1. What is the Autosnout 1/4 Mile Equation?

The Autosnout equation estimates a vehicle's quarter-mile elapsed time (ET) based on its weight and horsepower. It provides a quick approximation of drag strip performance potential.

2. How Does the Calculator Work?

The calculator uses the Autosnout equation:

Where:

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

Explanation: The equation accounts for the power-to-weight ratio's cube root relationship with elapsed time.

3. Importance of 1/4 Mile Time

Details: Quarter-mile time is a standard performance metric that helps compare acceleration and power delivery across different vehicles.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this estimate?
A: It provides a rough approximation. Actual performance depends on traction, gearing, aerodynamics, and other factors.

Q2: Should I use curb weight or race weight?
A: For most accurate results, use the actual weight the car will have during the run (including driver and fuel).

Q3: What's considered a good 1/4 mile time?
A: Times vary by vehicle type. Under 12 seconds is excellent for street cars, while 14-15 seconds is typical for average cars.

Q4: Does this account for drivetrain loss?
A: No, the equation uses raw horsepower numbers. For wheel horsepower, results may be slightly optimistic.

Q5: Can I use this for motorcycles?
A: The equation works for any vehicle, but motorcycles may show different results due to their power delivery and weight distribution.