How to Achieve 620 Whp on Your A90 Supra with Borgwarner Efr 8374 Turbo

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The A90 Toyota Supra has become a favorite among car enthusiasts and tuners alike, particularly for its performance potential. One of the most effective ways to boost the horsepower of your A90 Supra is by upgrading to a BorgWarner EFR 8374 turbocharger. In this article, we will explore the steps required to achieve 620 wheel horsepower (WHP) with this turbo setup.

Understanding the BorgWarner EFR 8374 Turbo

The BorgWarner EFR 8374 turbo is known for its efficiency and performance. It features a compact design that allows for quick spool times and high power output. Here are some key specifications:

  • Compressor Wheel Diameter: 74mm
  • Turbine Wheel Diameter: 62mm
  • Max Horsepower: 800 WHP
  • Integrated Wastegate: Yes

Required Parts and Modifications

To achieve 620 WHP with the EFR 8374, several modifications and supporting parts are essential. Below is a list of components you’ll need:

  • BorgWarner EFR 8374 Turbocharger
  • Upgraded Fuel Injectors (1000cc or larger)
  • High-Pressure Fuel Pump
  • Aftermarket Intercooler
  • Upgraded Exhaust System
  • ECU Tune
  • Boost Controller

Installation Process

Installing the BorgWarner EFR 8374 turbo on your A90 Supra involves several steps. It’s recommended to have a professional mechanic handle the installation if you’re not experienced. Here’s a general overview of the process:

  • Remove the factory turbo and exhaust manifold.
  • Install the EFR 8374 turbocharger onto the manifold.
  • Connect the wastegate actuator and boost control lines.
  • Install upgraded fuel injectors and high-pressure fuel pump.
  • Replace the factory intercooler with the aftermarket unit.
  • Reinstall the exhaust system ensuring proper fitment.
  • Connect all necessary vacuum lines and electrical connectors.

Tuning for Performance

After installation, the next crucial step is tuning the vehicle. A proper ECU tune is vital to ensure that the engine runs efficiently and safely at higher power levels. Here are some tuning options:

  • Custom Dyno Tune: Recommended for optimal performance.
  • ECU Reflash: Can be done using various tuning software.
  • Monitoring Tools: Use wideband O2 sensors and boost gauges for real-time data.

Expected Performance and Reliability

With the BorgWarner EFR 8374 turbo and supporting modifications, you can expect your A90 Supra to achieve around 620 WHP. However, reliability is also a concern at this power level. Here are some tips to maintain reliability:

  • Regularly check and change engine oil.
  • Monitor boost levels to prevent overboosting.
  • Use high-quality fuel to avoid knocking.
  • Keep an eye on engine temperatures during operation.

Conclusion

Achieving 620 WHP on your A90 Supra with a BorgWarner EFR 8374 turbo is an exciting project that can significantly enhance your driving experience. With the right parts, proper installation, and a professional tune, you can unlock the full potential of your vehicle while ensuring reliability and performance.