FLMustangMan

I need to replace one coil pack so I might as well replace both coils and get new plug wires because the current ones are pretty old and not so great. With a supercharged application which will be the better buy or atleast the better buy for the price. I can get a MSD ignition kit (Coil packs and plug wires) for around $260. The Screamin Demon ignition kit (coils, plugs and wire looms) are around $340. Im on a tight budget but if the screamin demon is way better than I dont mind the extra money.

Also I've got Autolite Extreme Iridium spark plugs. They are left at the stock gap of .56. I have read alot of S/C apps. gap theres around .33-.36. Is this nesecary and why? Just so I have good facts as to why I am doing this.

Thanks

lizzyfan

Stock coil packs and FRPP wires

FLMustangMan

Can you explain why you say stay with stock. Just curious. And what kind of gap? Thanks

sn95_331_GT_ yellow

oh and on boost, you had BETTER run copper plugs...

stock coils and the FRPP wires as previously stated ~$150

FLMustangMan

Again, Can you explain why you say stay with the stock coils??????? and why had you BETTER run copper plugs??????? I bought the autolite extreme iridium awhile ago and paid around $65. So why should I change plugs. I had NGK iridiums for 3 years with my S/C. No problems.

An explanation as why I should go any certain way would really help me and any others who, like me, use this forum as a way to research.

Thanks so much for all and any help.

uberstang1

I run the screemin demon coil packs and they significantly cleaned up my idle, been running them for about 4-5 years now with no issues and I picked them up used. I run autolites iridiums gapped at .35 on my s/c setup.

FLMustangMan

So I have been looking on Summit and The screamin demon coils, http://www.summitracing.com/parts/DUI-31725/, are around $99 a pair. Then I found these, http://www.summitracing.com/parts/PRO-66959C/ for $28 each. They are basically the same but way cheaper. And then the only ones I see that are OE replacements are the Standard Motor Products, http://www.summitracing.com/parts/SMP-FD487/, for $72 each. These cost more than the screamin demon ones. I will probably just get the FRPP wires which are $78 for a set, http://www.summitracing.com/parts/FMS-M-12259-C462/, but why would some of you still go with the stock ones like lizzy and sn95_331_gt????? What is the benifit when the ones with alittle more performance are cheaper?????????

Thanks

FLMustangMan

anyone?????

uberstang1

Just get the demons if there cheaper. What there trying to say is that stock packs are more than sufficent, but if u can demons or msd cheaper just get them.

cliffyk

The notion that one should run "copper"¹ plugs with f/i is old line thinking, left over from the days when ignition systems were an inherent weak point and close gapped conventional plugs could provide a fatter spark under high combustion chamber pressures.

Fine wire electrode plugs fire too easily which created problems with high CC pressures and conventional ignition systems because of the lower energy potential of the old ignition systems. What happened was that the voltage needed to ionise the plug gap built up too slowly and would bleed down before the gap was fully ionised, leading to a weak spark.

Conventional plugs fire less easily and allowed ionisation voltage to build more fully when used with the older much weaker ignition systems.

The EDIS system used on the '96-'98 modulars, and the COP system of the '00-'04, both produce plenty of power to generate a fast, fat, and active spark with fine wire electrode plugs.

With EDIS is there is a bit (but not a whole bunch) to be gained with aftermarket coils, with the COPs the only reason to buy aftermarket coils is because they often cost less...


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¹ - So-called "copper" plugs just have a copper core conductor, the electrodes are plain ol' nickel/chrome alloy. The copper core is much more a marketing gimmick than a real enhancement--read more about fine-wire spark plugs here.