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The Mazda RX-8 has long been celebrated for its unique rotary engine and balanced handling. However, many enthusiasts have begun to explore the potential of swapping the stock engine for a more powerful LS V8. This article delves into the differences between the stock RX-8 and an LS-swapped RX-8, focusing on how the increase to 500+ horsepower transforms the driving experience.
Understanding the RX-8
The RX-8 was produced by Mazda from 2002 to 2012 and is known for its lightweight chassis and rotary engine. The stock engine, a 1.3-liter Renesis rotary, delivers around 238 horsepower and provides a unique driving experience characterized by high revs and a lightweight feel. However, the limitations of the rotary engine in terms of power and torque have led many to consider an LS swap.
What is an LS Swap?
An LS swap involves replacing the stock engine with a General Motors LS series V8 engine. These engines are known for their reliability, power potential, and aftermarket support. The most common LS engines used in swaps include the LS1, LS3, and LS7, which can easily produce over 500 horsepower with minimal modifications.
Performance Comparison
When comparing the stock RX-8 to an LS-swapped RX-8, the performance differences are staggering. Here’s a breakdown of key performance metrics:
- Horsepower: Stock RX-8: 238 hp vs. LS-swapped RX-8: 500+ hp
- Torque: Stock RX-8: 159 lb-ft vs. LS-swapped RX-8: 400+ lb-ft
- 0-60 mph: Stock RX-8: ~6.4 seconds vs. LS-swapped RX-8: ~3.5 seconds
Driving Experience
The driving experience of the RX-8 changes dramatically with an LS swap. Here are some aspects to consider:
- Acceleration: The LS-swapped RX-8 offers explosive acceleration, making it feel like a completely different car.
- Power Delivery: The V8 provides a broad power band, allowing for more accessible and usable power in everyday driving.
- Sound: The deep rumble of a V8 engine enhances the driving experience, providing a more aggressive sound compared to the high-pitched rotary engine.
- Weight Distribution: While the V8 is heavier, the RX-8’s chassis is designed to handle the extra weight, maintaining a good balance.
Handling and Suspension
One of the RX-8’s strong suits is its handling, thanks to its lightweight design and balanced chassis. However, swapping in a heavier LS engine requires some modifications to maintain optimal handling.
- Suspension Upgrades: Upgrading the suspension is crucial to handle the added weight and power.
- Braking System: Enhanced braking components are necessary to cope with the increased speed and power.
- Tires: Wider tires may be required for improved traction and stability.
Cost Considerations
While an LS swap offers significant performance benefits, it is essential to consider the costs involved:
- Engine Cost: The price of an LS engine can vary, but expect to pay between $3,000 and $7,000.
- Labor Costs: Professional installation can add another $1,500 to $5,000, depending on the complexity.
- Additional Parts: Budget for additional parts such as wiring harnesses, mounts, and exhaust systems.
Conclusion
Swapping the stock rotary engine for an LS V8 transforms the RX-8 into a powerhouse, offering a thrilling driving experience with significant performance enhancements. While the swap comes with challenges and costs, the resulting vehicle can provide an exhilarating ride that is hard to match. For enthusiasts looking for more power and performance, an LS swap is a compelling option that redefines the RX-8’s potential.