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The Blouch Dominator Blow Off Valve (BOV) is a crucial component for Subaru enthusiasts looking to maximize power in their vehicles, especially those pushing over 500 horsepower. This article delves into the importance of selecting the right size BOV for optimal performance, ensuring your Subaru runs efficiently and powerfully.
Understanding Blow Off Valves
Blow Off Valves play a vital role in turbocharged engines by releasing excess pressure in the intake system when the throttle is closed. This prevents compressor surge, which can damage the turbocharger and negatively impact performance. For high-performance setups, such as those exceeding 500 hp, the choice of BOV size is critical.
Why Size Matters
The size of the BOV directly affects its ability to vent air quickly and efficiently. An improperly sized BOV can lead to various issues, including:
- Compressor Surge: A too-small BOV can’t vent enough pressure, causing the turbo to stall.
- Boost Leaks: An oversized BOV may not seal properly, leading to unwanted boost loss.
- Performance Issues: Incorrect sizing can result in sluggish throttle response and reduced power.
Recommended Sizes for 500+ HP Subarus
For Subarus producing over 500 horsepower, selecting the appropriate BOV size is essential for maintaining performance. Here are some recommendations based on common turbo setups:
- 1.5 Inch BOV: Suitable for setups between 500 to 600 hp. Provides a good balance of venting and sealing.
- 2.0 Inch BOV: Recommended for setups exceeding 600 hp. Offers increased flow capacity to handle higher boost levels.
- Adjustable BOV: Consider models with adjustable settings to fine-tune the venting pressure based on specific tuning needs.
Installation Considerations
Installing a Blouch Dominator BOV requires careful consideration to ensure optimal performance. Here are some key points to keep in mind during installation:
- Location: Position the BOV as close to the throttle body as possible to minimize pressure drop.
- Vacuum Source: Ensure a proper vacuum source is used for the BOV diaphragm to function effectively.
- Pipe Size: Match the BOV to the diameter of the intake piping to avoid turbulence.
Tuning After Installation
After installing the BOV, it is crucial to tune the vehicle to ensure everything works harmoniously. Proper tuning can help achieve the following:
- Optimal Performance: Ensures the engine runs at peak efficiency with the new BOV.
- Boost Control: Helps maintain consistent boost levels across the RPM range.
- Engine Safety: Prevents potential damage from compressor surge and boost leaks.
Conclusion
Maximizing power in 500+ hp Subarus requires careful consideration of components, and the Blouch Dominator Blow Off Valve is no exception. By selecting the right size and ensuring proper installation and tuning, Subaru enthusiasts can enhance their vehicle’s performance and reliability.