Flywheel Upgrades for Subaru Wrx: Gain 10-12 Hp with Lightened Options

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The Subaru WRX is a beloved performance car known for its rally heritage and impressive power. One of the ways to enhance its performance is through flywheel upgrades. A lightened flywheel can provide significant horsepower gains, improving acceleration and throttle response.

Understanding Flywheel Upgrades

A flywheel is a crucial component of a vehicle’s engine system. It stores rotational energy and helps smooth out the power delivery from the engine to the transmission. Upgrading to a lighter flywheel can reduce rotational mass, allowing the engine to rev more freely and efficiently.

Benefits of Lightened Flywheels

Upgrading to a lightened flywheel offers several benefits for Subaru WRX owners:

  • Increased Horsepower: Lightened flywheels can provide a gain of 10-12 HP.
  • Improved Throttle Response: A lighter flywheel allows for quicker engine revs.
  • Enhanced Acceleration: Reducing the flywheel weight improves acceleration times.
  • Better Engine Rev Matching: Easier to match revs during downshifts.

Choosing the Right Flywheel

When selecting a flywheel for your Subaru WRX, consider the following factors:

  • Material: Flywheels are commonly made from aluminum or steel. Aluminum is lighter but may not be as durable.
  • Weight: The weight of the flywheel can significantly impact performance. A typical lightened flywheel weighs between 10-15 lbs.
  • Compatibility: Ensure the flywheel is compatible with your specific WRX model and year.
  • Brand Reputation: Choose flywheels from reputable manufacturers known for quality and performance.

Installation Considerations

Installing a lightened flywheel is a task that can be performed by a professional mechanic or experienced DIY enthusiasts. Here are some considerations:

  • Tools Required: Ensure you have the necessary tools, including a torque wrench, impact gun, and flywheel puller.
  • Labor Time: Expect the installation to take several hours, depending on your skill level.
  • Clutch Replacement: It’s recommended to replace the clutch when installing a new flywheel.
  • Balancing: Make sure the new flywheel is properly balanced to avoid engine vibrations.

Potential Drawbacks

While lightened flywheels offer many advantages, there are potential drawbacks to consider:

  • Increased Engine RPM: A lighter flywheel may lead to higher RPMs at idle, which can affect drivability.
  • Noise: Some lightened flywheels can produce more noise during operation.
  • Wear on Components: Increased wear on the clutch and transmission components may occur.

Here are some popular lightened flywheel options for Subaru WRX owners:

  • Exedy Lightweight Flywheel: Known for its quality and performance, this flywheel provides a good balance of weight and durability.
  • ACT Street Lite Flywheel: Offers a significant weight reduction and is designed for street and track use.
  • Spec Stage 1 Flywheel: A great option for those looking for a lightweight solution without sacrificing driveability.
  • Fidanza Aluminum Flywheel: Lightweight and durable, this flywheel is a popular choice among performance enthusiasts.

Conclusion

Upgrading to a lightened flywheel is an excellent way to enhance the performance of your Subaru WRX. With gains of 10-12 HP, improved throttle response, and better acceleration, it’s a modification worth considering. Be sure to weigh the benefits and drawbacks, choose the right flywheel, and consider professional installation for the best results.