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The first generation Acura NSX is a legendary sports car that has captured the hearts of enthusiasts since its debut in the early 1990s. While the NSX is already known for its impressive performance, many owners seek to unlock even more power and responsiveness through modifications. One of the most effective ways to achieve significant horsepower gains is by upgrading the camshafts and the engine control unit (ECU). In this article, we will explore the steps involved in upgrading these components to achieve a boost of 60+ horsepower.
Understanding Camshafts
Camshafts play a crucial role in the performance of an engine. They control the timing and duration of the valve openings, which directly affects the engine’s airflow and power output. Upgrading to performance camshafts can enhance the NSX’s engine characteristics, allowing for higher RPMs and increased horsepower.
Types of Camshafts
- Stage 1 Camshafts: These offer a mild performance increase with minimal impact on drivability.
- Stage 2 Camshafts: These provide a more aggressive profile, improving power at higher RPMs.
- Stage 3 Camshafts: These are designed for maximum performance, often requiring supporting modifications.
Choosing the right camshaft depends on your performance goals and how you intend to use your NSX. For a balanced approach, Stage 2 camshafts are often recommended for a noticeable increase in horsepower without sacrificing too much drivability.
Upgrading the Camshafts
Upgrading the camshafts in your NSX involves several steps. It’s essential to have a good understanding of engine mechanics or consult with a professional to ensure the installation is done correctly. Here’s a general outline of the process:
- Gather Tools and Parts: You will need performance camshafts, a torque wrench, socket set, and potentially new valve springs.
- Remove Engine Covers: Start by removing the engine covers to access the camshaft area.
- Disconnect Components: Disconnect any components that obstruct access to the camshafts, such as the intake manifold.
- Remove Old Camshafts: Carefully remove the old camshafts, keeping track of any components and bolts.
- Install New Camshafts: Install the new camshafts, ensuring they are properly aligned and torqued to specifications.
- Reassemble Engine: Reinstall all components in reverse order and double-check connections.
After the camshaft installation, it’s crucial to adjust the timing and ensure everything is functioning correctly. This might involve setting the timing belt and verifying that the engine runs smoothly.
ECU Tuning for Maximum Performance
After upgrading the camshafts, the next step is to tune the ECU. The engine control unit manages various aspects of engine performance, including fuel delivery and ignition timing. A proper ECU tune is essential to fully realize the potential of your new camshafts and achieve that 60+ horsepower boost.
Benefits of ECU Tuning
- Optimized Fuel Maps: Ensures the engine receives the right amount of fuel for the increased airflow.
- Improved Throttle Response: Enhances the responsiveness of the accelerator pedal.
- Increased Rev Limit: Allows the engine to rev higher, taking full advantage of the new camshaft profile.
With a proper ECU tune, you can not only increase horsepower but also improve overall drivability. It is recommended to have the ECU tuned by a professional who specializes in performance vehicles, particularly those familiar with the NSX.
Choosing the Right Tuner
Selecting the right tuner for your NSX is critical for achieving the best results. Here are some factors to consider when choosing a tuning specialist:
- Experience with NSX: Look for tuners who have experience specifically with the NSX and its engine.
- Reputation: Check reviews and testimonials from other NSX owners.
- Dyno Testing: Ensure they have access to a dynamometer for accurate tuning results.
Once you have selected a reputable tuner, they will work with you to develop a custom tune that maximizes the performance of your upgraded camshafts. This process may involve multiple runs on the dyno to fine-tune the settings for optimal power and efficiency.
Final Considerations
Upgrading the camshafts and ECU in your first-gen NSX can lead to a significant increase in horsepower and overall performance. However, it is essential to consider the following:
- Supporting Modifications: Depending on the extent of your upgrades, you may need additional modifications such as upgraded exhaust systems or intake systems.
- Regular Maintenance: Increased performance may require more frequent maintenance checks to ensure everything is functioning correctly.
- Insurance Considerations: Modifications may affect your insurance policy, so it’s wise to inform your provider.
By carefully considering these factors and following the steps outlined in this article, you can successfully upgrade your first-gen NSX to achieve a remarkable boost in horsepower, making your driving experience even more exhilarating.