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The 4G63 engine, known for its performance and tuning potential, is a favorite among car enthusiasts looking to achieve high horsepower builds. When aiming for 400+ horsepower, it’s essential to incorporate supporting modifications that enhance reliability and performance. This article outlines the critical supporting mods necessary for a reliable 4G63 build.
Understanding the 4G63 Engine
The 4G63 is a turbocharged inline-4 engine produced by Mitsubishi. It has a strong aftermarket support and is known for its durability when properly tuned. To reach and maintain 400+ horsepower, several supporting modifications are crucial.
Essential Supporting Mods
- Upgraded Turbocharger: A larger turbo is necessary to provide the airflow needed for higher horsepower.
- Intercooler: An efficient intercooler helps to reduce intake temperatures, improving performance and reliability.
- Fuel System Upgrade: High-flow fuel injectors and a larger fuel pump ensure adequate fuel delivery.
- ECU Tuning: A proper tune is essential to optimize performance and ensure engine safety.
- Exhaust System: A free-flowing exhaust reduces back pressure and enhances turbo efficiency.
- Intake System: A high-performance intake system improves airflow into the engine.
- Engine Internals: Upgrading pistons and connecting rods can provide the strength needed for high power levels.
- Cooling System: An upgraded radiator and oil cooler help maintain optimal engine temperatures.
Detailed Modifications
Upgraded Turbocharger
For 400+ horsepower, a turbocharger capable of supporting that power level is critical. Options like the Holset HX35 or a GT30 series turbo can provide the necessary boost. Ensure that the turbo is paired with the right manifold and downpipe to maximize performance.
Intercooler
An upgraded intercooler, such as a front-mount intercooler, is vital for cooling the compressed air from the turbo. This helps to prevent knock and allows for more aggressive tuning. Look for intercoolers with a large core and efficient end tanks.
Fuel System Upgrade
To support the increased power levels, the fuel system must be upgraded. High-flow fuel injectors (such as 750cc or larger) and a high-performance fuel pump are necessary to ensure that the engine receives enough fuel under boost conditions.
ECU Tuning
A proper ECU tune is essential for maximizing performance and ensuring engine safety. Consider using aftermarket ECUs or tuning software that allows for fine-tuning of fuel maps, ignition timing, and boost control.
Exhaust System
A high-performance exhaust system reduces back pressure and helps the turbo spool faster. Look for options with larger diameter piping and less restrictive mufflers to improve exhaust flow.
Intake System
An upgraded intake system enhances airflow to the engine. Cold air intakes or short ram intakes can significantly improve throttle response and power output.
Engine Internals
For builds pushing the limits of the 4G63, upgrading engine internals is advisable. Forged pistons and stronger connecting rods can handle higher boost levels and reduce the risk of engine failure.
Cooling System
Maintaining optimal engine temperatures is crucial for reliability. An upgraded radiator and oil cooler can help dissipate heat more effectively, ensuring that the engine operates within safe temperature ranges.
Conclusion
Achieving 400+ horsepower from a 4G63 engine requires careful consideration of supporting modifications. By upgrading critical components such as the turbocharger, fuel system, and cooling system, enthusiasts can build a reliable and powerful engine capable of handling the demands of high-performance driving.