1. What is ET Time Calculation?

ET (Elapsed Time) calculation for 1/8 mile measures the time it takes a vehicle to cover a distance of 1/8 mile from a standing start, commonly used in drag racing performance evaluation.

2. How Does the Calculator Work?

The calculator uses the physics formula:

Where:

• \( Distance \) — Race distance in miles (typically 0.125 for 1/8 mile)
• \( Acceleration \) — Vehicle acceleration rate in mph per second

Explanation: The formula calculates time based on constant acceleration physics principles, assuming the vehicle maintains consistent acceleration throughout the run.

3. Importance of ET Time Calculation

Details: ET time is a critical performance metric in drag racing, helping racers evaluate vehicle performance, tune their vehicles, and compare different setups and modifications.

4. Using the Calculator

Tips: Enter distance in miles (0.125 for standard 1/8 mile) and acceleration in mph per second. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good ET for 1/8 mile?
A: Professional drag cars can achieve 4-5 seconds, while street-legal performance cars typically range from 7-9 seconds for 1/8 mile.

Q2: How does ET relate to quarter mile time?
A: Quarter mile times are typically 1.5-1.6 times longer than 1/8 mile times, though this varies based on vehicle performance characteristics.

Q3: What factors affect ET time?
A: Vehicle power-to-weight ratio, traction, aerodynamics, transmission type, and driver skill all significantly impact ET times.

Q4: Can I use this for electric vehicles?
A: Yes, the physics principles apply to all vehicles, though electric vehicles often have different acceleration curves than internal combustion engines.

Q5: How accurate is this calculation?
A: This provides a theoretical estimate assuming constant acceleration. Real-world results may vary due to traction limits, shifting, and changing acceleration rates.