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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 01-30-2011
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Screamin' Demon Coil Packs

Ant thoughs? I've heard both good and bad things about them on 4.0 Cammers. Some people swear by them, others say OE is the better choice.
Thanks
MikeR
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Old 01-30-2011
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The one on my 3.0 was definitely an improvement and the people at the company are very nice. I'd recommend them in a second
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Old 01-30-2011
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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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Old 01-30-2011
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I found them on special at Underdog Performance for $59.00-I'm pretty sure that that's cheaper than I can get OE for. I'm ready for plugs and wires anyway.
MikeR
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Old 01-30-2011
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I just installed the 4.0 ohv coil pack in mine and gapped the plugs to .060. I didn't go with the full .064 because of the blower. The first tank of gas since I installed it went from an average of 19 to 21 mpg so far.
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Old 01-30-2011
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$59? Go for it then, that's cheap as hell.
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Old 01-30-2011
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I've just always been leary of going any different than stock on plugs and wires. Gapping different gives better mpg and more hp?
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Old 01-30-2011
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The theory is with a bigger gap and a stronger spark, you will get a more complete burn of the air/fuel mixture=more energy used. More power, better mileage. Unburned fuel=less efficiency. I'm a big supporter of Iridium plugs too.
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Old 02-05-2011
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there is no sense installing a a more powerful ignition coil if you are still using highly resistive spark plug wires

get yourself a good set of taylor LOW OHM resistance ignition wires 1st

then upgrade to the deamon coil pack at a later date
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Old 02-05-2011
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X2 on the Taylors. I run the PRO 409's on my Mustang.
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Old 02-12-2011
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i use the coil pack on my sohc and it works fine, i love it lol.
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Old 02-12-2011
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^^ any actual gains?
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Old 02-12-2011
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the seat of the pants feeling is the worst way to see gains, but i have no actual proof as far as gains as i have not dyno'd my truck. i would like to think i have gains tho.
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Old 02-14-2011
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Installed a demon in my truck using MSD super conductor wires and platinum ford plugs. Gapped to .063. Slight gas mileage increase, but the main thing i noticed was more stability of RPMs. Real smoothe. And i paid $100 for mine. Bugger.
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Old 03-03-2011
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Quote:
Originally Posted by rcmustang View Post
I just installed the 4.0 ohv coil pack in mine and gapped the plugs to .060. I didn't go with the full .064 because of the blower. The first tank of gas since I installed it went from an average of 19 to 21 mpg so far.
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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Old 03-04-2011
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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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