Swapping a Nissan RB engine into a Nissan 200SX represents the pinnacle of modification for car enthusiasts who crave a perfect balance of power, reliability, and prestige. This engine swap is more than just a mechanical upgrade; it’s a transformation that elevates the performance and status of the 200SX to a whole new level.

The Nissan RB series is legendary in the automotive world, thanks to its smooth inline-six configuration, exceptional build quality, and a long history of success in motorsports and tuning culture. Originally powering iconic vehicles like the Nissan Skyline GT-R, the RB engine has developed a cult following for its ability to produce jaw-dropping power figures while maintaining reliability. The 200SX, with its lightweight rear-wheel-drive platform, is the perfect candidate to house such a potent powerplant.

The appeal of this swap lies in its ability to unlock the true potential of the 200SX chassis, transforming it from a capable sport compact into a high-performance monster. By installing an RB engine, you’re not just adding horsepower; you’re introducing a piece of Japanese automotive heritage into your build.

Why the RB Engine is a Game-Changer

The RB series engines were designed with motorsports in mind, and their over-engineered nature means they can handle significant amounts of power without major upgrades. In stock form, an RB25DET or RB26DETT already delivers a thrilling driving experience, but with relatively minor modifications such as a larger turbo, advanced ECU tuning, or upgraded internals, these engines can reach power outputs exceeding 600 horsepower. This makes them a popular choice for car enthusiasts looking to dominate on the street, strip, or track.

Additionally, the RB’s inline-six layout offers a unique driving experience. The engine delivers smooth power delivery, higher torque, and a sound that’s music to any car enthusiast's ears. It’s a perfect match for the Nissan 200SX, a car that is already celebrated for its handling and balance.

Best Engine Swaps: What to Expect in This Guide

For many, the idea of undertaking a full RB engine swap can seem daunting due to its technical demands and the variety of components required. This guide is here to demystify the process, covering everything from:

A breakdown of the essential components and modifications needed for the swap.
Steps to prepare the 200SX chassis for the RB engine.
Tips to overcome common challenges, such as wiring integration and managing the engine’s heat output.
A look at the performance benefits and tuning potential this swap offers.

Whether you’re a seasoned builder or someone embarking on their first engine swap project, this guide will provide you with the knowledge and insights needed to turn your 200SX into a true powerhouse equipped with one of the most revered engines in automotive history.

The RB swap isn’t just about bolting in a new engine—it’s about creating a car that stands out in a sea of ordinary builds. For those who appreciate the art of engineering and performance, the RB-engineered 200SX is an experience like no other.

Best Engine Swaps: Why Choose the Nissan RB Engine?

The Nissan RB series engines, particularly the RB20, RB25, and RB26, are among the most iconic inline-six engines in automotive history. Here’s why they’re an ideal choice for the Nissan 200SX:

1. Proven Performance

The RB engines were developed for power and durability, offering exceptional performance potential even in stock form. With turbocharging as a standard feature on most RB models, enthusiasts can easily extract power outputs ranging from 250 to 600+ horsepower, depending on the setup.

2. Strong Aftermarket Support

From upgraded turbochargers to forged internals and advanced ECU tuning solutions, the RB series benefits from a massive aftermarket community. This ensures that parts are readily available and customizable for specific builds.

3. Racing Pedigree

The RB engine’s legacy is tied to the Nissan Skyline GT-R, making it a symbol of JDM performance. Swapping an RB into a 200SX instantly elevates the car’s status among enthusiasts.

Best Engine Swaps: Understanding the Nissan 200SX Platform

The Nissan 200SX, particularly the S13 and S14 models, is an excellent candidate for engine swaps due to its lightweight chassis, balanced rear-wheel-drive layout, and spacious engine bay. While the stock CA18DET or SR20DET engines provide a good starting point, upgrading to an RB engine transforms the car into a formidable performer on the street or track.

Key Components for the RB Engine Swap

Swapping an RB engine into a 200SX requires a variety of components to ensure proper fitment, functionality, and performance. Below are the essentials to consider:

Engine Mounts and Brackets

Custom engine mounts are required to fit the longer inline-six RB engine into the 200SX engine bay.
Aftermarket kits are available for seamless installation, ensuring proper alignment and stability.

Transmission Compatibility

The RB engines often pair with the RB25DET transmission or a modified RB26 gearbox.
Alternatively, you can use the 200SX’s existing transmission with an adapter plate, although this may limit power-handling capacity.

ECU and Wiring Harness

An upgraded ECU is essential to manage the RB’s fuel and ignition systems. Options include standalone ECUs like the Haltech or Link.
Wiring harnesses may need to be custom-fabricated or purchased pre-made for RB-to-200SX swaps.

Cooling and Intercooling Systems

The larger RB engine generates more heat, so upgrading the radiator and installing a front-mount intercooler (FMIC) is crucial.
Consider adding an oil cooler for additional thermal management.

Step-by-Step Guide to the RB Engine Swap

Preparing the 200SX Chassis

Remove the Original Engine: Begin by removing the stock engine, transmission, and supporting components.
Clean and Inspect the Engine Bay: Ensure the bay is free from rust and properly prepped for the larger RB engine.
Upgrade the Suspension and Brakes: The added weight and power of the RB engine require stiffer springs, upgraded shocks, and enhanced braking systems.

Installing the RB Engine

Fit Engine Mounts: Install custom mounts and test-fit the RB engine into the bay, ensuring proper clearance.
Connect the Transmission: Pair the engine with the transmission and install it into the car.
Integrate the Wiring Harness: Connect the ECU and wiring harness, making sure all sensors and electronics are properly configured.

Finalizing the Swap

Install Cooling Components: Add the radiator, intercooler, and oil cooler to ensure optimal engine performance.
Tune the Engine: Calibrate the ECU for your specific setup, optimizing for power, efficiency, and reliability.
Test Drive: Conduct a thorough test drive to check for leaks, misfires, or other potential issues.

Performance Benefits of the RB Engine Swap

Swapping an RB engine into a 200SX delivers transformative performance benefits:

Increased Horsepower: Even a stock RB25DET offers around 250 hp, with the potential for 400+ hp with minor upgrades.
Enhanced Torque: The inline-six design provides smoother power delivery and stronger torque compared to four-cylinder alternatives.
Track-Ready Durability: The RB engine’s robust internals handle higher boost levels and extended track sessions with ease.

Common Challenges and Solutions

1. Space Constraints

The RB engine’s inline-six design makes it longer than the stock 200SX engines, requiring careful placement and mount adjustments.

Solution: Use a pre-fabricated swap kit that includes custom mounts and cross members for the 200SX chassis.

2. Wiring Complexity

Integrating the RB engine’s wiring harness with the 200SX electrical system can be challenging.

Solution: Opt for a pre-made wiring harness or consult a professional tuner to ensure seamless integration.

3. Cooling Issues

RB engines produce significant heat, particularly under boost.

Solution: Install a high-performance radiator, intercooler, and oil cooler to manage engine temperatures.

Popular Nissan RB Engine Models for the 200SX

RB20DET: The most affordable RB option, offering decent power for lighter builds.
RB25DET: A balanced choice with more power and better internals than the RB20DET.
RB26DETT: The ultimate RB engine, delivering massive power potential but requiring significant modifications.