C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

E3 Spark Plugs

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Old Jul 30, 2009 | 10:41 AM
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Default E3 Spark Plugs

Anyone use these. I saw a dyno test on TV where just changing out stock plugs for these added 5 HP. They are $5 a piece but $40 for 5 HP ( if its true) would be the cheapest 5 HP you could get.
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Old Jul 30, 2009 | 12:23 PM
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Originally Posted by Shimy86
Anyone use these. I saw a dyno test on TV where just changing out stock plugs for these added 5 HP. They are $5 a piece but $40 for 5 HP ( if its true) would be the cheapest 5 HP you could get.
I call BS. I think they rigged the test. You can't get 5 HP from plugs.
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Old Jul 30, 2009 | 01:12 PM
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I would be surprised if plugs yielded 5HP. Just get some standard plugs and spend the rest of your money on a complete tune-up
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Old Jul 30, 2009 | 01:42 PM
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The car is already good to go. The test was on Horsepower TV on Spike. They said they compaired several different aftermarket plugs. They showed the dyno results showing the gain, running the test with the same engine temp, air temp, blah blah blah, all variables were the same and just the plug change gained 5 HP. I am skeptical also but I've spent (wasted) much more on performance stuff before. I got a set this morning and will be putting them in tonight. The passanger side is a pain in the *** to change and that was holding me back much more than the $50. Going to the track this weekend, I'll let you know what the stock 86 with the 4+3 runs in the 1/4. It will be its virgin run on the track
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Old Jul 30, 2009 | 01:46 PM
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Originally Posted by Shimy86
The car is already good to go. The test was on Horsepower TV on Spike. They said they compaired several different aftermarket plugs. They showed the dyno results showing the gain, running the test with the same engine temp, air temp, blah blah blah, all variables were the same and just the plug change gained 5 HP. I am skeptical also but I've spent (wasted) much more on performance stuff before. I got a set this morning and will be putting them in tonight. The passanger side is a pain in the *** to change and that was holding me back much more than the $50. Going to the track this weekend, I'll let you know what the stock 86 with the 4+3 runs in the 1/4. It will be its virgin run on the track
You'd have to make a run and then change it for things to be about as consistent as possible.
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Old Jul 30, 2009 | 03:43 PM
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My 86 ran 14.50 stock, my current best is 13.38. I'd be real surprised if the plugs made any difference, but I'm sure HP TV got paid for their commercial.
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Old Jul 30, 2009 | 04:40 PM
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I tried one of these in my circa 1975 lawn mower (briggs & stratton 12 hp single piston carb'd engine) -- the E3 plug has a squareish hole in the middle of the ground electrode, similiar to a 'v' grove plug.

Whereas I did notice a bit less gas smell while running (as if burning a bit better), I also noticed a bit lower RPM's at full throttle (as if the burn pattern was not correct for the cylinder) -- this was even after adjusting the high-speed needle for the plug change.

When I pulled the plug (to try to a B&G platinum plug), I noticed one side of the E3 plug was burning correctly, but the other side was a bit carbon'd-up -- possibly due to a very slight gap difference between sides, or just a result of its burn pattern or spark pattern.

Also, after putting in the B&G platinum, the engine's max RPM returned to its normal 'pitch'.

So, whereas the concept appears to be a improvement to a normal plug, the tradditional spiral burn pattern within the cylinder might be altered and net nothing (or worse), especially if the piston has any sort of design to help with the burn pattern.

Bottom line -- I would NOT recommend these plugs.
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Old Jul 30, 2009 | 04:41 PM
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I run the e2's. They did raise my mpg and smoth out my idle. I would have bought the e3's but they wen't in stock.
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Old Jul 30, 2009 | 05:15 PM
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Were they comparing to another new set of plugs, or to stuff that had 50k+ miles on it? Going to just about ANY new, properly gapped plug from something worn and crusty will yield 5HP.

More importantly... was there a "Promotional consideration provided by..." message at the end of the show for them?
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Old Jul 30, 2009 | 05:27 PM
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Originally Posted by TravisD
Were they comparing to another new set of plugs, or to stuff that had 50k+ miles on it? Going to just about ANY new, properly gapped plug from something worn and crusty will yield 5HP.

More importantly... was there a "Promotional consideration provided by..." message at the end of the show for them?

