1. What is the 1/8 Mile ET Equation?

The 1/8 Mile ET (Elapsed Time) equation estimates a vehicle's performance in drag racing over an 1/8 mile distance. It calculates the time it takes for a vehicle to cover the 1/8 mile track based on weight and horsepower.

2. How Does the Calculator Work?

The calculator uses the 1/8 Mile ET equation:

Where:

• \( ET \) — Elapsed Time (seconds)
• \( WT \) — Vehicle weight (pounds)
• \( HP \) — Horsepower
• \( constant \) — Empirical constant (typically 5.825)

Explanation: The equation estimates elapsed time based on the power-to-weight ratio of the vehicle, with an empirical constant that accounts for various factors affecting performance.

3. Importance of ET Calculation

Details: Accurate ET estimation is crucial for drag racing enthusiasts to predict vehicle performance, compare different setups, and optimize their vehicles for better track times.

4. Using the Calculator

Tips: Enter vehicle weight in pounds, horsepower, and the empirical constant. All values must be valid (weight > 0, horsepower > 0, constant > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical constant value?
A: The constant value is typically around 5.825 for most vehicles, but may vary based on specific vehicle characteristics and conditions.

Q2: How accurate is this estimation?
A: This provides a rough estimate. Actual performance may vary based on traction, aerodynamics, driver skill, and environmental conditions.

Q3: Can I use this for 1/4 mile estimation?
A: No, this equation is specifically for 1/8 mile distances. Different equations are used for 1/4 mile estimations.

Q4: Should I use curb weight or race weight?
A: For most accurate results, use the vehicle's race weight which includes driver, fuel, and any additional equipment.

Q5: Does this account for drivetrain loss?
A: The equation uses horsepower values. You should input wheel horsepower if possible for more accurate results.