Turbocharging the 4g63: Selecting the Right Turbo, Intercooler, and Fuel System for 500+ Hp

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The 4G63 engine, renowned for its performance in the Mitsubishi Eclipse and other models, has become a popular choice for enthusiasts looking to achieve high horsepower figures. To reach the coveted 500+ horsepower mark, careful selection of turbochargers, intercoolers, and fuel systems is crucial. This guide will help you navigate the options available to maximize the potential of your 4G63 engine.

Selecting the Right Turbocharger

Choosing the right turbocharger is one of the most critical decisions in the turbocharging process. The turbo must match your performance goals, engine characteristics, and driving style. Here are some factors to consider:

  • Turbo Size: A larger turbo can produce more power but may suffer from lag. Smaller turbos spool faster but may limit peak power.
  • Compressor and Turbine Design: Advanced designs can improve efficiency and reduce lag.
  • Boost Pressure: Determine the boost levels you want to run; higher boost requires stronger engine components.
  • Brand and Model: Popular choices for the 4G63 include the Garrett GT series and the BorgWarner EFR series.
  • Garrett GT30R: Offers a good balance of spool time and power.
  • BorgWarner EFR 7670: Known for quick spool and high efficiency.
  • HKS GT-RS: A great option for those seeking a blend of performance and reliability.

Each turbocharger has its own characteristics, so it’s essential to match it with your engine setup and intended use.

Choosing the Right Intercooler

An efficient intercooler is vital for cooling the compressed air from the turbocharger, which improves performance and reduces the risk of detonation. Here’s what to look for:

  • Core Size: A larger core can provide better cooling but may require more space.
  • Type: Consider whether a front-mount or top-mount intercooler fits your setup better.
  • Material: Aluminum is commonly used due to its lightweight and effective heat transfer properties.
  • ETS Front Mount Intercooler: Known for high efficiency and low pressure drop.
  • Greddy Type RS: A compact option that provides excellent cooling performance.
  • VRSF Intercooler: Offers a good balance of price and performance.

When selecting an intercooler, ensure it can handle the power levels you aim to achieve without causing excessive pressure loss.

Fuel System Requirements

To support 500+ horsepower, your fuel system must be robust and capable of delivering the necessary fuel volume and pressure. Consider the following components:

  • Fuel Pump: An upgraded fuel pump is essential. Look for pumps rated for at least 400-500 liters per hour.
  • Fuel Injectors: High-flow injectors (1000cc or more) are recommended to ensure adequate fuel delivery.
  • Fuel Pressure Regulator: A reliable regulator helps maintain consistent fuel pressure.
  • Walbro 450LPH Fuel Pump: A popular choice for high horsepower builds.
  • Injector Dynamics 1000cc Injectors: Known for their reliability and performance.
  • AEM Adjustable Fuel Pressure Regulator: Offers precise control over fuel pressure.

It’s crucial to ensure that all components in your fuel system are compatible and can handle the demands of high horsepower applications.

Tuning for Maximum Performance

After upgrading your turbocharger, intercooler, and fuel system, proper tuning is essential to achieve the desired power levels. Consider the following:

  • ECU Tuning: A standalone or re-flashed ECU is necessary to optimize fuel maps and ignition timing.
  • Dyno Tuning: A professional dyno session can help fine-tune your setup for maximum performance and reliability.
  • Monitoring Tools: Invest in gauges or a data logging system to monitor critical parameters like air/fuel ratio and boost pressure.

Proper tuning not only maximizes performance but also ensures the longevity of your engine components.

Conclusion

Turbocharging the 4G63 engine to achieve 500+ horsepower is an exciting challenge that requires careful selection of components. By choosing the right turbocharger, intercooler, and fuel system, and ensuring proper tuning, you can unlock the full potential of your engine. Remember to always prioritize quality and compatibility in your upgrades to achieve the best results.