The dynamometer is a device used to measure mechanical force, power and torque produced by an engine.
Issues regarding the use of dynamometers
A dynamometer is basically a tool to deliver an effective comparison or analysis of an engine output or performance. Dynamometers are a lagging indicator, which means the dyno only tells you what has occurred during the dyno run or test period. After you have applied your best engine building skills, the dyno serves the purpose of evaluating the engine’s capabilities at a specified moment in time.
Examining the dynamometer data
After you have performed your desired dynamometer tests, you need to take a look at the information you received. If you have a manual recording system you should calculate and transform the torque and rpm readings into horsepower numbers. If you’ve got a manual electronic data collection the next step will be to print out the data.