1. What is Air Filter Size vs Horsepower Calculator?

Definition: This calculator estimates potential horsepower gains from increasing air filter size in turbocharged engines.

Purpose: Helps performance enthusiasts and mechanics evaluate potential power improvements from larger air filters.

2. How Does the Calculator Work?

The calculator uses these principles:

Key Factors:

• Current HP: Baseline engine horsepower
• Filter Size Ratio: New vs old filter surface area
• Boost Pressure: Higher boost magnifies airflow benefits

Note: Results are estimates - actual gains depend on many factors including filter quality, intake design, and engine tuning.

3. Importance of Air Filter Sizing

Details: Proper air filter sizing ensures:

• Reduced intake restriction
• Improved turbo spool response
• Potential horsepower gains (especially at high RPM)
• Maintained filtration efficiency

4. Using the Calculator

Tips:

• Measure filter surface area (length × width × pleat count × pleat depth)
• Higher boost engines typically benefit more from larger filters
• Gains are typically 5-15 HP for significant size increases

5. Frequently Asked Questions (FAQ)

Q1: How accurate are these estimates?
A: They're approximations - real dyno results may vary ±30% based on other system factors.

Q2: What's the maximum HP gain possible?
A: Most street turbo engines see 5-15 HP gains from optimal filter sizing.

Q3: Does filter material matter?
A: Yes - high-flow cotton gauze filters typically outperform paper at similar sizes.

Q4: When does filter size stop helping?
A: Diminishing returns typically set in when filter area exceeds 2x the turbo inlet size.

Q5: Should I remove my air filter for more power?
A: Never - the minimal gain isn't worth risking engine damage from contaminants.