PRIMARY AND SECONDARY IGNITION PATTERNS

we used an ignition oscilloscope to view the ignition primary and secondary patterns.with this, we could get the firing voltage, burn voltage burn time and dwell times for one or all of the cylinders.

primary patterns and secondary patterns have similar waveforms the difference being in the voltages.
from this screen we can get the height of the Firing KV which is how big a gap the spark has to jump(spark plug gap)

mirrors the spike that was created to jump across the spark plug gap.

Above is a video of the primary waveforms followed by Burn time graph.
Burn time measures how long the spark is flowing along the spark plug

Secondary Waveforms Clip. this test was perform with a spark tester plug installed on cylinder 3 lead.as you will notice the graph with for number three is higher indicating the higher output it has to fire the bigger gap

and heres thie KV bar graph

when accelerated, the graphs where higher and firing voltage was higher than at idle