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The 4G63 engine, renowned for its performance and tuning potential, is a favorite among automotive enthusiasts, particularly in the Mitsubishi community. When building a 4G63 to handle 650+ horsepower, it’s crucial to consider supporting modifications that enhance reliability and performance. Below are the top supporting mods to ensure your 4G63 runs safely and efficiently at high power levels.
Upgraded Fuel System
A robust fuel system is essential for maintaining the correct air-fuel ratio at higher power levels. Upgrading your fuel system will help ensure your engine receives the necessary fuel supply.
- Fuel Injectors: Consider high-flow fuel injectors that can provide the increased fuel volume needed for 650+ HP.
- Fuel Pump: Upgrade to a high-performance fuel pump capable of delivering adequate fuel pressure and volume.
- Fuel Pressure Regulator: An adjustable fuel pressure regulator can help maintain optimal pressure for performance.
Enhanced Turbocharger
To achieve 650+ HP, an upgraded turbocharger is necessary. A larger turbo can provide the airflow needed to reach higher power levels while maintaining efficiency.
- Turbo Size: Choose a turbo that balances spool time and top-end power. Consider options like the Holset HX35 or a Garrett GT30.
- Turbo Manifold: An aftermarket manifold can improve exhaust flow and turbo response.
- Wastegate: An external wastegate can help manage boost levels more effectively than internal options.
Improved Intercooler
As power increases, so does the need for effective cooling. An upgraded intercooler helps lower intake temperatures, improving performance and preventing knock.
- Core Size: A larger core size will provide better cooling capabilities.
- End Tanks: Look for intercoolers with efficient end tank designs to minimize pressure drop.
- Pipework: Upgrade to larger diameter piping to reduce restrictions and improve airflow.
Engine Management System
To safely manage the increased power, an aftermarket engine management system is crucial. It allows for precise tuning and control of various engine parameters.
- Standalone ECU: Consider a standalone ECU for complete control over fuel maps, ignition timing, and boost levels.
- Tuning Software: Use reliable tuning software to tailor the engine’s performance to your specific setup.
- Wideband O2 Sensor: Install a wideband O2 sensor to monitor air-fuel ratios accurately.
Stronger Internal Components
To handle the stresses of 650+ HP, upgrading internal engine components is necessary to prevent catastrophic failure.
- Pistons: Consider forged pistons that can withstand higher pressures and temperatures.
- Connecting Rods: Upgrading to forged connecting rods will enhance durability under high power.
- Cylinder Head: Porting and polishing the cylinder head can improve airflow and performance.
Exhaust System Upgrade
A free-flowing exhaust system is essential for maximizing power output. An upgraded exhaust system reduces back pressure and improves turbo efficiency.
- Downpipe: A larger diameter downpipe can significantly improve exhaust flow from the turbo.
- Cat-back System: An aftermarket cat-back exhaust system enhances sound and performance.
- Headers: Upgrading to performance headers can improve exhaust gas evacuation.
Cooling System Enhancements
With increased power, managing engine temperatures becomes critical. Upgrading the cooling system will help maintain optimal operating temperatures.
- Radiator: Upgrade to a high-performance radiator to improve heat dissipation.
- Cooling Fans: Consider electric fans for better airflow and efficiency.
- Thermostat: A lower temperature thermostat can help regulate engine temperatures more effectively.
Conclusion
Building a 4G63 engine to safely handle 650+ HP requires careful consideration of supporting modifications. Upgrading the fuel system, turbocharger, intercooler, engine management, internal components, exhaust system, and cooling system will help ensure reliability and performance. By investing in these supporting mods, you can enjoy the thrill of high horsepower while minimizing the risk of engine failure.