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The Mazda RX-7 FD is a legend among car enthusiasts, known for its lightweight design and rotary engine. As a proud owner of this iconic vehicle, I embarked on a journey to enhance its performance. The goal was clear: increase the power output from 250 to 330 horsepower. This article details the modifications I made, focusing on the installation of a Turbosmart Blow-Off Valve (BOV) and rotary porting.
The Importance of Performance Upgrades
Performance upgrades are essential for any car enthusiast looking to maximize their vehicle’s potential. For the RX-7, which already boasts a strong foundation, the right modifications can unlock significant power gains. The two key upgrades I chose were a Turbosmart BOV and rotary porting, both of which play crucial roles in enhancing the engine’s efficiency and performance.
Understanding the Turbosmart Blow-Off Valve
The Turbosmart BOV is designed to release excess pressure from the intake system when the throttle is closed. This prevents compressor surge, which can damage the turbocharger and decrease performance. By allowing the turbo to continue spinning freely, the BOV helps maintain boost pressure, resulting in quicker throttle response and improved acceleration.
Installation Process
Installing the Turbosmart BOV on my RX-7 was a straightforward process. Here’s how I did it:
- Gather necessary tools: wrench set, screwdriver, and vacuum hose.
- Remove the factory BOV from the intake system.
- Install the Turbosmart BOV, ensuring a secure fit.
- Connect the vacuum line to the BOV.
- Test for leaks and ensure everything is functioning correctly.
After installation, I noticed an immediate improvement in throttle response and overall driving experience. The sound of the BOV releasing pressure was a satisfying bonus!
Rotary Porting: Unlocking More Power
Rotary porting is a modification that involves altering the intake and exhaust ports of the rotary engine to improve airflow. This process can significantly increase horsepower and torque, making it an ideal upgrade for those looking to push their RX-7 to new limits.
Types of Rotary Porting
There are several types of rotary porting, each offering different benefits. The most common types include:
- Street Porting: A balanced option for daily drivers, providing a moderate increase in power without sacrificing reliability.
- Race Porting: Designed for maximum performance, this option focuses on high RPM power but may reduce low-end torque.
- Bridge Porting: This method enhances airflow significantly and is ideal for racing applications, allowing for high horsepower gains.
For my RX-7, I opted for street porting to ensure a balance between performance and drivability. The process involved disassembling the engine and modifying the ports for optimal airflow.
Porting Process
The rotary porting process was intricate and required precision. Here’s an overview of the steps involved:
- Remove the engine from the vehicle.
- Disassemble the engine components carefully.
- Modify the intake and exhaust ports using specialized tools.
- Reassemble the engine, ensuring all components are properly aligned.
- Reinstall the engine in the RX-7.
After completing the porting process, I was eager to see the results. The increase in horsepower was immediately noticeable, and the engine’s responsiveness was exceptional.
Results: Power Gains and Performance
After completing both the Turbosmart BOV installation and rotary porting, I took my RX-7 to a local dyno to measure the results. The numbers were impressive:
- Before Modifications: 250 horsepower
- After Modifications: 330 horsepower
The increase of 80 horsepower was a testament to the effectiveness of the modifications. The car not only felt faster but also more engaging to drive. The combination of the BOV and porting created a harmonious balance between power and control.
Conclusion: A Worthwhile Investment
In conclusion, upgrading my Mazda RX-7 FD with a Turbosmart BOV and rotary porting was a game-changer. The enhancements provided a significant boost in horsepower, improved throttle response, and an overall exhilarating driving experience. For any RX-7 owner considering performance upgrades, these modifications are highly recommended. They not only enhance the car’s capabilities but also deepen the connection between driver and machine.