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Screamin Demon Coil

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  #1 (permalink)  
Old 26 Oct 2011, 08:10 pm
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Default Screamin Demon Coil

I just noticed that Screamin Demon coil says that you can gap your iridium plugs up to .60, 1. Is that correct, 2. Has anyone ever gaped them that wide, 3. If so does it run rough at idle, 4. What would be a normal gap for a iridium plug. Thanks Steve
06 PT LT Turbo, Back Doors welded in, Glass out, PTzed
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Old 26 Oct 2011, 08:26 pm
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Default Re: Screamin Demon Coil

Stock gap is .040 and why are you using that coil? The OEM is better
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Old 26 Oct 2011, 10:21 pm
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Default Re: Screamin Demon Coil

yeah xtrm is correct, the factory coil is proven to be the best. Others fail due to heat. On turbos .40 is the largest to go. Higher boost levels require gaps as low as .28-.30 as it can actually blow out the spark. causing misfires.
2004 Almond GT, autostick - Only car shows, some weekends but with Stage1!
2003 cranberry 5 speed GT - Fishing with a sleeper Stage3 setup!
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Old 27 Oct 2011, 12:08 am
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Default Re: Screamin Demon Coil

PT Cruiser Firepower
what about using the entire system offered by performance distributors that includes the screamin deamon coil plug wires and this min vip thing that I've personally never heard of before but sound interesting.

you can try out

MPx Heat Shield - Ignition
an decent looking heatshield created by modernperformance.

though I do know that modern performance says they like the grantelli plug wires for they are the lowest resitance plug wires they have tested.

Granatelli Spark Plug Wires 03-05 Neon SRT - Ignition

but I have heard people on here like the screamin demon plug wires or livewires or whatever.

2003 Dark Blue Non-Turbo Pt Cruiser w/ 5 speed
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Old 27 Oct 2011, 08:35 am
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Default Re: Screamin Demon Coil

On SRT forums the Screamin Demon coil has a very poor history and many failures leading owners to waste a lot of money and time diagnosing the problem.

Factory coil is fine, save your money!

86 TurboZ CS 2.2 T2 +20's A555
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03 PT GT Black 5 sp Stg 1 sold
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Old 27 Oct 2011, 08:40 am
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Default Re: Screamin Demon Coil

Heat shield will not fit under the PT's intake. You can make one fit though but there is so much heat allready trapped under the intake a shield would actually hold even more under it.

The NA doesnt have anywhere close to the same amount of heat so aftermarket coils may improve performance?

You will find many threads about what has been tried before and nothing but problems down the road as said above. The stock is the only one to use unless you want headaches sooner or later.
2004 Almond GT, autostick - Only car shows, some weekends but with Stage1!
2003 cranberry 5 speed GT - Fishing with a sleeper Stage3 setup!
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Old 27 Oct 2011, 10:42 am
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Default Re: Screamin Demon Coil

Take care on the nifty aftermarket plug wires, too. I'd strongly recommend Standard Motor Products OE Style wires.
A little resistance is nothing for even an old point style ignition, letalone a modern one.

BAD experiences taught,
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Old 27 Oct 2011, 01:57 pm
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Default Re: Screamin Demon Coil

OEM coil is excellent. People running up to 600hp on the srt with it. Screamin Demon coil is crap. I'm using MSD wires in my stock GT and my modified srt-4. These wires work great.
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Old 27 Oct 2011, 05:18 pm
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Default Re: Screamin Demon Coil

Here's my history to date on wires, forget the coils as if you go other than Mopar you're just wasting your money:
  • September 2007 - Factory wires measured with 2938 miles on them at 4458 ohms average.
  • March 2008 - Factory wires measured with 17998 miles on them at 16210 ohms average! Rubber was feeling stiff, obvious heat damage.
  • May 2008 - Installed Crane Firewires, measured new at 175 ohms average.
  • November 2008 - measured Crane Firewires with 22782 miles on them at 372 ohms average.
  • February 2009 - measured Crane Firewires with 43273 miles on them at 687 ohms average, slight stiffness in the feel, possibly heat related.
  • March 2009 - Installed Granetelli's, measured new at 3.7 ohms average.
  • September 2009 - measured Grans with 51892 miles on them at 11.8 ohms average.
Now, I went and visited quite a few race shops here in Mooresville, all Nascar sanctioned teams, and spoke with them about the wires they use. Quite a few use Vision Motorworks Pure Silicone 10.2mm wires. They supposedly hold up to heat, pass no RFI at all, and even though they have on average 1 ohms resistance the guys say they are better than the Grans. So one of the shops made me a set to try out. I've not installed them yet as I want to wait and see how the Grans are going to last. You can see they've almost tripled their impedance since I installed them. My opinion, even though the z/ohms is still low, tripling the numbers can't be good, don't care how low they are.

So, going to watch my Grans for a while but I'm really starting to get a bit antsy and want to put these Visions on my car to test out. I had posted somewhere in the past the info on these wires right after they made them for me.

Here's the Visions they made for me, been sitting on them for almost two years now:

If you want any more info, let me know and I can post the same comparison test that I posted over on PTCrew.
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Old 27 Oct 2011, 05:56 pm
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Default Re: Screamin Demon Coil

Chromenut, those wires look awesome! Any idea on a price for a set?

2001 PT Cruiser 5-speed; 1976 Oldsmobile Cutlass S; 1990 Chevy 454SS; 1995 Caprice Classic woody
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