i have been reading up on these new e3 diamond fire spark plug. supposed to give you better fuel economy and performance. i was just wondering if anyone runs these plugs and have noticed any difference and whether on not they are worth the money changing them?

 

i dont have them yet but am getting ready to order some right now!

 

you should pull your valve covers and check your engine while (or before) you put those in.

 

pulling the valve covers tomorrow

 

They suck. Ive had around 80% of the sets i sell come back because they were fouled or the vehicle didnt run right. I had them in both my 03 neon and the wifes 01 caravan and they both fouled as well. E3 consoladates their numbers to cover more than one heat range, thats why they foul so often.

Another issue is the build quality if you look at the electrode it isnt always centered under the ground strap or the tops are cut at an angle so the gap is higher on one side than the other. The ground strap also is mounted in three places, that would hinder flame propogation. They are also coated with a crappy chrome that flakes off inside your engine.

I also recomend that you dont buy bosch platinum, platinum 2, or the 4+ . I dont know how bosch stays in business with those crappers on the market.

If you want a great plug for cheap the ngk v power is best, for platinum ngk g series are awsome and have a fine tip like iridium plugs.

Ok im done with my rant.

Also stay away

 

Billy ran E3s for a while and had no complaints.

It seems that most 3.7l and 4.7l owners find their engine runs best on copper core plugs, which are also the cheapest. I run one range colder, NGK 4644 V-Power plugs in my 4.7l. If you swap them out every 30k, you wont run in to any issues.

 

I run the autolite 3922 because of the nitrous, but the 3923 plugs work great, one heat range cooler than stock

 

Search function is broke so I bumped up an old thread on them. I ran them with the HO cams, Superchips, and 27lb injectors. They worked great in both my 4.7L and in the wifes E85 07 Durango 4.7L. They were way too hot for the supercharger though, lol, lol the truck was pinging like a diesel. I run two ranges colder with NGK plugs now.

Anyway here is the thread I bumped.
https://dodgeforum.com/forum/3rd-gen...gs-anyone.html

 

can someone explain to me what you mean dropping by one heat range means and its effect on the motor?

 

"The term spark plug heat range refers to the speed with which the plug can transfer heat from the combustion chamber to the engine head."
http://www.ngk.com/charglossary.asp?kw=Heat+range