a: Octane rating ~
b: a heat rating

What: "Octane rating is like a heat rating, in that the fuel will resist igniting before it should, its a more controlled burn. Thats what pinging is, its the fuel igniting before the spark of the sparkplug ignites it. Just the heat from high compression can cause this, carbon glowing red or a maybe a sparkplug thats too hot and glowing red igniting the fuel before its supposed to be ignited, an airleak on the intake creating a lean condition and causing excess heat can also do it."

Writer: Stink
Date: Oct 2 2013 1:12 PM

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