J549: Preignition Rating of Spark Plugs - SAE International
Browse Standards J549_199911
Historical REVISED 1999-11-15

Preignition Rating of Spark Plugs J549_199911

This SAE Recommended Practice describes the equipment and procedures used in obtaining preignition ratings of spark plugs. The spark plug preignition ratings obtained with the equipment and procedure specified herein are useful for comparative purposes and are not to be considered as absolute values since different numerical values may be obtained in different laboratories.
J549_201503
2015-03-03
Latest
Revised
J549_201303
2013-03-11
Historical
Stabilized
J549_199911
1999-11-15
Historical
Revised
J549_199006
1990-06-01
Historical
Revised
J549_198206
1982-06-01
Historical
Revised
J549A_197010
1970-10-01
Historical
Revised

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