Coil pack output voltage

Anyone any idea what the output voltage from the standard Thor coil packs are? Noticed the 90 with Ford coil packs from EDIS seem to give out a fatter spark than the Disco and toying with the idea of putting EDIS units in place now ready for when I finally get round to MS'ing her.

I believe the Ford EDIS runs at 40kv and I've been told (by a source that may not be completely reliable) that the Thor coil packs run at 30kv. Anyone care to suggest differently?

Thanks.

Yes the actual voltage would need to be measured at each plug.It depends on the length and resistance per unit of length of the plug leads,the plug gap and the compression of that cylinder. With a decent lead and an ordinary BPR6ES plug a Rover V8 will run happily on petrol or LPG showing around 7-10KV at the plug leads. The voltage will be higher if you use Platinum type plugs with a bigger gap,and more likely to misfire on a damp morning too.
Rover V8's were tuned to death with turbo's etc all when running on an old Lucas distributor. The accuracy of the trigger wheel system is what makes more power, not the higher KV of the spark.

Very interesting.