Performance measurements on chassis dynamometers ("rolling roads")

Contents part 1:

1) The history of horsepower

2) Physics
• Power and torque
• Calibration.

3) Accuracy – Repeatability
• Measurement chains
• Cylinder pressure

4) Test Conditions

5) Test & Measurements
• Steady state
• Acceleration with inertia load.
• Acceleration with road load
• Acceleration at constant rate.
• Minimum demands for professional performance measurement suppliers.
• Quality assurance information.


Contents part 2

6) Test results
• Acceleration test Mini Cooper S
• Acceleration test VW Passat 1.8T
• Test of 3 Race cars
• Statistics drive wheel performance, 404 cars
• Steady state power BMW M5 -02


Performance measurements on chassis dynamometers ("rolling roads"), part 1 [Download Part 1] (888 kb)
Performance measurements on chassis dynamometers ("rolling roads"), part 2 [Download Part 2] (954 kb)



Why powertrain performance measurements

To address why Powertrain Performance should be measured, Rototest Research Institute has published a White Paper where Powertrain Performance measurements versus engine performance is discussed. The paper also includes statistical data where stated engine performance is compared to powertrain performance.

Why powertrain performance measurements [Download] (214 kb)