 or more, depending on their specific setup.
- Improved Throttle Response: Enhanced fuel delivery leads to a more responsive throttle.
- Better Overall Performance: Increased torque and horsepower translate to a more enjoyable driving experience.
Conclusion
Upgrading to the Walbro 450lph fuel pump is a worthwhile investment for any turbocharged BMW 335i owner looking to increase performance. With its high flow rate and reliability, coupled with proper tuning, you can achieve impressive horsepower gains and enjoy a more thrilling driving experience. Consider this upgrade as a step towards unlocking the full potential of your BMW 335i.