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The RB26 engine, renowned for its performance and tuning potential, often sees upgrades to its turbocharging system. Among the popular choices are the HKS GT2835 and the BorgWarner EFR series. In this article, we will compare these two options to help enthusiasts make informed decisions about their turbo upgrades.
Overview of RB26 Turbocharging
The RB26DETT, a 2.6-liter inline-six engine, is famous for its robust design and high power output. Turbocharging plays a crucial role in maximizing the engine’s potential. Upgrading the turbo can lead to significant performance gains, but choosing the right turbo is essential.
HKS GT2835 Turbo
The HKS GT2835 is a popular choice among RB26 enthusiasts. Known for its reliability and performance, this turbo offers a balanced approach to power delivery.
Specifications
- Compressor Wheel Diameter: 62 mm
- Turbine Wheel Diameter: 53 mm
- Max Boost Pressure: 1.2 bar (17.4 psi)
- Power Range: 400-500 HP
Performance Characteristics
The HKS GT2835 is known for its quick spool time and strong mid-range power. It is ideal for street applications as well as moderate track use. The turbo provides a linear power band that appeals to many drivers.
BorgWarner EFR Series
The BorgWarner EFR series brings advanced technology and efficiency into the mix. These turbos are designed for high-performance applications and offer several innovative features.
Specifications
- Compressor Wheel Diameter: 62 mm
- Turbine Wheel Diameter: 54 mm
- Max Boost Pressure: 2.0 bar (29 psi)
- Power Range: 450-600 HP
Performance Characteristics
The BorgWarner EFR turbos are known for their superior efficiency and response. They feature a dual ball bearing design, which contributes to faster spool times and improved overall performance. The EFR series is particularly well-suited for track applications due to its ability to handle high boost levels.
Comparative Analysis
When comparing the HKS GT2835 and the BorgWarner EFR series, several factors come into play. Each turbo has its strengths and weaknesses, making the choice dependent on the intended use of the vehicle.
Spool Time
The HKS GT2835 is known for its quick spool, making it suitable for street driving where low-end torque is essential. In contrast, the BorgWarner EFR series, while still responsive, may take slightly longer to spool due to its larger turbine design.
Power Output
In terms of power output, the BorgWarner EFR series has the upper hand, capable of supporting higher horsepower levels. This makes it a better option for those looking to push their RB26 to its limits on the track.
Efficiency
The BorgWarner EFR turbos are designed with advanced aerodynamics, resulting in higher efficiency at various boost levels. This can translate to better fuel economy and less heat generation, which is crucial for sustained performance.
Installation Considerations
Installation of either turbo requires careful consideration of supporting modifications. Upgrading the turbocharger often necessitates enhancements to the fuel system, intercooler, and exhaust system to realize the full potential of the upgrade.
Supporting Mods for HKS GT2835
- Upgraded Fuel Injectors
- High-Performance Fuel Pump
- Aftermarket Intercooler
- Exhaust System Upgrade
Supporting Mods for BorgWarner EFR
- High-Flow Fuel Injectors
- Upgraded Fuel Pump
- Performance Intercooler
- Full Exhaust System
- ECU Tune
Conclusion
Choosing between the HKS GT2835 and the BorgWarner EFR series ultimately depends on the driver’s goals and preferences. For those seeking a reliable, quick-spooling turbo for street use, the HKS GT2835 is an excellent choice. However, for enthusiasts aiming for maximum power and efficiency on the track, the BorgWarner EFR series stands out as the superior option.
Both turbos have proven themselves in the performance community, and with the right supporting modifications, either can significantly enhance the capabilities of the RB26 engine.