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The FA24 engine has gained significant attention in the automotive community, particularly among enthusiasts looking to enhance performance. With stock power figures around 271 horsepower, the potential for improvement is enticing. One of the most popular modifications is the upgrade to E85 flex fuel, which can lead to substantial gains in horsepower and torque. This article explores whether upgrading the FA24 engine to run on E85 is worth it, based on real-world results that show power increases up to 370 horsepower.
Understanding the FA24 Engine
The FA24 engine is a turbocharged four-cylinder engine developed by Subaru. It features a DOHC design and is known for its balance of efficiency and performance. With a stock output of 271 horsepower, the FA24 engine is capable of delivering a thrilling driving experience. However, many enthusiasts seek to unlock more power through modifications.
What is E85 Flex Fuel?
E85 is a fuel blend consisting of 85% ethanol and 15% gasoline. It has a higher octane rating than regular gasoline, which allows for more aggressive tuning and increased performance. Using E85 can lead to significant horsepower gains, especially when paired with the right modifications. However, it is essential to understand the implications of switching to E85, including changes in fuel system components and tuning requirements.
Benefits of Upgrading to E85
- Increased Horsepower: Many users have reported gains from 271 to 370 horsepower after switching to E85.
- Better Performance: E85 allows for higher boost levels and more aggressive tuning, resulting in improved throttle response.
- Cost Efficiency: E85 is often cheaper than premium gasoline, making it a cost-effective option for performance enthusiasts.
Real-World Results
Numerous case studies and dyno tests have documented the performance gains achieved by upgrading to E85. For instance, a stock FA24 engine running on regular gasoline might achieve around 271 horsepower. After installing a flex fuel kit and tuning the engine for E85, results have shown power outputs reaching as high as 370 horsepower.
These results vary based on several factors, including the quality of the tuning, supporting modifications, and the specific setup of each vehicle. However, many enthusiasts have reported similar increases, making it a popular choice for those looking to enhance performance.
Considerations Before Upgrading
- Fuel System Modifications: Upgrading to E85 may require changes to fuel injectors, fuel pumps, and lines to handle the corrosive nature of ethanol.
- Tuning Requirements: A proper tune is essential to maximize the benefits of E85 and ensure engine safety.
- Availability: E85 may not be readily available in all areas, so check local fuel stations.
Conclusion
Upgrading the FA24 engine to run on E85 flex fuel presents an exciting opportunity for enthusiasts seeking to boost performance. With real-world results showing power increases from 271 to 370 horsepower, the upgrade can be worth the investment for those willing to make the necessary modifications and adjustments. However, it is crucial to weigh the benefits against the considerations to ensure a successful upgrade.