My opinion is stick with the copper spark plug. I have seen multiple vehicles that customers have installed E3 plugs and they ran into drivability issues. I just got done having long conversations with both NGK and Autolite about plugs, heat transfer and plug gap. I myself didn't realize the importance of a few thousands plug gap. My eninge went from not running at all under boost at .028 gap and making 600 whp at. 020 gap. One thing I realized is that everyone has a different opinion opinion and you just need to install what works. My opinion is plain old copper plug.

I had a 1994 ford escort lx with a 1.9l in it and tried those e3's once. Upped my mpg by 10 miles to a tank and a before that a tank lasted me between 320-350 miles. Seat of pants dyno says there was also a lil more power there. After bout a yr had one go funky on me and i just replaced them with autolites

The chip in the HEI - the good ones we are talking about here, not junk - are good to switch 36 volts. Roundy-round racers have been "juicing" them for years - and as JD reports, they work.

As you might expect - it takes a quality coil.......

 
 Steve Metzger       Tucson, Arizona

Ted......Have you ever tried an HEI with 18 volts?  Unbelievable what it's done for my GMC's. JD

56 Vic, B'Ville 200 MPH Club Member, So Cal.

I do remember the Split-Fire. There have been numerous "improved" electrodes over the years. Check the tip on this Lodge plug.



I remember first seeing a Lodge plug in the mid sixties, that one had three ground electrodes. They're a nice pink color also.



Even big names get into the act, for example Nippondenso's U electrode.



Seems none of them were overly successful.

"The Master Cylinder"

Enjoying life at the beach in SOCAL

Seems to me that most if all claims made about "new and improved" spark plugs have been proven to be "marketing based". remember the "Splitfire"?

Ted's appraisal - that it needs to be the right heat range - and wrung out non the dyno - will probably be a bit more useful than an advertisement.

 
 Steve Metzger       Tucson, Arizona

Try this.   http://www.e3sparkplugs.com/  

Lorena, Texas (South of Waco)

http://www.jegs.com/webapp/wcs/stores/servlet/KeywordSearchCmd?storeId=10001&catalogId=10002&langId=-1&Ntk=all&Jnar=0&Ne=1%2B2%2B3%2B13%2B1147708&searchTerm=e3+plugs

marv

I tried a Google search on e3 and came up with nothing related to spark plugs. Anyone have a url???

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

The E3.72 spark plug that’s called for a Y in the E3 listings happens to be the same spark plug as also listed for the 352 FE.  In looking through the crossover list I could not determine which Autolite or Motorcraft spark plug crosses over to the E3.72 plug though.

 

But I would like to run a set on the dyno mule just to see where the heat range falls as compared to the other spark plugs that are being used.  While I’ve found that the spark plug gap is a non-player in regards to horsepower production up to point that the gap is increased so much that misfires occur, the heat range on the other hand is a significant player.

Lorena, Texas (South of Waco)