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The Nissan S14 240SX is a well-known platform among car enthusiasts, particularly for those interested in performance upgrades. One of the most common modifications made to this vehicle is upgrading the intake and exhaust systems. In this article, we will explore the dyno results of these upgrades and the power gains that can be achieved.
Understanding the S14 240SX
The S14 240SX, produced from 1995 to 1998, features a lightweight chassis and a rear-wheel-drive layout, making it a popular choice for drifting and racing. The stock engine, the KA24DE, is a 2.4-liter inline-four that offers a solid foundation for performance enhancements.
Importance of Intake and Exhaust Upgrades
Upgrading the intake and exhaust systems is crucial for improving engine performance. These modifications allow for better airflow, which can lead to increased horsepower and torque. The intake system draws air into the engine, while the exhaust system expels gases, and optimizing both can significantly enhance engine efficiency.
Intake System Upgrades
When upgrading the intake system, enthusiasts often choose aftermarket cold air intakes or short ram intakes. These options provide a less restrictive airflow path compared to the factory setup.
- Cold Air Intake: Typically positioned outside the engine bay, allowing cooler air to enter.
- Short Ram Intake: Positioned closer to the engine, providing quicker throttle response.
Exhaust System Upgrades
For the exhaust system, upgrading to a high-performance cat-back exhaust or headers can significantly improve exhaust flow. This reduction in back pressure allows the engine to breathe better, which can lead to noticeable power gains.
- Cat-Back Exhaust: Replaces the exhaust system from the catalytic converter back, enhancing sound and flow.
- Headers: Improve exhaust scavenging and reduce restrictions at the engine’s exhaust ports.
Dyno Testing Methodology
To assess the power gains from these upgrades, a series of dyno tests were conducted. The testing involved measuring the horsepower and torque before and after the installations of the intake and exhaust systems.
Baseline Measurements
The baseline dyno run was performed on a completely stock S14 240SX. The results provided a reference point for evaluating the effectiveness of the upgrades.
Post-Upgrade Measurements
After installing the new intake and exhaust systems, a second dyno run was conducted. The results highlighted the changes in horsepower and torque, showcasing the improvements made through these modifications.
Dyno Results: Power Gains
The following results were observed from the dyno tests:
- Baseline Horsepower: 140 hp
- Post-Upgrade Horsepower: 165 hp
- Baseline Torque: 150 lb-ft
- Post-Upgrade Torque: 175 lb-ft
The upgrades resulted in a significant power gain of 25 horsepower and 25 lb-ft of torque. This demonstrates the effectiveness of enhancing the intake and exhaust systems on the S14 240SX.
Conclusion
Upgrading the intake and exhaust systems on the Nissan S14 240SX can lead to substantial power gains, as evidenced by the dyno results. These modifications not only improve performance but also enhance the overall driving experience. For enthusiasts looking to maximize their S14’s potential, these upgrades are a worthwhile investment.