Been running some R43XLS's in my warmed over 360. Gonna try some E3.46's ( direct cross ). Anyone else running E3's?

will be interested in seeing your results. i always thought those were just a "trick of the week" gimmick, so i never coughed up the bux to try a set. please don't think for one second i'm slamming you john ! it would be neat to do an A-B-A test on those if possible. please post your results. i will freely admit i am a "poopyhead" if you have success, right here before GOD and country !

Yeah, i'v been thinking about maybe giving those a try once I figure out what my 511 wants for heat range.

Re E3 plugs...
1. Some years back David Vizard did an article on them where he talked about the design and did a dyno test vs a comparable Autolite Racing plug (which he said at the time was the best performing racing plug he'd tested). It was a NASCAR Street Stock class engine making about 400 HP and they both made within 1/2 HP of each other. I searched for this article online, but haven't been able to find it.

2. Google "AETC 2015 E3" and you can get the overview of a presentation about them.

I use Autolite Racing plugs and don't feel any need to change. However, I did find some of the above interesting.

I will post results, but I warn you, they will be "seat of the pants". Plugs will be going in to a street build 360 ( .030 over 9.7:1, Hughes 1523AL, 2.02 pocket ported J heads, Edelbrock performer & 650 AVS. Petronix dist./ coil with Chrysler orange box ) where my R43XLS's were living quite happily. Just been curious about them and O'Reily's had them on sale.

Doubt my 72 year old saggidy-assed butt will be able to detect a 1/2 HP difference. Maybe on the drivability side, although that isn't an existing problem either with this mild build. At least if Capps or Schumacher asks me "What plug's are you running" I can say - same as you!

I like reading davids article. Interesting stuff.

I have had 4 different customers that wanted to see if the E3 plugs made more power. So at the end of the dyno session we put them in and they made less then 1 hp difference. We even adjusted one of the engines up and down 1 degree to see if it made a difference. But i am sure that the owners cars were faster due to the loss of weight inside their wallet.

Joe

It's been kinda fun watching guys over the years getting sucked into every little trick in the book over the years. Around 42 years ago I asked an old time mopar engine builder is question about an issue with the 340 in my duster back in my street racing days. When I told him what my car was doing he looked at me and said, You are using Champion spark plugs aren't you? I told him I was and he told me to throw them away and put a set of Auto-lite plugs in there and the issue would go away. I put a set in that day and have been running them ever since. Zero complaints

25 years ago or so I was building 318-2bbl motors for a local oval track series.

I generally prefer to use NGK plugs, and the normal plug for those was a BPR6ES.

I don't remember why I tried them, but the BPR6ET is the same plug with three ground straps and the electrode in the center of them.
No big gains, but they seemed to consistently add a number or two over the std plugs.
They were basically the same price...... So we stuck with them.

Piston engine aircraft engines have used multiple ground strap spark plugs for years, they have two plugs per cylinder and two magnetos also.
They would last about 500 hours in my 260 HP Lycoming 540 C.I. opposed flat six cylinder air cool engine.
They call for .016 air gap on both sides and I would have to gap them again after around one hundred hours due to wear on the center ground electrode and a little wear on the plug straps The instructions called for replacing them after the center electrode started looking a lot like a football instead of a baseball, which they would get like
Nothing magical or better about them is my impression, not cheap though either
Seems like several years back there was another attempt by a different company to market multiple ground strap spark plugs which never gain popularity or a large enough use to keep the company in business

Guess that would be me. "The older I get, the faster I went".

50 years ago JC WHITNEY was selling that type of plug. They were a cure all for every problem your engine had. LOL

Where does this leave plug-indexing?
I'm seeing more ground 'posts' blocking flame.

Only advance I can see right now is this plug will last longer because there's more ground area the spark can 'land'.

LOL, snake oil. Maybe try some Split Fires next?

As long as you have the right heat range and reach, all it has to do is make a spark.

I remember trying splitfire plugs many years ago and all i got was a lighter wallet out of the deal. The only bigger scam in my book is a cold air intake/filter on a stock car.

one of my favorites was the "hurricane" intake propeller thingy !

I love this web sight! Gives me a "procrastination" break from this.

You mean like every carmaker is doing these days?

Yep, cold air is not a scam.