1. What is the Drag Race ET Equation?

The Drag Race ET (Elapsed Time) equation estimates the quarter-mile elapsed time based on vehicle weight and horsepower. It provides a theoretical estimation of drag racing performance.

2. How Does the Calculator Work?

The calculator uses the Drag Race ET equation:

Where:

• \( WT \) — Vehicle weight (pounds)
• \( HP \) — Engine horsepower (hp)

Explanation: The equation calculates the theoretical elapsed time for a quarter-mile drag race based on the power-to-weight ratio of the vehicle.

3. Importance of ET Calculation

Details: ET calculation helps racers estimate vehicle performance, compare different setups, and understand the impact of weight reduction or horsepower increases on quarter-mile times.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and horsepower in hp. Both values must be valid (greater than 0). The result provides an 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 a good ET for drag racing?
A: Professional drag cars can achieve ETs under 6 seconds, while street-legal performance cars typically range from 11-14 seconds.

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

Q4: Can I use this for different racing distances?
A: This equation is specifically calibrated for quarter-mile (1320 feet) drag racing.

Q5: How does weight affect ET?
A: Weight has a significant impact on ET. Reducing weight improves acceleration and decreases elapsed time.