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The Mazda RX-8, known for its unique rotary engine and lightweight chassis, has become a popular platform for engine swaps. One of the most sought-after conversions is the LS swap, which involves replacing the rotary engine with a powerful LS V8. This article will explore essential upgrades necessary to make a 450 HP RX-8 LS swap not only powerful but also practical for daily drivability.
Understanding the LS Engine Swap
The LS engine family, originally designed by General Motors, is renowned for its performance, reliability, and aftermarket support. Swapping an LS engine into an RX-8 can significantly enhance its power and torque, transforming the driving experience. However, to ensure that the vehicle remains suitable for daily use, several upgrades are necessary.
Essential Upgrades for Daily Drivability
1. Engine Mounts
Custom engine mounts are crucial for securing the LS engine in the RX-8 chassis. High-quality mounts reduce vibrations and ensure proper alignment, which is vital for a smooth driving experience.
2. Transmission Swap
The RX-8’s original transmission is not compatible with the LS engine. A suitable transmission, such as the T56, should be chosen for its strength and ability to handle the increased power. Additionally, a transmission adapter kit may be required for a proper fit.
3. Cooling System Upgrade
With the LS engine producing significantly more heat than the rotary, an upgraded cooling system is essential. Consider installing a larger radiator, high-flow water pump, and upgraded fans to maintain optimal engine temperatures.
4. Fuel System Enhancements
The LS engine requires more fuel than the stock rotary engine. Upgrading the fuel pump, injectors, and lines is necessary to ensure adequate fuel delivery for the increased power output.
5. Exhaust System
A performance exhaust system will not only help the LS engine breathe better but also enhance the sound of the vehicle. Look for a system designed specifically for the RX-8 LS swap to ensure proper fitment and performance.
6. Suspension Upgrades
To handle the additional weight and power of the LS engine, upgrading the suspension is vital. Consider installing coilovers, upgraded sway bars, and performance bushings to improve handling and stability.
7. Brake System Improvements
With the increase in power, the stock brake system may not be sufficient. Upgrading to larger rotors, calipers, and high-performance brake pads will enhance stopping power and safety.
8. Tuning and ECU Management
After completing the swap and upgrades, proper tuning is essential to optimize performance and drivability. A standalone ECU or a reprogrammed stock ECU can help manage the LS engine’s performance characteristics effectively.
Final Thoughts
Building a 450 HP RX-8 LS swap can be an exciting project that yields impressive results. By focusing on these essential upgrades, you can ensure that your swapped RX-8 remains reliable and enjoyable for daily driving. Always remember to consult with professionals and experienced builders to guide you through the process for the best results.