1. What is the Drag Racing ET Equation?

The Drag Racing ET (Elapsed Time) equation estimates the time it takes for a vehicle to complete a quarter-mile drag race based on weight and horsepower. It provides a theoretical performance benchmark for drag racing vehicles.

2. How Does the Calculator Work?

The calculator uses the Drag Racing ET equation:

Where:

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

Explanation: The equation calculates the elapsed time based on the cube root of the weight-to-power ratio, providing a realistic estimate of quarter-mile performance.

3. Importance of ET Calculation

Details: Accurate ET estimation is crucial for performance tuning, comparing vehicle capabilities, and setting realistic expectations for drag racing performance.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: What is considered a good ET time?
A: Professional drag cars can achieve ETs under 7 seconds, while street-legal performance cars typically range from 11-14 seconds.

Q3: Does this account for drivetrain losses?
A: The equation uses engine horsepower. For wheel horsepower measurements, results may need adjustment.

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

Q5: How does weight reduction affect ET?
A: Reducing weight has a significant impact on ET, as it directly affects the weight-to-power ratio in the calculation.