misfire = spark not able to ionise mixture or arc across gap, OR
misfire = spark not able to effectively and reliably ignite the mixture.
if the mixture is reliably igniting, and the ignition timing is set so the peak cylinder pressure arrives at the right time.. is there much to gain i wonder?
looking forward to your tests
btw, have you compared the graphs for the runs you have done with those different spark gaps, and was the timing optimised for each gap?
edit: it also depends where your spark is being generated..
if you are bending the ground electrode, then the end will be closest together, so the spark will be right at the end, giving great access to the mixture. if you use a plug with parallel surfaces (ground and centre electrodes) then the spark position should change, and may sometimes be shielded somewhat from the mixture?
or are you using platinum or iridium style plugs? they should have less issues with shielding
Bookmarks