1. What is the Drag ET Equation?

The Drag ET (Elapsed Time) equation estimates the time it takes for a vehicle to complete a quarter-mile drag race based on its weight and horsepower. It provides a theoretical estimation of a vehicle's performance potential.

2. How Does the Calculator Work?

The calculator uses the Drag ET equation:

Where:

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

Explanation: The equation calculates the elapsed time based on the cube root of the weight-to-power ratio, with 5.825 as a constant factor derived from empirical data.

3. Importance of ET Calculation

Details: ET calculation is important for drag racing enthusiasts and automotive engineers to estimate vehicle performance, compare different setups, and understand the relationship between weight and power.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and horsepower. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Drag ET equation?
A: The equation provides a theoretical estimation. Actual ET can vary based on traction, aerodynamics, driver skill, and other factors.

Q2: What is a good ET for a street car?
A: For production street cars, ETs typically range from 12-16 seconds. Performance vehicles can achieve sub-12-second times.

Q3: Does this equation account for drivetrain losses?
A: No, this is a simplified formula that uses raw horsepower numbers. Actual wheel horsepower may be lower due to drivetrain losses.

Q4: Can I use this for motorcycles?
A: While the equation can provide an estimate, motorcycles have different weight distributions and traction characteristics that may affect actual performance.

Q5: How does weight reduction affect ET?
A: Reducing weight has a significant impact on ET. The cube root relationship means that even small weight reductions can noticeably improve quarter-mile times.