1. What is the Drag Car ET Equation?

The Drag Car ET (Elapsed Time) equation estimates the quarter-mile elapsed time for a drag racing vehicle based on its weight and horsepower. This formula provides a theoretical estimation of performance potential.

2. How Does the Calculator Work?

The calculator uses the Drag Car ET equation:

Where:

• \( ET \) — Elapsed Time (seconds)
• \( WT \) — Vehicle Weight (pounds)
• \( HP \) — Horsepower (horsepower)

Explanation: The equation calculates the theoretical quarter-mile time based on the power-to-weight ratio of the vehicle, with the cube root relationship reflecting the diminishing returns of additional power.

3. Importance of ET Calculation

Details: Accurate ET estimation is crucial for drag racers to predict performance, compare vehicle setups, and optimize power-to-weight ratios for competitive racing.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and horsepower in horsepower. Both values must be valid (weight > 0, horsepower > 0). The result provides estimated quarter-mile elapsed time in seconds.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this ET calculation?
A: This provides a theoretical estimation. Actual ET can vary based on traction, aerodynamics, driver skill, and other factors.

Q2: What is considered a good ET for drag racing?
A: ETs vary by vehicle class. Generally, under 12 seconds is good for street cars, while professional dragsters can achieve under 4 seconds.

Q3: Does this equation account for drivetrain loss?
A: No, this uses raw horsepower. For more accuracy, use wheel horsepower instead of engine horsepower.

Q4: Can this be used for different racing distances?
A: This equation is specifically calibrated for quarter-mile (1320 feet/402 meters) drag racing.

Q5: How does weight reduction affect ET?
A: Weight reduction has a significant impact. Reducing weight by 10% can improve ET by approximately 3-4%.