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The Nissan RB26 engine is renowned for its performance and tuning potential. With a stock output of around 280 hp, enthusiasts have long sought ways to push this engine far beyond its factory limits. One of the most effective upgrades is the turbocharger. In this article, we will explore how to upgrade the RB26 turbo system using the BorgWarner EFR series to achieve over 800 hp.
Understanding the RB26 Engine
The RB26DETT, a 2.6-liter inline-six engine, is the heart of the Nissan Skyline GT-R. It features a DOHC design and twin turbochargers. This engine is known for its robust construction, making it a favorite among tuners and racers alike.
The Importance of Turbo Upgrades
Upgrading the turbocharger is crucial for increasing horsepower. The stock turbos can limit power due to their size and efficiency. By swapping to a more capable turbo, such as the BorgWarner EFR series, you can unlock significant power gains.
Why Choose BorgWarner EFR Series?
The BorgWarner EFR series offers several advantages:
- Efficiency: The EFR turbos are designed for high efficiency, allowing for quicker spool times and reduced turbo lag.
- Lightweight Materials: Many EFR turbos utilize lightweight materials, which contribute to better performance and quicker response.
- Integrated Wastegate: The built-in wastegate simplifies installation and improves tuning capabilities.
- Advanced Aerodynamics: The turbine and compressor designs are optimized for maximum airflow and performance.
Choosing the Right EFR Turbo
When selecting an EFR turbo, consider your power goals and the supporting modifications needed. Popular options for the RB26 include:
- BorgWarner EFR 7670: A great choice for those looking to achieve around 600-700 hp.
- BorgWarner EFR 8374: Ideal for power levels exceeding 800 hp, offering excellent flow characteristics.
- BorgWarner EFR 9180: Best for extreme builds targeting over 1000 hp.
Supporting Modifications
To safely achieve 800+ hp with an upgraded turbo, several supporting modifications are necessary:
- Fuel System Upgrade: High-flow fuel injectors and an upgraded fuel pump are essential to meet the increased fuel demands.
- ECU Tuning: A proper tune is critical to ensure the engine runs efficiently and safely with the new turbo.
- Intercooler Upgrade: A larger intercooler will help manage intake temperatures, promoting better performance.
- Exhaust System: A high-flow exhaust system will reduce back pressure and improve turbo efficiency.
Installation Process
Installing the BorgWarner EFR turbo on the RB26 requires careful planning and execution. Here are the general steps involved:
- Remove the Stock Turbo: Begin by disconnecting the stock turbos and associated piping.
- Install Turbo Manifold: If necessary, install a compatible turbo manifold that fits the EFR turbo.
- Mount the EFR Turbo: Securely mount the new turbo to the manifold, ensuring all bolts are torqued to specification.
- Connect Piping: Attach all necessary piping for the intake and exhaust.
- Install Wastegate: If using an external wastegate, ensure it is properly plumbed and connected.
- Hook Up Oil Lines: Connect the oil feed and return lines to the turbo.
- Reinstall Intake and Exhaust: Reattach the intake and exhaust systems, ensuring all connections are secure.
Tuning for Performance
After installation, tuning is crucial. A professional tuner should adjust the ECU settings to optimize performance. Key areas to focus on include:
- Air-Fuel Ratio: Ensure the mixture is optimal for the new turbo setup.
- Boost Levels: Set appropriate boost levels to safely achieve desired power outputs.
- Ignition Timing: Adjust timing to prevent knock and maximize power.
Conclusion
Upgrading the RB26 turbo with the BorgWarner EFR series can transform your vehicle into a high-performance machine capable of exceeding 800 hp. With the right components and tuning, enthusiasts can enjoy the thrill of increased power while ensuring reliability and performance.