Table of Contents
The Mazda RX-7 has long been celebrated for its lightweight design and rotary engine performance. However, the trend of LS swapping has gained traction among enthusiasts looking for more power. In this article, we will explore the differences between a stock RX-7 and an LS-swapped RX-7, particularly focusing on a test drive that showcases a remarkable 400 horsepower gain.
Understanding the RX-7
The RX-7, particularly the third generation (FC and FD), is known for its agile handling and unique rotary engine. While the rotary engine offers a distinct driving experience, many enthusiasts seek to enhance performance through engine swaps.
What is an LS Swap?
An LS swap involves replacing the stock rotary engine with a GM LS-series V8 engine. This modification is popular due to the LS engine’s reliability, availability, and significant power output. The stock RX-7 typically produces around 200 horsepower, while a well-executed LS swap can yield over 400 horsepower.
The Test Drive
To fully appreciate the differences, we conducted a test drive comparing a stock RX-7 to one that has undergone an LS swap. The following sections detail the experiences and performance metrics observed during this test.
Stock RX-7 Performance
The stock RX-7 offers a distinct driving experience characterized by its lightweight chassis and rotary engine’s high-revving nature. Here are some key points from our test drive:
- 0-60 mph in approximately 6.0 seconds.
- Top speed around 140 mph.
- Responsive handling with a balanced feel.
While the stock performance is impressive for its class, it lacks the raw power that many enthusiasts crave.
LS-Swapped RX-7 Performance
The LS-swapped RX-7 transforms the driving experience significantly. With a powerful V8 engine under the hood, the performance metrics are as follows:
- 0-60 mph in approximately 3.5 seconds.
- Top speed exceeding 180 mph.
- Incredible torque delivery throughout the RPM range.
The difference in acceleration and overall power is staggering, making the LS-swapped RX-7 a thrilling ride.
Driving Experience Comparison
Beyond the numbers, the driving experience between the two setups is markedly different. Here are some observations:
- The stock RX-7 feels nimble and light, perfect for tight corners.
- The LS-swapped RX-7 offers brute force and acceleration, ideal for straight-line speed.
- Both cars provide a unique driving experience, but for different reasons.
While the stock RX-7 is fun and engaging, the LS swap delivers a level of power that can be exhilarating on the track.
Cost Considerations
When contemplating an LS swap, it’s essential to consider the costs involved. Here’s a breakdown of potential expenses:
- LS engine purchase: $3,000 – $7,000.
- Transmission and drivetrain modifications: $1,500 – $3,000.
- Installation costs (if not DIY): $1,000 – $2,500.
- Additional parts (wiring harness, cooling system, etc.): $1,000 – $2,000.
While the initial investment for an LS swap can be substantial, the increase in performance may justify the costs for many enthusiasts.
Conclusion
In conclusion, both the stock RX-7 and the LS-swapped RX-7 offer unique advantages. The stock model is an excellent choice for those who value the original rotary experience, while the LS swap provides unmatched power and performance. Ultimately, the decision comes down to personal preference and intended use. Whether you choose to keep it stock or go for the LS swap, the RX-7 remains a legendary vehicle in the automotive world.