Anyone tried E3 (Diamond Fire) spark plugs? - Dodge Challenger Forum: Challenger & SRT8 Forums
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Performance Modifications Want to talk about performance modifications for your Dodge Challenger? This is the forum for that. Anything from exhaust systems to power adders and everything in between. (Dodge Challenger Performance Modifications)

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Old 05-12-2009, 05:48 AM
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Anyone tried E3 (Diamond Fire) spark plugs?

Seems to be a lot of buzz about these plugs, but was wondering if anyone has tried them and seen any difference. They aren't that expensive so if they really do give you another 5-7HP, that wouldn't be bad at all.
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Old 05-12-2009, 06:36 AM
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Old 05-12-2009, 06:58 AM
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I e mailed High Horse Performance a while back and asked them about those plugs. They told me “they are junk”. It was then suggested to use NGK.
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Old 05-12-2009, 07:11 AM
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Snake oil, spend your money elsewhere
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Old 05-12-2009, 07:21 AM
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Interesting...

Horsepower TV last week had a piece they did about upgrading a 5.7 Hemi Charger cop car, and they used those plugs. I reviewed the piece last night, and they claimed an 8hp gain in "previous tests."

Now, I don't believe everything I see on these shows, because I know they do their sponsors' bidding, and I didn't see the section where they tested these plugs, but I do remember seeing other shows where they tested inexpensive power adders like synthetic oils and plugs, and verified the results on the dyno... and while dynos may not lie, they certainly differ in the way they report performance...

As for me, I'm still using NGKs, and waiting to see if MSD will come out with a system for our dual-plug Hemis...
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Old 05-12-2009, 08:33 AM
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It is snake oil.

There is only one spark, it can only travel from one location to another.

The E3's and other multi-tip designs are actually worse because they are impeding the travel of the combustion in one direction which can cause damage to a vehicle.

A good set of normal spark plugs, perhaps iridium, or a different heat range is better for a vehicle then the others style.

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Old 05-12-2009, 08:53 AM
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I've seen reports on these as well. They were showcased on Horsepower as well as Gearz. Both shows claimed they added horse power.

However, I agree with the above that a spark will travel the path of least resistance. A spark plug isn't going to fire three different arcs just because there are more electrodes. The spark will only travel to one at a time. It's simple physics.

It is possible that these E3 plugs have a different electrode that may provide a slightly stronger spark, but until I see one in action under a slow motion camera compared to a standard NGK, I'm also going to say snake oil.

OR, back to back dynos showing more than a variance in HP.
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Old 05-12-2009, 12:00 PM
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If I remember right, the claim wasn't that you got multiple spark paths (which as said above wouldn't happen), but that the hole on the center of the plug (where the electrode tip would normally be) allowed the gases ignited by the spark to exit directly into the cylinder, instead of being blocked by the the tip and having to go around. Doesn't seem like a big deal, but you never know, sometimes small changes can have big effects.
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Old 05-12-2009, 01:06 PM
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Those are yet to been seen by an independent testing company that I can find. But just like Iridium plugs, NGK's, platinum plus and all the others were touted as snake oil as well until they had been around a bit and tested. At $400 dollars for a set of 16, I am in no real hurry to try them out for that 8 hp unless I see it for real.
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Old 05-12-2009, 01:17 PM
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I saw the same Horsepower TV episode so when it came time to change my plugs in my Tahoe I forked out the extra money for the E3 plugs. What sucks is my average miles per gallon has dropped a full mile from 15.3 to 14.2 and I'm made no other changes to the car. It is the only thing I can think of. A set of 8 plugs set me back about $60 including s&H.
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