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The 4G63 engine, a turbocharged inline-four, has gained a reputation in the automotive world for its performance potential. Many enthusiasts have successfully pushed this engine to achieve over 550 horsepower through careful modifications, particularly focusing on forced induction systems, custom intercoolers, and exhaust setups.
Understanding the 4G63 Engine
The 4G63 engine was originally designed by Mitsubishi Motors and has been a favorite among tuners for its robust design and tuning capabilities. It features a DOHC (Dual Overhead Cam) configuration and is known for its ability to handle high levels of boost, making it an ideal candidate for forced induction modifications.
Forced Induction Fundamentals
Forced induction involves using a turbocharger or supercharger to increase the amount of air entering the engine, allowing for more fuel to be burned and thus increasing power output. The 4G63 can be significantly enhanced through the following methods:
- Upgrading the turbocharger
- Optimizing the air intake system
- Enhancing fuel delivery
Upgrading the Turbocharger
The stock turbocharger on the 4G63 can be limiting for power goals above 550 hp. Upgrading to a larger turbo, such as a GT35 or similar, can provide the necessary airflow. It’s essential to select a turbo that matches your power goals and engine setup.
Optimizing the Air Intake System
A high-performance air intake system is crucial for maximizing airflow to the engine. Custom intake manifolds and larger throttle bodies can help increase the volume of air entering the engine, improving response and power output.
Custom Intercoolers
Intercoolers play a vital role in forced induction systems by cooling the compressed air from the turbocharger before it enters the engine. Custom intercoolers can significantly improve performance by reducing intake temperatures, which allows for denser air and more efficient combustion.
Choosing the Right Intercooler
When selecting a custom intercooler for the 4G63, consider the following:
- Core size and thickness
- End tank design
- Material (aluminum is preferred for its weight and heat dissipation)
Intercooler Piping
Custom piping is often required to connect the intercooler to the turbocharger and intake manifold. Ensure that the piping is designed for optimal airflow and minimal pressure drop. Using silicone couplers can help accommodate movement and vibrations.
Exhaust System Upgrades
An efficient exhaust system is crucial for maximizing the performance of the 4G63 engine. Upgrading the exhaust components can reduce back pressure and improve turbo spool time, leading to better overall performance.
Choosing the Right Exhaust Components
Key components to consider when upgrading the exhaust system include:
- High-flow catalytic converter
- Performance exhaust manifold
- Cat-back exhaust system
Exhaust Sizing
Proper exhaust sizing is essential to avoid restrictions. A 3-inch exhaust system is often recommended for high-powered setups to ensure optimal flow and performance.
Tuning for Performance
After upgrading the forced induction system, intercoolers, and exhaust components, proper tuning is critical to achieving the desired horsepower. A professional tune will optimize fuel maps, ignition timing, and boost levels to ensure reliability and performance.
Choosing a Tuner
Selecting the right tuner for your 4G63 is vital. Look for tuners with experience in Mitsubishi engines and forced induction setups. They should be familiar with the specific requirements and challenges of tuning for high horsepower levels.
Conclusion
Achieving 550+ horsepower from the 4G63 engine is an exciting challenge for automotive enthusiasts. By focusing on forced induction, custom intercoolers, and exhaust upgrades, along with proper tuning, you can unlock the full potential of this legendary engine. With the right modifications and expertise, the 4G63 can deliver exhilarating performance on the street or track.