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This SAE Recommended Practice applies to nomenclature of turbocharger parts and terminology of performance.

This document specifies the procedure to be used for a manufacturer to certify the net power and torque rating of a production engine according to SAE J1349 (Rev. 8/04) or the gross engine power of a production engine according to SAE J1995. Manufacturers who advertise their engine power and torque ratings as Certified to SAE J1349 or SAE J1995 shall follow this procedure. Certification of engine power and torque to SAE J1349 or SAE J1995 is voluntary, however, this power certification process is mandatory for those advertising power ratings as “Certified to SAE J1349”. In the event that an engine made by one manufacturer is sold to a consumer in a vehicle produced by a second manufacturer, engine certification may be completed by either manufacturer or by both manufacturers working together. An example of the latter would be the completion of witness testing by the engine manufacturer with the submission of certification documents by the vehicle manufacturer.

The purpose of this SAE Recommended Practice is to establish reference standards for airflow measurements in the ranges required for testing automotive engine induction systems and to describe equipment that will facilitate the use of such standards to check the accuracy of various equipment and methods.

The purpose of this SAE Recommended Practice is to establish reference standards for airflow measurements in the ranges required for testing automotive engine induction systems and to describe equipment that will facilitate the use of such standards to check the accuracy of various equipment and methods.

The purpose of this SAE Recommended Practice is to establish reference standards for airflow measurements in the ranges required for testing automotive engine induction systems and to describe equipment that will facilitate the use of such standards to check the accuracy of various equipment and methods.

This test document is applicable to all superchargers not requiring fuel to be added to the inlet air prior to the supercharger. This SAE Standard only applies to bench testing. Any maximum speed, temperature, and pressure ratios supplied by the manufacturer should be for this use only and may not apply to applications of firing engines. This document has been adopted by SAE to specify: a A standard basis for supercharger efficiency rating b Reference inlet air supply test conditions c A method for correcting observed efficiency to reference conditions d A method for presenting these results in an accurate and usable way e A method to compare superchargers without the affects of engine dynamics and intercooling

The test procedures outlined in this recommended practice are applicable to single rotor turbochargers having either fixed- or variable-geometry with the following caveat: At this stage in the development of variable-geometry (VG) turbochargers, it would be impractical to generate a detailed practice to cover all types of VG turbochargers which may evolve. However, there is a requirement to quote performance data within a stipulated degree of accuracy and to furnish comprehensive performance information. This will form a basis for this document where further refinements may be added as experience and necessity dictate.

The test procedures outlined in this SAE Standard are applicable to turbocharging systems having either fixed- or variable-geometry.

The test procedures outlined in this SAE Recommended Practice are applicable to single rotor turbochargers having either fixed- or variable-geometry with the following caveat: At this stage in the development of variable-geometry (VG) turbochargers, it would be impractical to generate a detailed practice to cover all types of VG turbochargers which may evolve. However, there is a requirement to quote performance data within a stipulated degree of accuracy and to furnish comprehensive performance information. This will form a basis for this document where further refinements may be added as experience and necessity dictate.