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. A dynamometer mainly measures Horse Power (usually at the crank shaft but in the case of a chassis dyno, Horse Power is only measured at the rear axle), torque, RPM range over which the engine was tested, temperature and air flow (volume and velocity of the air that ventilates the engine). Some dynamometers also …

How dynamometers work

Dynamometers or dyno systems seem complicated but once you understand the basics it all becomes clear! A dynamometer is basically just a measuring tool, in the same way as voltmeters, scales or speedometers are. Among force-measuring devices, dynamometers are a flexible metallic ring that bends when a force is applied in such a manner as to tend to collapse it (the amount of bending being a measure of the applied force) and a hydraulic “load cell” that measures compressive loads in terms of fluid pressure. Once you have built your new motor, or fitted any tuning parts, it is very important to visit a good automotive Dynamometer or rolling road. If you don’t, then you will never be able to …