1. What is the Horsepower to ET Calculator?

The Horsepower to ET Calculator estimates the elapsed time for a vehicle to complete a 1/8 mile drag race based on its weight and horsepower. This calculation helps racers and enthusiasts predict performance and optimize their vehicles.

2. How Does the Calculator Work?

The calculator uses the ET equation:

Where:

• \( ET \) — Elapsed time in seconds
• \( Weight \) — Vehicle weight in pounds (lb)
• \( HP \) — Horsepower of the vehicle

Explanation: The equation calculates the cube root of the weight-to-horsepower ratio and multiplies it by the constant 6.290 to estimate the 1/8 mile elapsed time.

3. Importance of ET Calculation

Details: Accurate ET estimation is crucial for drag racers to predict performance, compare vehicle setups, and make informed decisions about modifications and tuning.

4. Using the Calculator

Tips: Enter vehicle weight in pounds and horsepower. Both values must be positive numbers. The calculator will provide the estimated 1/8 mile elapsed time in seconds.

5. Frequently Asked Questions (FAQ)

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

Q2: What is considered a good 1/8 mile ET?
A: For street cars, 8-10 seconds is common. Performance cars can run 6-8 seconds, while professional drag cars can achieve times under 5 seconds.

Q3: Does this account for driver weight?
A: No, the calculation uses total vehicle weight. Be sure to include driver weight and any additional cargo in your total weight calculation.

Q4: Can I use this for 1/4 mile calculations?
A: No, this equation is specifically designed for 1/8 mile drag racing. Different equations are used for 1/4 mile calculations.

Q5: What factors affect actual ET besides weight and horsepower?
A: Traction, tire type, transmission efficiency, aerodynamics, weather conditions, and launch technique all significantly impact actual ET.