1. What is the Quarter Mile ET Equation?

The Quarter Mile ET (Elapsed Time) equation estimates the time it takes for a vehicle to complete a quarter mile drag race based on its weight and horsepower. This formula provides a theoretical estimate of a vehicle's performance.

2. How Does the Calculator Work?

The calculator uses the Quarter Mile ET equation:

Where:

• \( Weight \) — Vehicle weight in pounds (lbs)
• \( HP \) — Engine horsepower (hp)
• 6.29 — Empirical constant

Explanation: The equation shows that elapsed time is proportional to the cube root of the weight-to-power ratio.

3. Importance of ET Calculation

Details: ET estimation helps racers and enthusiasts predict vehicle performance, compare different setups, and set realistic expectations for drag racing.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and engine horsepower. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this formula?
A: It provides a theoretical estimate. Actual ET depends on traction, aerodynamics, drivetrain efficiency, and other factors.

Q2: What are typical quarter mile times?
A: Street cars: 12-16 seconds, performance cars: 10-12 seconds, dragsters: under 7 seconds.

Q3: Does this account for driver skill?
A: No, this is a purely mechanical calculation assuming perfect traction and shifting.

Q4: Can I use this for motorcycles?
A: The formula works in principle, but motorcycles have different weight distributions and aerodynamics.

Q5: What's more important - weight or horsepower?
A: Both are equally important as they appear in a 1:1 ratio in the formula.