I Gave My 4 Cylinder B48 BMW 500HP + Reliability!

Introduction

This tutorial will guide you through the process of upgrading your BMW B48 engine by installing a turbocharger, transforming its performance to around 500HP while maintaining reliability. The steps outlined here are based on a DIY turbo install demonstrated on a 2019 G20 330i M Sport, but the process is similar for other B46 and B48 powered vehicles.

Step 1: Prepare the Workspace

• Position the Hood: Lift the hood into the service position for better access to the engine.
• Gather Tools and Parts: Ensure you have the necessary tools and components, including:
  • IM450 Turbo from In Pursuit of Motorsport
  • Downpipe
  • Turbo install kit
  • Oil supply lines
  • Gaskets

Step 2: Remove Engine Covers

• Remove the Engine Cover: Unsnap the cover to expose the engine.
• Take Off Acoustic Cover: This is secured with rubber grommets; pull it off carefully.
• Disconnect Electrical Connectors:
  • Use a flathead screwdriver to release clamps and pull out connectors as necessary.

Step 3: Disconnect Components

• Remove Charge Pipe: Disconnect the clamp and pull it off.
• Unplug O2 Sensors: Use a pick tool to move out of the way and unclip.
• Raise the Car: Lift the vehicle for easier access to the undercarriage.

Step 4: Access the Turbo

• Remove Splash Shield: Take out the shield secured with 10mm bolts.
• Disconnect Coolant Feed Line: Detach the line leading to the turbo.
• Unfasten Downpipe Clamp: Use a 16mm socket to remove the clamp.

Step 5: Remove the Old Turbo

• Drain Coolant: Allow some coolant to escape but do not fully drain the system.
• Remove Turbo Drain and Oil Feed Lines: Take off the lines connected to the turbo.
• Unscrew Turbo Bolts: Remove the five 10mm bolts securing the turbo.

Step 6: Install the New Turbo

• Prepare New Turbo: Slide on the new turbo, ensuring the gasket is positioned correctly.
• Adjust Wastegate: If needed, take off the electronic wastegate and adjust according to factory specs.
• Secure Turbo: Tighten the bolts and connect the oil supply and coolant lines.

Step 7: Reassemble Components

• Reconnect the Charge Pipe and O2 Sensors: Ensure that all connections are secure.
• Install Downpipe: Secure the new downpipe with the provided gasket and V-band clamp.

Step 8: Final Checks and First Start

• Double Check Connections: Ensure all components are tightened and properly secured.
• Clear Fault Codes: If any drivetrain malfunctions occur, adjust the wastegate as needed.
• Start the Engine: Let the car warm up and check for any leaks or unusual noises.

Conclusion

In this tutorial, you've learned how to install a turbocharger on your BMW B48 engine, enhancing its performance significantly. Ensure that you follow up with tuning to maximize the benefits of your new setup. Consider subscribing to the channel for future updates and videos on tuning and performance enhancements.