Pre-ignition for an automobile engine to continue on for thousands of kilometers with mild detonation, pre-ignition can destroy an engine in just a few strokes of the piston. Pre-ignition Pre-ignition (or preignition) in a spark-ignition engine is a technically different phenomenon from engine knocking, and describes the event wherein the air/fuel mixture in the cylinder ignites before the spark plug fires. Pre-ignition is initiated by an ignition source other than the spark, such as hot spots in the combustion chamber, a spark plug that runs too hot for the application, or carbonaceous deposits in the combustion chamber heated to incandescence by
Archaic Greece its connotations in English of being primitive and outdated. No term which has been suggested to replace it has gained widespread currency, however, and the term is still in use. Much of our evidence about the Classical period of ancient Greece comes from written histories, such as Thucydides' History of the Peloponnesian War. By contrast, we have no such evidence from the Archaic period. We have written accounts of life in the period in the form of poetry, and epigraphical evidence, including parts of law codes, inscriptions on votive offerings, and epigrams inscribed on tombs. However, none of this evidence