• Measure engine Power
• Measure engine Torque
• 0-60 Acceleration times
• ¼ mile run timing
• And much more

A Dynamometer or Dyno is a device for measuring the torque and therefore power delivered at the wheels of a car or motorbike. Usually, the drive wheels are used to spin a pair of rollers. These allow the vehicle to remain stationary while connected up to test equipment. The rollers drive a heavy flywheel, allowing torque and power to be calculated from the time taken to accelerate the flywheel.

Essentially, it is a method to measure torque and power while the vehicle is driven on normal roads rather than a rolling road. It allows power and torque curves to be plotted against engine rpm or distance runs to be timed. Measurement results can be recorded for analysis or viewed live on the dashboard.

• Accuracy - controlled and calibrated test conditions.
• Safe and stationary vehicle during test.
• Engine tuning adjustments can be made during the test.

• Expensive - cost per test high due to equipment and operating staff.
• Real road issues may not be revealed.

• Low Cost - equipment is cheap, used on many runs.
• Drag strip timing.
• Testing under real road conditions.

• Less accurate due to estimates such as weight and air resistance.
• Drag strip timing.
• Engine tuning adjustments can't be made during a test.