E3 is a sponsor of the Power Block. Take it for what it's worth.
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Old Jul 30, 2009 | 05:55 PM
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Originally Posted by theadmiral94
So, whereas the concept appears to be a improvement to a normal plug, the tradditional spiral burn pattern within the cylinder might be altered and net nothing (or worse), especially if the piston has any sort of design to help with the burn pattern.
I'm not trying to 'jack the thread but your comment reminded me of something I was exposed to with small dirt bikes in my youth. There was a practice of using different thickness crush washers to index the plug so that the air gap faced the center of the combustion chamber. Maybe it only makes a noticable difference for small two-stroke engines but the conventional wisdom at the time was that it was worth the hassle of pulling the head and fiddling with washers. Anyone ever hear of this?
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Old Jul 30, 2009 | 06:02 PM
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Originally Posted by Bad Karma
E3 is a sponsor of the Power Block. Take it for what it's worth.
Just another "gimmick" spark plug.
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Old Jul 31, 2009 | 10:53 AM
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Originally Posted by 94z07fx3
I'm not trying to 'jack the thread but your comment reminded me of something I was exposed to with small dirt bikes in my youth. There was a practice of using different thickness crush washers to index the plug so that the air gap faced the center of the combustion chamber. Maybe it only makes a noticable difference for small two-stroke engines but the conventional wisdom at the time was that it was worth the hassle of pulling the head and fiddling with washers. Anyone ever hear of this?
It is a way to increase the spark efficiency in a 2-stroke, many snowmobile racers use it. I dont know if it helps or not but if you do any racing you know that if your into it you try EVERYTHING that comes along. Even if the gain is very minimal, every little thing that gives you an edge for little cost is worth trying.

That was my thought with these plugs, if they help at all, what the hell. As stated earlier, I've pissed away a fortune in snowmobile performance parts, whats $50 for plugs for the vette
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Old Jul 31, 2009 | 11:08 AM
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The E3's do work, but as far as the 5hp claim, you wouldnt even be able to feel the difference. You will notice better gas mileage as its a more efficient plug.
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Old Jul 31, 2009 | 02:03 PM
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5hp at the crank = 4 RWHP---guess it's better than nothing



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Old Jul 31, 2009 | 02:16 PM
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Originally Posted by 94z07fx3
I'm not trying to 'jack the thread but your comment reminded me of something I was exposed to with small dirt bikes in my youth. There was a practice of using different thickness crush washers to index the plug so that the air gap faced the center of the combustion chamber. Maybe it only makes a noticable difference for small two-stroke engines but the conventional wisdom at the time was that it was worth the hassle of pulling the head and fiddling with washers. Anyone ever hear of this?
Yes, I have some serious drag race friends that index their plugs.
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Old Aug 3, 2009 | 11:10 AM
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I saw the same dyno test and what really interested me was the reduction in emissions along with the hp boost. The reduction in emssions was significant. We have emissions tests here and if there is anything to their test results it might be worth a try. If there is nothing to these spark plug tests, why are you guys buying $6 plugs instead of $1.49 plugs?

I also gave considerable scrutiny to bigger/better wires. Some companies advertise significantly lower resistance in their wires. Some, like Taylor and Knowledgy, even give exact numbers and claim hp boosts. I can appreciate better insulation and resistance to heat for longevity. I can appreciate doing the job right the first time. But where do you draw the line? Why Gm reds and not XX mm Taylors?

Maybe a stupid question but, would you get similar test results by changing out to hotter plugs?
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Old Aug 3, 2009 | 11:21 AM
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By the way, this is interesting reading.

http://www.magnecor.com/magnecor1/truth.htm


I also spelled Kowledgy wrong, it is correctly spelled "Nology"
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Old Aug 3, 2009 | 11:58 AM
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Originally Posted by Paul Ruggeri
My 86 ran 14.50 stock, my current best is 13.38. I'd be real surprised if the plugs made any difference, but I'm sure HP TV got paid for their commercial.
bingo.....I saw the same episode, and E3 is a paid sponsor. Hard to trust the result when the item your testing is paying for your show.....
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Old Aug 3, 2009 | 02:51 PM
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I put them in and who knows if the car has any power gain but it did pick up 1.5 MPG. Ran it at the track and it's best was 14.508 at 97 MPH. Tons of fun but these old C4's are NOT drag racing cars, a "stock" 95 was there and he was in the high 12's all day.
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