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The 4G63 engine is a legendary powerplant found in various Mitsubishi models, known for its potential to produce impressive horsepower figures. For enthusiasts looking to push their 4G63 street and drag car to 550+ hp, several upgrades can significantly enhance performance. Below are some of the best upgrades to consider for achieving this goal.
Engine Internals
To handle the increased power, upgrading the engine internals is crucial. Here are some key components to consider:
- Forged Pistons: Upgrading to forged pistons will improve durability and withstand higher boost levels.
- Connecting Rods: Stronger connecting rods are essential to handle the stress of increased horsepower.
- Cylinder Head Work: Porting and polishing the cylinder head can improve airflow, enhancing performance.
- Upgraded Camshafts: Performance camshafts can optimize the engine’s power band for better output.
Turbocharger Upgrades
The turbocharger is the heart of any 4G63 build, especially when targeting 550+ hp. Consider these upgrades:
- Big Turbo: Upgrading to a larger turbo, such as a GT30 or GT35, will allow for greater airflow and power.
- Turbo Manifold: A high-performance manifold can improve turbo response and reduce lag.
- External Wastegate: An external wastegate can help manage boost levels more effectively.
Fuel System Upgrades
To support the increased power, a robust fuel system is essential. Here are some upgrades to consider:
- High-Flow Fuel Pump: A fuel pump capable of delivering sufficient fuel for high horsepower is vital.
- Upgraded Fuel Injectors: Larger injectors will ensure the engine receives enough fuel under boost.
- Fuel Pressure Regulator: An adjustable regulator can help maintain optimal fuel pressure.
Cooling System Enhancements
High horsepower can generate a lot of heat, so an efficient cooling system is critical. Consider these upgrades:
- Upgraded Intercooler: A larger intercooler will help reduce intake temperatures, improving performance.
- Performance Radiator: An upgraded radiator can enhance cooling efficiency, especially during intense driving.
- Oil Cooler: Adding an oil cooler can help maintain optimal oil temperatures under heavy loads.
Exhaust System Modifications
An efficient exhaust system is essential for maximizing horsepower. Here are some modifications to consider:
- High-Performance Exhaust Manifold: Upgrading to a performance manifold can improve exhaust flow.
- Full Exhaust System: A 3-inch or larger exhaust system will reduce back pressure and enhance power.
- High-Flow Catalytic Converter: A high-flow cat can help maintain emissions compliance while improving flow.
Tuning and Engine Management
Proper tuning is crucial for maximizing performance and reliability. Consider these options:
- Standalone Engine Management System: A standalone system allows for precise tuning and control over engine parameters.
- Tuning Software: Using software like ECU Flash can help optimize performance and adjust settings as needed.
- Dyno Tuning: Professional dyno tuning will ensure the car runs efficiently and safely at high power levels.
Suspension and Drivetrain Upgrades
To handle the increased power, upgrading the suspension and drivetrain is essential for improved traction and handling:
- Performance Coilovers: Upgrading to coilovers will enhance handling and allow for adjustable ride height.
- Upgraded Differential: A limited-slip differential can help improve traction during launches.
- Stronger Axles: Upgrading to stronger axles will help handle the increased power without failure.
Conclusion
Building a 4G63 street and drag car with 550+ hp requires a thoughtful approach to upgrades. By focusing on engine internals, turbocharger enhancements, fuel system improvements, cooling upgrades, exhaust modifications, tuning, and suspension/drivetrain enhancements, you can achieve your horsepower goals while maintaining reliability. Always remember to prioritize quality parts and professional installation to ensure the best results.