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

The 1/8 Mile ET (Elapsed Time) equation estimates the time it takes for a vehicle to complete an 1/8 mile drag race based on its weight and horsepower. This calculation helps racers predict performance and optimize their vehicle setup.

2. How Does the Calculator Work?

The calculator uses the ET equation:

Where:

• \( weight \) — Vehicle weight (pounds)
• \( HP \) — Horsepower

Explanation: The equation calculates the elapsed time by taking the cube root of the weight-to-horsepower ratio and multiplying it by the constant 3.58.

3. Importance of ET Calculation

Details: Accurate ET estimation is crucial for drag racers to predict race performance, compare different vehicle setups, and make informed decisions about modifications and tuning.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this ET calculation?
A: This calculation provides a good estimate but actual performance may vary based on traction, aerodynamics, driver skill, and other factors.

Q2: What is considered a good 1/8 mile ET?
A: ET values vary by vehicle type and class. Generally, faster times are better, with professional drag cars achieving times under 5 seconds.

Q3: Can this formula be used for 1/4 mile calculations?
A: No, this specific formula is designed for 1/8 mile calculations. Different constants and formulas are used for 1/4 mile estimations.

Q4: Does this account for drivetrain losses?
A: The formula uses horsepower input. For most accurate results, use wheel horsepower measurements that account for drivetrain losses.

Q5: How does weight reduction affect ET?
A: Reducing vehicle weight improves the weight-to-power ratio, resulting in faster ET times. Even small weight reductions can make noticeable differences.