E-3's, I'm not saying it's true or not, I don't know, probably Snake-Oil, but they claim, on an independent blind study, testing several different brands, they have a quicker, larger, more complete combustion chamber filling spark on any given ignition system/combustion chamber shape, for a fractionally longer more complete burn, they also claim they make a few more HP on any given engine, grant you "if it does work, it's fractionally"... I saw a show Stacey Davids Gears I think it was, I don't remember the name of the company doing the testing, that was showing them {the E-3's} & they were obviously better than the other two brands plugs they were testing at the same time on a side by side comparison, time laps video, spark volume, fuel burn/energy, heat dissipation {very important in a spark plug} & voltage, readings... Snake oil crap just like, the same thing said about, Split-fires, but they worked very well in my 350cc 2 stroke Banshee Quad, never tried them in anything other than the Quad, but I had far less fouling issues, from idling around or low RPM trail riding, than any equal heat range & extended/projected tip Autolites, Champion, NGK, or even the Platinum Series Electrodes in any of the mentioned brands, plugs lasted "far longer" with out any fouling issues... But I'm still not convinced either way, 100%, until I can compare them on a dyno & see it for myself...
My Father retired from Autolite,,, They manufactured Split Fire plugs in Fostoria Ohio at the Autolite plant (along with several other brand name and store named plugs like Champion, A/C Delco, Sears, etc.).... From what I remember Dad telling me, one of the engineers working at that facility came up with the idea to test it, and it was never manufactured under the Autolite name "I believe testing showed no improvements" and later sold the idea.
I guess you never really know for sure what your getting.....
Plug gap can and does change the "Heat" of any given plug, and can be seen on the scope when an engine is running. In College we learned about GM in the 70's going to the HEI ign and also playing around with plug gaps to create an EPA freindly engine. If you look back in the spark plug data for GM they started getting gaps up to .060",,,, and I think even greater! They needed that big spark to ignite the lean fuel mixture, and also to generate a more complete ign. This is were that HEI (high energy ignition) coil comes into play... I don't have the memory I once had, but seems to me I used to see 45kv to 50 KV on the scope when reading the HEI plug leads. I think the standard non- HEI coils produced 35KV with a .035" gap plug or somewhere around that amount.... 10,000 to 15,000 volts differance....
I wonder if the tests were performed with a coil that can take advantage of larger gaps, and I also wonder what the gaps were all set at? were they equal, and how were the E-3's measured?
About the only advantage I can see is that with more ground wires attached to the shell (and they would all have to be pretty darn close to
exactly the same gap), would be the reduction of metal transfer on any individual wire because you have three times the available area to deposit the tranfered metal through repeated spark.
Hears another "
Possible" and I mean very unlikely gain "at least from my point of view", is that the optional ground lead that the spark jumps to MIGHT be in the correct index to prevent shrouding of the arc....
I remember trying to find that extra horsepower by indexing the spark plugs so the wire was "theoretically" on the opposite side of the swirl of the air fuel mixture during ignition..... I cant say I ever seen any gains from doing this though... I never realy hear about it anymore either....
Anyhow to Budnicks point,,,, "they" did test them and said they were better... But I believe... "liars figure, and figures lie!" Not all the time,,, but often enough that I have to rely on good Ol' common sense and my education to come to my own truth about these come and go products...:happy7: