Well guys,
I just have to put my .02 in on this. But, before I do, let me answer Bob's question.
Just about any non-carbon core Plug wire will do better than the carbon-core stock wires, because they will last longer than the corbon-core wires. If you changed your carbon-core wires more often, you wouldn't see any degradation of the voltage coming out of your plug wires. Plug wires do not increase voltage/ ampreage. They just act as the conductor from the coil pack, to the spark plugs. The better the conductor, the less energy is lost through it.
Now on ignitation systems.
First of all, the ignitation system that is in our Explorers is already a hot system.
Unless you guys have added all the rest of the stuff, like Headers, Cat-back, Hi-flow cat,(KKM,K&N) Filter,High performance wires,larger throttle body and Mas, and last, but not least, chip, you shouldn't waste your money. It's not going to get more mixture into the cylinders. It's not going to get the exhust out of the cylingers faster, and it won't give you that much bigger spark than what your stock ingition will give you. The $400.00 you spent on it, won't give you the power that a set of headers will give you, for the same price. I'm not saying it won't help, I'm sure it will help, but for that kind of money, you should spend it on something that you know will give you the power you want. I'm telling you folks. The most bang for your buck is a set of headers. You should take care of the basics, like the exhust system, and the intake system first, then you can add all those trendy things later.
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Happy Wheelin'
Ray L.
97 XLT 4X4 4.0L SOHC