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The Nissan 240SX has long been a favorite among car enthusiasts, especially for those looking to swap in a more powerful engine. One of the most popular swaps is the Toyota 2JZ, known for its incredible tuning potential. In this article, we will explore how to upgrade the turbo and fuel system on a 2JZ swapped 240SX to achieve an impressive 650 horsepower, perfect for track use.
Understanding the 2JZ Engine
The 2JZ engine, particularly the 2JZ-GTE variant, is a legendary inline-six engine that was originally found in the Toyota Supra. With a robust design and a strong aftermarket support, the 2JZ is capable of handling significant power upgrades. Before diving into upgrades, it’s essential to understand the engine’s capabilities and limitations.
Key Features of the 2JZ-GTE
- Strong iron block and aluminum head
- Dual overhead cam design
- Sequential twin-turbo setup (in stock form)
- Robust internals capable of handling high horsepower
Turbocharger Upgrade Options
To reach 650 horsepower, upgrading the turbocharger is a crucial step. The stock twin turbos can be limiting, so many enthusiasts opt for a single turbo setup. This not only simplifies the system but also improves response and power delivery.
Choosing the Right Turbo
When selecting a turbo, consider factors such as size, efficiency, and spool time. Popular options for the 2JZ include:
- Garrett GT35R
- Precision 6266
- Holset HX35
Supporting Modifications
Upgrading the turbo alone isn’t enough. You will also need to consider supporting modifications to ensure the engine runs smoothly and reliably at higher power levels.
- Upgraded intercooler for better charge air cooling
- High-flow exhaust manifold
- Boost controller to manage turbo pressure
Fuel System Upgrades
With increased airflow from the upgraded turbo, the fuel system must also be enhanced to meet the demands of higher horsepower. This includes upgrading the fuel pump, injectors, and fuel lines.
Upgrading the Fuel Pump
A high-performance fuel pump is essential for delivering the necessary fuel volume and pressure. Options include:
- Walbro 450lph fuel pump
- DeatschWerks DW300
Choosing the Right Injectors
To support 650 horsepower, larger fuel injectors are necessary. Look for options that provide sufficient flow rate, such as:
- 1000cc injectors for high horsepower builds
- Flex-fuel compatible injectors for E85 use
Tuning for Performance
After upgrading the turbo and fuel system, proper tuning is critical to ensure the engine runs efficiently and reliably. A standalone engine management system or a piggyback system can be used for tuning the 2JZ.
Popular Tuning Solutions
- Haltech Elite 1500
- AEM Infinity
- MoTeC M1
Final Considerations
Upgrading a 2JZ swapped 240SX to 650 horsepower is an exciting project that requires careful planning and execution. From selecting the right turbo to ensuring the fuel system can handle the increased demands, each step is crucial for achieving a reliable and powerful track car.
As you embark on this journey, remember to prioritize safety and reliability. With the right upgrades and tuning, your 240SX can become a formidable contender on the track.