Coil packs

[MustangSix]

I have some GM coil packs in the garage. Will EDIS drive these or will it be necessary to find Ford coil packs?

[brentp]

Hi,

The coil packs should work fine if the resistence of the primary and secondaries are within spec of the original ford module. I suspect that most are- I tested toyota and mitsubishi coil packs and they fell within range.

Now, what those values are I forgot. I will find out what that source is.

Brent

[Luca Lagonigro]

MSD EDIS Ford coils pack replacement:

BLASTER REPLACEMENT SPECIFICATIONS

Primary Resistance: .53 ohms
Secondary Resistance: 12.8K ohms
Maximum Voltage: 40,000 volts
Inductance: 5.8 mH
Turns Ratio: 83:1

http://www.msdignition.com/coil_blaster_13.htm

[Barry_D]

If anyone is interested, I have a new never installed "sat in a garage on the shelf" extra coil pack in the box. I won an auction on Ebay for 2 of them from a guy who was going to put both of these on his Mustang, but sold his car before he got around to it.

Since I have a four-cylinder this one's extra. It's a yellow and black "Accel" coil pack. It looks cooler than the Ford coil packs, and Accel claims it's a higher-energy coil pack. The best price I've seen on these is 54.00. I'll sell this one for 45.00 + 5.00 shipping.

1974 2002 BMW wide body w/many mods...
complete engine rebuild, f.i/turbo/MegaJolt
& MegaSquirt conversions starting now!
(=oo=)
Rock on Brent!

Barry Durham
barry@BMWupgrades.com
501 227-4365
http://www.BMWupgrades.com/
Coming soon...

[maddoldbugger]

hi, i am wondering if its posible to run the EDIS system with out the coil pack!! is it possible to use coil sticksin place of the coil pack?
i guess its a case of matching the values so it all fires correctly
thanks
tony

[Paratime]

Yes, you can pair individual "coil on plug" type coils. They would have to have a similar resistance with two in parallel, to a single coil pack. If not, you would have to build a custom driver circuit to prevent overloading the EDIS. However, firing the coils every revolution would defeat the purpose of individual coils.

[maddoldbugger]

thanks!! but would the megajolt be better for this? oe would it be better if i built a phase sensor to switch the coils and fire one at a time!
yes i know that there wouldnt be any electrical advantage by using coil sticks with wasted spark, but you dont have a big pack to remove to get to the plenum!
(bear in mind im using the 24v cosworth engine)
regards
tony

[Paratime]

>"thanks!! but would the megajolt be better for this?"


Sorry, would the MegaJolt be better for what?

>"oe would it be better if i built a phase sensor to switch the coils and fire one at a time!"

That would be a huge amount of work, since you would have to sense cam position and still keep the dwell sorted out...