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The Mitsubishi Eclipse equipped with the 4G63 engine is a beloved platform for enthusiasts seeking performance upgrades. Turbocharging this engine can yield impressive horsepower gains, especially when combined with the right components. In this article, we will explore the benefits of upgrading to a Garrett GT3076R turbocharger and the supporting modifications necessary to achieve over 500 horsepower.
Understanding the 4G63 Engine
The 4G63 engine is a 2.0-liter inline-four engine that has gained a reputation for its robustness and tuning potential. Originally designed for the Mitsubishi Lancer Evolution, the engine found its way into the Eclipse, making it a popular choice among tuners.
Key Features of the 4G63
- Iron block and aluminum DOHC head
- Strong internals suitable for high horsepower builds
- Turbocharged from the factory, allowing for easier upgrades
Choosing the Right Turbo: Garrett GT3076R
The Garrett GT3076R turbocharger is a popular choice for those looking to push the limits of the 4G63 engine. Known for its reliability and performance, the GT3076R can support well over 500 horsepower with the right supporting modifications.
Benefits of the Garrett GT3076R
- High flow capabilities allowing for significant horsepower gains
- Responsive spool characteristics for improved throttle response
- Durable construction designed for high-performance applications
Supporting Upgrades for Maximum Performance
To fully utilize the capabilities of the GT3076R turbocharger, several supporting upgrades are necessary. These modifications will ensure that the engine can handle the increased power and maintain reliability.
Fuel System Upgrades
Upgrading the fuel system is crucial when increasing horsepower. A high-flow fuel pump and larger fuel injectors will be necessary to provide adequate fuel to the engine.
- Install a high-performance fuel pump (e.g., Walbro 255)
- Upgrade to larger fuel injectors (e.g., 850cc or larger)
- Consider an adjustable fuel pressure regulator
Engine Management System
A proper engine management system is vital for tuning the 4G63 to work with the new turbo setup. This will allow for precise adjustments to fuel and ignition timing.
- Install an aftermarket ECU (e.g., AEM, Haltech)
- Utilize a wideband O2 sensor for accurate air-fuel ratio monitoring
- Consider a dyno tune to maximize performance and reliability
Exhaust System Upgrades
To effectively expel exhaust gases from the engine, an upgraded exhaust system is necessary. A larger diameter downpipe and cat-back exhaust will help improve flow and reduce backpressure.
- Install a high-flow downpipe
- Upgrade to a performance cat-back exhaust system
- Consider a test pipe or high-flow catalytic converter for improved flow
Intercooler and Piping
With the increase in boost pressure, an efficient intercooler is essential to keep intake temperatures low. Upgraded intercooler piping will also help minimize pressure drops.
- Install a front-mount intercooler (FMIC)
- Upgrade to larger diameter intercooler piping
- Ensure proper routing to minimize bends and kinks
Internal Engine Upgrades
For those looking to push beyond 500 horsepower, internal engine upgrades may be necessary. Strengthening the engine internals will help ensure longevity and reliability under high boost conditions.
- Upgrade to forged pistons and rods
- Consider a higher performance camshaft
- Install a stronger head gasket and ARP head studs
Conclusion
Turbocharging your 4G63 Eclipse with a Garrett GT3076R turbocharger can unlock impressive performance potential. By investing in the right supporting upgrades, you can achieve over 500 horsepower while maintaining reliability. Whether you are a seasoned enthusiast or a newcomer to the tuning scene, these modifications will help you maximize your Eclipse’s performance.