Screamin' Demon Coil
2nd Gear Member
Joined: Apr 2011
Posts: 242
From: Texas
I personally bought the screaming demon pack with their live wires and the wider gap as recommended and personally I didn't feel any gain, in fact I wondered if it would miss on occasion, it didn't smooth my idle or anything they promise it cost me around 220 (100 pack, 80 wires and 40 plugs) and then an additional 40 for new stock gaped plugs and time to put the stock pack back on..
Idk about the 04 model but on our 4.0 I say DONT DO IT coulda saved me $180 plus the time I wasted.
Idk about the 04 model but on our 4.0 I say DONT DO IT coulda saved me $180 plus the time I wasted.
1st Gear Member
Joined: Apr 2012
Posts: 81
From: Manitoba
Ok, will the Demon Coil have any affect on my car's performance? Or are they just blowing smoke at me about this coil actually being a power booster?
(With the coil, I'd upgrade wires and plugs too)
My friend swears it will make a difference, but he had a '99 4.6L...
Thanks.
(With the coil, I'd upgrade wires and plugs too)
My friend swears it will make a difference, but he had a '99 4.6L...
Thanks.
Thread Starter
2nd Gear Member
Joined: Aug 2011
Posts: 166
From: Pennsylvania
I just put the coil, taylor wires, and regaped my current plugs. And I couldn't be happier. For one, there is improved throttle response, and my car pulls more in third gear now. Also, there was extreme drone with my Pypes Dual Exhaust system from 1000-3000 RPM, and the drone is completely gone. I only heard it last night going up a fairly steep hill.
Cut & Paste Expert
Joined: May 2007
Posts: 13,322
From: NW Arkansas
loosing their ability to deliver the full spark to the plug.
The outer jackets are cracking and are just good enough
to live thru the 3 year warranty period. Period.
I am still looking for a replacement candidate.
They will not be of the 'spiral core' design.
Thread Starter
2nd Gear Member
Joined: Aug 2011
Posts: 166
From: Pennsylvania
Hey, I didn't buy it at first either, but the drone is legitimately gone now. I put the coil on, wires, and opened the gaps on the plugs. So that means a more efficient spark and burn, right? Which means a slight power increase and better throttle response, so therefore, it makes sense with an increased power curve that the exhaust note changed.
4th Gear Member
Joined: Mar 2007
Posts: 1,227
From: tennessee
Foolish me, the drone was soo bad on my borla stingers, I put resonators on, then ripped out the entire interior and trunk and dynamatted, still drone... all I had to do was change the coil and plug wires.. .hahaha! (ends sarcasm)
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