As a general rule, the tests will be performed at the nominal speeds laid down by the manufacturer.
The parent engine of the family shall be selected using the primary criterion of the highest fuel delivery per stroke at the declared maximum torque speed. If two or more engines share this primary criterion, the parent engine shall be selected using the secondary criterion of highest fuel delivery per stroke at rated speed.
For engines with a swept volume below 0.75 dm3 per cylinder and a rated power speed above 3000 revolutions per minute
