Screamin Demon progress on stock 4.0 - Ranger-Forums - The Ultimate Ford Ranger Resource


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

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Old 07-26-2007
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Screamin Demon progress on stock 4.0

I've been wanting a Screamin Demon for my truck since Maurice's thread, I want to see how it will affect a stock 4.0. I finally hit up underdog-performance for one along with some 8mm wires, and I picked up a set of Autolite double platinums. I will be installing everything this weekend and will update this thread as things progress.

EDIT (7/31/07):

I finally got to drive my truck with the new set up last night and this morning, and it's nice! I totally agree with Maurice's results, better idle, pickup and acceleration. I'll have an idea of highway gas usage this weekend on my Buffalo trip.

My last fill up before coil change was 16.5mpg mixed city and highway, I usually get ~18mpg at ~100% highway.

(8/10/07) Filled up last night - 17.5mpg mixed driving

Last edited by sambob117; 08-10-2007 at 07:34 AM. Reason: Update
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Old 07-26-2007
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Please do keep us updated. I'm interested in this. btw, how many miles on your truck?

Rich
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Old 07-26-2007
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good call...
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Old 07-26-2007
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It's about to turn 49k
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Old 07-26-2007
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I am interested in seeing the results as well....
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Old 07-26-2007
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x2...

Maurice how did it help your truck?
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Old 07-26-2007
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it helped quite a bit.....smoothed out the idle, acceleration, and general running.....
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Old 07-26-2007
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If i decide to get a screaming demon coil pack for my ranger, do i need anything else to go along with it? or just drop in the pack and away i go?
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Old 07-26-2007
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Quote:
Originally Posted by i_luv_strats
If i decide to get a screaming demon coil pack for my ranger, do i need anything else to go along with it? or just drop in the pack and away i go?

I would swap plugs and wires at the same time. It is recommended to change the GAP on your plugs, so you might as well change them, IMO.
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Old 07-26-2007
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drop in the new pack and go...
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Old 07-26-2007
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ok, cool, thanks for the info.
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Old 07-28-2007
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don't you have to re-gap the plugs?
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Old 07-28-2007
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Hey Maurice, did you regap your plugs or no?
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Old 07-28-2007
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Quote:
Originally Posted by DangaRanger99
Hey Maurice, did you regap your plugs or no?
he did, yes
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Old 07-28-2007
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I installed my coil pack, 8mm wires, and new plugs i regapped to .060 a few months ago. And i can say i didnt notice a lick of difference in anything.
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Old 07-28-2007
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I put one on my truck recently and haven't seen much of a differance either. My old coil pack had lots of miles on it, so i figured i would give one a try. I have not checked my mileage with it yet but will soon.
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Old 07-29-2007
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will one of thoes fit onto a 94 4.0?
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Old 07-29-2007
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yes i regapped my plugs.....they are sitting at roughtly .065" gap in them....my stock gap was .054".....
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Old 07-29-2007
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You stock gap is probably .65 anyway. My 04 stock gap is .065 so a coil pack would have done nill difference.

Quote:
Originally Posted by mudranger96
I installed my coil pack, 8mm wires, and new plugs i regapped to .060 a few months ago. And i can say i didnt notice a lick of difference in anything.
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Old 07-31-2007
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Update!
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Old 07-31-2007
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man i need one........im broke 4 now
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Old 08-10-2007
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Update
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Old 08-25-2007
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put a sd pack in my ranger today, acceleration was a bit quicker, startup was fast and the idle seemed stronger, must finish tank of gas with seafoam then a tank of regular gas and see what changes i get.
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