The 3.9l's aren't coil on plug engines. In fact they still use a distributor to deliver spark and syncronize the fuel injectors. Oh and they don't use knock sensors either. In fact coil on plug engines weren't really that popular until 2000 and newer models because they weren't demanded by the EPA until around that time so that each individual cylinder on an auto engine could individually be controlled. It won't be that long until each cylinder has it's own O2 sensor...
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I said:
"Testing coil-over or computer controlled engines at wide open throttle for what spark plug works best is very close to worthless." The adaptive memory can up-date it's self so fast that before an engine is fully up to speed, it can recalibrate fuel and spark schueduling making claims that the power gain from a spark plug worthless, just picture a partial misfire , and the computer broadening the pulse width of the injector, resulting in more HP,,,,, again, an incomplete test.
It was your motor wizard that said he got better gains from the E3 plugs in coil over engines, Here is one of his quotes from your link:
"We have been testing the e3 and halo the most
amazing resaults we are seeing are in the foren
motors and the coil over setups 1 to 3 mpg gains
and 5 to 10 hp "
Like I pointed out, you have to know or have understanding as to how the burning fuel travels through the combustion chamber to see why this helps. The E3's "spray" the fuel burn outward into the center of the combustion chamber via the restrictions or shroudings of the horse shoe shaped ground electrode (Imagine how a fuel injector sprays outward - The E3's using the right shrouding do this). If Bosch had this on their quad 4's and so on it would do the same thing. A tradition plug sends the fuel burn outward from the opened side of the gap of the plug. This is what makes the E3's so effecient. They focus the burn where it matters --- in the center of the combustion chamber.
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If you would like to explain why you don't think I understand how a cylinder fires?
Just because I think that E3 plugs are a complete rip-off and a waste of intellectual gains, dose not condone an incomplete understanding of the finer points of an internal combustion engine.
In fact, I do believe the engines in your description would be predestian to extreme combustion pressures, incomplete combustion and / or possible detonation? If "spraying" the flame front worked, it would surly detonate.
My understanding is that fuel burns more like particles of dust in a granary fire, from one particle to the next, a granary fire will push the walls of a granary out very far, but not as far as if the granary exploded.
By dyno proven I am referring to both carbureted and fuel injected engines done by engine builders throughout... The website I pointed out was comparing the same heat range "even though it's colder than what the engine calls for" of make of plug to make of plug. The E3's obviously beat the competition.
Like I said before. If I had a demo or video of some sort showing you what I'm talking about you would understand it then, but I don't have any videos like that here that shows how fuel burns in the combustion chamber...
Having ran a lot of engines on dynos, I know that I could prove a gain with E3 plugs, if I cheated the test, sort of like people that tested the "Tornado" thinggy that goes in the air-filter to spin the air around to get better mileage, bunk! The first test was at 55MPH,,,,, after the "Tornado" the test was at 65MPH,,,,whalla, more HP! (cheating bastards)
I do feel a need for exposing scams, gas prices going up, some on fixed incomes would be easy pray to vultures that would love to have a few extra million laying around from selling scam spark-plugs
Here a simple BS test that can be applied to most mileage improving scams:
Economy hardly ever comes with more HP, unless something was inadequate to start with!