The SAE Recommended Practice has been adopted by SAE to specify:

a. a basis for net engine retarder power rating

b. Reference inlet air test conditions

c. A method for correcting observed engine retarder power to reference conditions

d. A method for determining net engine retarder power with a dynamo meter

Field of Application-This test code document is applicable to engine exhaust retarders on four-stroke compression ignition (CI), with and without change air cooling. This document does not apply to Aircraft, marine, spark ignition (S(), two-stroke compression ignition (CI) or mechanical super-charged ignition engines, compression release retarders, or combination exhaust and compression release retarders.