1. What is the E85 Horsepower Calculation?

The E85 horsepower calculation estimates the potential power increase when switching from gasoline to E85 fuel. E85 (85% ethanol, 15% gasoline) typically provides about 10% more horsepower due to its higher octane rating and cooling properties.

2. How Does the Calculator Work?

The calculator uses the E85 horsepower formula:

Where:

• \( HP_{gas} \) — Horsepower on gasoline
• 1.1 — 10% power increase multiplier for E85

Explanation: The equation accounts for the typical power increase when using E85 fuel instead of gasoline.

3. Importance of E85 Horsepower Calculation

Details: Understanding potential power gains helps in performance tuning decisions and fuel system upgrades when converting to E85.

4. Using the Calculator

Tips: Enter your current gasoline horsepower. The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Why does E85 provide more power?
A: E85 has higher octane (105+) allowing more aggressive timing, and its higher latent heat of vaporization provides charge cooling.

Q2: Is the 10% increase guaranteed?
A: No, this is an estimate. Actual gains depend on engine tuning, compression ratio, and other factors.

Q3: What modifications are needed for E85?
A: Typically requires larger fuel injectors, higher flow fuel pump, and ECU tuning to account for E85's different stoichiometric ratio.

Q4: Are there downsides to E85?
A: Lower energy content means ~30% worse fuel economy. Availability may be limited in some areas.

Q5: Can any car use E85?
A: Only Flex-Fuel vehicles can use E85 without modification. Conventional vehicles require significant modifications.