1. What is a Crank HP to Wheel HP Calculator?

Definition: This calculator converts crank horsepower (engine output) to wheel horsepower (actual power at the wheels) by accounting for drivetrain losses.

Purpose: It helps automotive enthusiasts and professionals estimate real-world power delivery after drivetrain losses.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( WHP \) — Wheel horsepower (power at the wheels)
• \( CHP \) — Crank horsepower (engine output power)
• \( DTL \) — Drivetrain loss factor (typically 0.10-0.20)

Explanation: The formula accounts for power lost through the transmission, differential, and other drivetrain components.

3. Importance of WHP Calculation

Details: Wheel horsepower represents the actual power available to move the vehicle, which is crucial for performance tuning and comparisons.

4. Using the Calculator

Tips: Enter the crank horsepower and drivetrain loss factor (default 0.15 for 15% loss). DTL must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical drivetrain loss factor?
A: Front-wheel drive: ~10-15%, Rear-wheel drive: ~15-20%, All-wheel drive: ~20-25%.

Q2: Why is WHP lower than CHP?
A: Power is lost through friction in the transmission, driveshaft, differential, and other components.

Q3: How accurate is this calculation?
A: It provides a good estimate, but actual dyno testing is needed for precise measurements.

Q4: Can WHP ever be higher than CHP?
A: No, drivetrain losses always result in WHP being lower than CHP.

Q5: How do I find my engine's crank horsepower?
A: Check manufacturer specifications or use a dynamometer with engine removal testing.