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The Nissan S13 240SX is a beloved platform for car enthusiasts, known for its lightweight chassis and rear-wheel-drive layout. One of the most popular modifications among the S13 community is the RB20DET engine swap, which can yield impressive power gains. In this article, we will explore how to maximize power from the RB20DET engine swap in the S13 240SX, aiming for a target of 350 horsepower.
Understanding the RB20DET Engine
The RB20DET is a 2.0-liter inline-six engine that was originally produced by Nissan. It is part of the RB family of engines, which are known for their robustness and tuning potential. With a turbocharger, the RB20DET can produce significant power, making it an excellent choice for performance builds.
Benefits of the RB20DET Swap
Swapping an RB20DET into an S13 240SX offers several advantages:
- Increased Power: The RB20DET provides a solid foundation for power upgrades, easily reaching 350 hp with the right modifications.
- Improved Torque: The engine’s design delivers better torque characteristics, enhancing drivability.
- Aftermarket Support: There is a robust aftermarket for RB engines, providing a variety of performance parts.
Key Modifications to Achieve 350 HP
To reach the goal of 350 hp with the RB20DET in the S13, several key modifications are necessary. Each of these upgrades contributes to the overall performance and reliability of the engine.
1. Upgraded Turbocharger
The stock turbocharger on the RB20DET can restrict power potential. Upgrading to a larger turbo, such as a GT28 or similar, can significantly increase airflow and boost pressure, allowing for higher horsepower output.
2. Fuel System Upgrade
To support increased power, the fuel system must be upgraded. Installing larger fuel injectors and a high-flow fuel pump ensures adequate fuel delivery. Consider using 550cc or larger injectors for optimal performance.
3. Engine Management System
A standalone engine management system (EMS) or an ECU reflash is essential for tuning the engine to its new specifications. This allows for precise control over fuel and ignition timing, maximizing power and efficiency.
4. Exhaust System
An aftermarket exhaust system improves exhaust flow, reducing back pressure. A 3-inch diameter exhaust with a high-flow catalytic converter and muffler will enhance performance and sound.
5. Intercooler Upgrade
Upgrading the intercooler is crucial for managing intake temperatures. A front-mount intercooler can significantly improve cooling efficiency, allowing for more aggressive tuning and reduced chances of knock.
Supporting Modifications
In addition to the key modifications, several supporting upgrades can enhance the overall performance and reliability of the S13 240SX with the RB20DET swap.
1. Suspension Upgrades
With increased power, it’s essential to upgrade the suspension to handle the added performance. Consider installing coilovers and upgraded sway bars to improve handling and stability.
2. Brake System Upgrade
More power means more stopping power is needed. Upgrading to larger brake rotors and high-performance brake pads will improve braking performance and safety.
3. Drivetrain Strengthening
To handle the increased power, consider upgrading the clutch and differential. A stronger clutch will ensure reliable power transfer, while a limited-slip differential will improve traction during acceleration.
Tuning and Dyno Testing
Once all modifications are complete, it’s time for tuning. A professional tuner can optimize the engine’s performance on a dynamometer (dyno), ensuring that the car runs efficiently and safely at the target of 350 hp.
Conclusion
The RB20DET engine swap in an S13 240SX can yield impressive power gains, reaching up to 350 hp with the right modifications. By upgrading the turbocharger, fuel system, and implementing proper tuning, enthusiasts can enjoy a thrilling driving experience. With supporting modifications to suspension, brakes, and drivetrain, the S13 can become a formidable performer on both the street and the track.