According to NGK, adding 10 degrees of ignition timing at idle will raise the spark plug temperature anywhere from 180- to 210 degrees Fahrenheit. This means that adding just one degree of ...

Ignition Timing The (p,v) diagram opposite shows the point in the compression cycle at which the spark was fired. This point is before the piston has reached top dead center (tdc) and it allows the ...

Zhiyu Han, Rolf D. Reitz, Jialin Yang, Richard W. Anderson, Effects of Injection Timing on Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine, SAE Transactions, Vol. 106, Section 3: JOURNAL ...