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The Subaru WRX is renowned for its performance and handling, especially among enthusiasts who seek to push the limits of their vehicles. When considering upgrades to handle over 450 horsepower, the clutch and transmission play crucial roles in ensuring that power is effectively transferred to the wheels. This article explores various performance upgrades for the WRX’s clutch and transmission, focusing on how to manage high horsepower while maintaining the stock gearbox.
Understanding the Stock Gearbox
The stock gearbox in the Subaru WRX is designed to handle a specific amount of power and torque. While it is robust, pushing beyond 450 horsepower can lead to premature wear or failure if not properly managed. Understanding the capabilities and limitations of the stock transmission is essential for any performance upgrade.
Performance Clutch Options
A performance clutch is vital for transferring power effectively from the engine to the transmission. Upgrading to a high-performance clutch can improve engagement, reduce slippage, and enhance overall driving experience.
Types of Performance Clutches
- Organic Clutch: Offers smooth engagement and is suitable for daily driving.
- Sprung Clutch: Provides better shock absorption, making it ideal for street use.
- Unsprung Clutch: Designed for racing, offers quicker engagement but can be harsher on the drivetrain.
Recommended Clutch Brands
- Exedy: Known for high-quality performance clutches that handle increased power.
- ACT (Advanced Clutch Technology): Offers a range of clutches for various performance levels.
- Clutch Masters: Provides options for both street and race applications.
Transmission Upgrades
While the stock gearbox can handle a significant amount of power, certain upgrades can enhance its performance and longevity. These upgrades focus on improving shifting speed, reducing wear, and increasing overall reliability.
Short Shifter Kits
A short shifter kit can improve the responsiveness of gear changes, allowing for quicker shifts. This can be particularly beneficial when driving aggressively or on the track.
Transmission Fluid Upgrades
Using high-performance transmission fluid can help maintain optimal operating temperatures and reduce friction within the gearbox. This is crucial for managing the increased power levels associated with 450+ HP builds.
Gear Set Options
For those looking to maximize performance, upgrading to a different gear set can help optimize power delivery. This can enhance acceleration and improve overall drivability, particularly at higher horsepower levels.
Maintaining Reliability
When pushing a Subaru WRX to handle over 450 horsepower, maintaining reliability is paramount. Regular maintenance and monitoring of clutch and transmission performance can help prevent issues before they arise.
Regular Inspections
Conducting regular inspections of the clutch and transmission can help identify wear and tear. Look for signs of slipping, unusual noises, or difficulty in shifting.
Fluid Changes
Changing the transmission fluid at regular intervals is essential for maintaining performance. It is advisable to use fluids that are specifically designed for high-performance applications.
Conclusion
Upgrading the clutch and transmission in a Subaru WRX to handle over 450 horsepower is a challenging yet rewarding endeavor. By selecting the right components and performing regular maintenance, enthusiasts can ensure that their vehicles not only achieve impressive power levels but also maintain reliability and drivability.