Screamin' Demon Coil Packs
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I've also been looking into them and have only heard that they don't do squat and it does make sense. They are made more for a higher revving RPM that I don't think you will ever feel in a 4.0. Plus, it's recommended to upgrade your wires which adds more cost to something you are not going to really feel, except in your head and wallet.
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Are you sure that's wise when running a supercharger?? Run the recommended spark plug gap when supercharging any vehicle, it's nothing like the stock Ford spec. Look at the gap on a Ford Lightning and compare it to a stock f-150 with the same engine and same model year truck....I believe it's .032 on a Lightning (1 heat range colder) and .058 and the same stock motor. I've seen major damage with the Mustang guys when running stock gap on a supercharged Stang.
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I've had no misfires or any other ignition issues. That's why I went to .060 and not .065. I've got an MSD DIS 4 coming as added insurance. As far as the heat range, I'm also running a H20/methanol injection system. I don't have any detonation either. I've had plenty of experience with supercharged Mustangs. And yes I ran smaller gaps with those. If the ignition is strong enough run as big as you can til the boost can blow out the spark and then go back down. The amount of boost would also be a factor. Once you reach a certain level, then definitely you would have to go back down on the gap. You have to experiment to find the best settings.
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