Reviving the Rotary: An In-Depth Guide to RX-8 LS Swaps

Joann Russell 16 September, 202316 September, 2023 4L60E, Components, Engine, Guide, LS, LS6, Performance, Rotary, RX-8, Swaps, Tremec

The Mazda RX-8, known for its rotary engine, unique design, and engaging driving experience, holds a special place in the automotive world. However, the challenges associated with rotary engines have led some enthusiasts to explore alternative powerplants. One such alternative is the RX8 LS swap, a modification that replaces the original rotary engine with a General Motors (GM) LS-series engine. In this comprehensive guide, we’ll delve into the world of RX-8 LS swaps, explaining what it is, its components, and why it’s gaining popularity among RX-8 owners.

What Is an RX-8 LS Swap?

The Core Concept

An RX-8 LS swap involves the process of removing the original rotary engine from a Mazda RX-8 and replacing it with a GM LS-series engine. The LS engine family is celebrated for its power, reliability, and adaptability, making it an appealing choice for enthusiasts seeking to enhance the RX-8’s performance while addressing the challenges associated with rotary engines.

Components of an RX-8 LS Swap

1. LS Engine

At the heart of an RX-8 LS swap is the LS engine itself. LS engines come in various displacements and configurations, allowing enthusiasts to choose the level of power and performance that suits their preferences.

2. Transmission

To harness the full potential of the LS engine’s power, a compatible transmission is crucial. Many enthusiasts opt for transmissions like the Tremec T56 or the 4L60E for their reliability and performance capabilities.

3. Motor Mounts

Motor mounts are essential for securing the LS engine in the RX-8’s engine bay, ensuring proper alignment and stability for a successful swap.

4. Exhaust System

Modifying or replacing the exhaust system is often necessary to accommodate the LS engine’s layout. Proper exhaust routing is crucial for optimal performance and sound.

5. Wiring Harness

The RX-8’s existing wiring harness may need modification or replacement to integrate with the LS engine’s electronic systems. LS-specific wiring harnesses simplify this process.

6. Cooling System

To prevent overheating, a compatible cooling system is necessary, which may include a new radiator, hoses, and fans to ensure efficient engine cooling.

Why RX-8 LS Swaps Are Gaining Popularity

1. Enhanced Performance

The primary reason for the popularity of RX-8 LS swaps is the significant performance boost these engines offer. LS engines can be modified and tuned for substantial horsepower and torque gains, providing a thrilling driving experience.

2. Reliability

LS engines are renowned for their reliability. Their robust design and engineering make them dependable even under demanding conditions, addressing the reliability concerns often associated with rotary engines.

3. Availability of Parts

Parts and aftermarket support for LS engines are abundant, making it easier and more cost-effective for enthusiasts to undertake RX-8 LS swap projects.

4. Improved Fuel Efficiency

Compared to rotary engines, LS engines typically offer better fuel efficiency, making them a practical choice for daily driving.

How to Begin Your RX-8 LS Swap Project

1. Vehicle Selection

Start by acquiring a Mazda RX-8 in good condition. The year, trim level, and specific model are personal preferences.

2. Engine Selection

Choose the LS engine variant that aligns with your performance goals and budget. Popular choices include the LS1, LS2, LS3, and LS6 engines.

3. RX-8 LS Swap Kit

Invest in a comprehensive RX-8 LS swap kit tailored for your specific RX-8 model. These kits typically include motor mounts, headers, wiring harnesses, and other essential components.

4. Professional Assistance

While some experienced DIY enthusiasts successfully complete RX-8 LS swap projects, professional assistance is advisable, especially if you’re new to engine swaps.

5. Tuning and Testing

After the LS engine is successfully installed, ensure proper tuning and testing to optimize performance, fuel efficiency, and drivability.

An RX8 LS swap is a transformative modification that breathes new life into the Mazda RX-8, addressing the challenges associated with rotary engines while enhancing performance and reliability. The growing popularity of RX8 LS swap is fueled by the desire for improved performance, reliability, and the availability of parts and aftermarket support for LS engines. If you’re considering an RX-8 LS swap for your beloved RX-8, you’re embarking on an exciting journey that can elevate your driving experience and provide a fresh perspective on this unique sports car, all while preserving its distinctive design and driving dynamics.