Detonation, Pre-ignition, and the Danger of a Hot Spark Plug in
an Ethanol Fuel Racing Application
Detonation, Pre-ignition, and the Danger of a Hot Spark Plug in an Ethanol Fuel Racing Application By: Eric Niefert, Owner Horsepower Innovations LLC I think there is a lot of confusion on the difference between Detonation (knock) and pre-ignition, especially when talking about spark plug heat range. Knowing and unde