1. What is the Wallace Racing ET Calculator?

The Wallace Racing ET Calculator estimates elapsed time (ET) for drag racing vehicles based on weight and horsepower. It provides a quick and reliable method for predicting quarter-mile performance times.

2. How Does the Calculator Work?

The calculator uses the Wallace ET equation:

Where:

• \( ET \) — Elapsed Time (seconds)
• \( Weight \) — Vehicle weight (pounds)
• \( HP \) — Horsepower (hp)
• \( 5.825 \) — Empirical constant

Explanation: The equation calculates the cube root of the weight-to-power ratio, multiplied by a constant factor derived from empirical drag racing data.

3. Importance of ET Calculation

Details: Accurate ET estimation is crucial for drag racing performance tuning, vehicle setup optimization, and predicting competitive times in various racing classes.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and horsepower in hp. Both values must be positive numbers. The calculator provides estimated quarter-mile elapsed time in seconds.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Wallace ET formula?
A: The formula provides a good estimate for most drag racing applications, though actual performance may vary based on traction, aerodynamics, and drivetrain efficiency.

Q2: What weight should I use for the calculation?
A: Use the total vehicle weight including driver, fuel, and all racing equipment for most accurate results.

Q3: Does this account for different track conditions?
A: No, this is a theoretical calculation based on weight and power only. Actual track conditions, weather, and traction will affect real-world performance.

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

Q5: What is a good ET for street cars?
A: For modern performance street cars, ETs between 12-14 seconds are common, while high-performance models can achieve 10-12 seconds or better.