1. What is the Drag Race Performance Equation?

The Drag Race Performance Equation estimates elapsed time (ET) for a quarter-mile drag race based on vehicle weight and horsepower. It provides a theoretical performance benchmark for drag racing vehicles.

2. How Does the Calculator Work?

The calculator uses the drag race performance equation:

Where:

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

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 how weight and power changes affect quarter-mile times.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and engine horsepower. Both values must be greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

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

Q2: What is a good ET for a street car?
A: Most production cars range from 13-16 seconds. Performance models can achieve 11-13 seconds, while dedicated drag cars can run under 10 seconds.

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

Q4: Can I use this 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 similar effect to increasing horsepower. A 10% weight reduction is roughly equivalent to a 10% power increase in terms of ET improvement.