OEM Honda NA1 NSX-R 5 Speed Short Gear Set

Description

Enhance Your NSX Performance with Japanese Gear Ratios

Optimize your NSX’s acceleration with Japanese gear ratios, a shift that drastically enhances performance compared to the North American model. The Japanese NSX-R gear ratios are finely tuned to position your engine within its powerband more effectively than the standard US gearing. This upgrade is particularly advantageous for spirited driving and track use, delivering substantial improvements to your NSX’s capabilities.

For North American or European NSXs (1991-1993), our dropdown menu offers all essential components needed to transition your Acura USDM gears to the performance-boosting Japanese NSX-R gears. By selecting the available options, you’ll access everything required for this conversion.

Shorter gear ratios offer a multitude of benefits:

1. Improved Acceleration: Experience quicker acceleration as shorter gear ratios deliver increased torque to the wheels, enabling higher engine revs.
2. Enhanced Responsiveness: Enjoy a more agile and nimble driving experience with quicker responses to accelerator inputs.
3. Superior High-Speed Performance: Benefit from maintaining higher speeds in upper gears, ideal for high-performance driving and track usage.
4. Enhanced Fuel Efficiency: Shorter gear ratios help maintain lower RPMs during highway driving, potentially improving fuel efficiency.

However, it’s crucial to acknowledge that while these benefits are substantial, they do come at a cost, including heightened engine wear and increased fuel consumption at lower speeds.

For Asian or European Spec NSXs (1994 – 1996), the conversion requires only the Countershaft, Main shaft, Oil Pump Gear, and the Final Drive.

Gear Ratio Comparison Chart:

When comparing the gear ratios between the USDM 91-94 NSX and the NSX-R 93-95, there are several differences that can affect the performance and driving experience. Here’s a breakdown of the pros and cons of each gear ratio configuration:

USDM 91-94 NSX Gear Ratios
Pros:
Fuel Efficiency: The taller gears (particularly in 2nd, 3rd, and 4th) can result in better fuel economy during highway cruising, as the engine runs at lower RPMs for a given speed.
Lower Noise and Vibration: Lower RPMs at cruising speeds can lead to reduced noise and vibration inside the cabin, enhancing comfort for daily driving.
Smoother Acceleration: The gear spacing is more relaxed, which can lead to smoother and less aggressive acceleration, suitable for casual and comfortable driving.
Better for Long Drives: The setup is more suited for long-distance driving, offering a relaxed driving experience with less frequent shifting.

Cons:
Reduced Acceleration: The taller gear ratios can result in slower acceleration, especially noticeable in performance contexts like track days or spirited driving.
Less Torque Multiplication: Compared to the NSX-R, the USDM setup provides less torque multiplication, which can reduce the vehicle’s responsiveness.
Less Sporty Feel: The taller gears can make the car feel less sporty and more oriented towards comfort rather than performance.

NSX-R 93-95 Gear Ratios
Pros:
Improved Acceleration: Shorter gear ratios in 2nd, 3rd, and 4th gears provide better acceleration, making the car feel more responsive and livelier.
Higher Torque Multiplication: The increased final drive ratio and shorter gear spacing deliver more torque to the wheels, enhancing the car’s performance in low to mid-range speeds.
Sportier Driving Experience: The gear ratios are optimized for performance, providing a sportier and more engaging driving experience, especially in twisty or track settings.
Enhanced Throttle Response: With more closely spaced gears, the throttle response is improved, making the car more agile during acceleration.

Cons:
Lower Fuel Efficiency: The shorter gears lead to higher RPMs at highway speeds, resulting in decreased fuel economy compared to the USDM model.
Increased Noise and Vibration: Higher engine RPMs during cruising can lead to increased cabin noise and vibration, potentially reducing comfort for long-distance driving.
More Frequent Shifting: The closer gear spacing may require more frequent shifting, which can be less convenient in everyday driving situations.
Potential for Higher Wear: Operating at higher RPMs more frequently can contribute to increased wear on the engine and transmission components over time.

Conclusion

The choice between the USDM 91-94 NSX and NSX-R 93-95 gear ratios depends largely on the intended use of the vehicle:
USDM 91-94 NSX Gear Ratios are better suited for drivers who prioritize comfort, fuel efficiency, and a relaxed driving experience. This setup is ideal for long-distance and daily driving where a smooth ride is desired.
NSX-R 93-95 Gear Ratios cater to those who seek a more performance-oriented and engaging driving experience. The shorter gear ratios make it an excellent choice for spirited driving, track use, and situations where acceleration and responsiveness are paramount.

Ultimately, the decision will depend on personal preferences and how the vehicle is intended to be used. If performance and excitement are the goals, the NSX-R 93-95 gear ratios are the way to go. For a more comfortable and fuel-efficient drive, the USDM 91-94 NSX setup may be preferable.