skywalker : eddy current? u sure? ive studied electronics and electrical for more then 6 years now and ive never heard of dis way to reduce eddy current, care to explain the concept behind it? hmm..
the ignition earth cable grounds any excessive stray charge generated around the distributor and engine... this stray electrostatic charge is bad for the spark to travel from one end to another...
for example, np-junction transistor... neutrons travel from one end to another much more easily when the positive end doesnt not have any stray electron which can slows/affects the electrons flow efficiency rite??... thus, by grounding away stray charge, current from distributor can transfer to sparkplug via plug cable more efficiently...
this is also similar concept on sparkplug cables which has grounding cable (such as nology and prorallye cables)....
PS: correct me if wrong... my electronics not vr kengz only... alwiz fail exam one...