Ha ha. I love this thead! Why Ice a Turd?
Why indeed? Well over here, the advent of propane conversions has made understanding EDIS essential for every Kiwi or Aussie mechanic. Lots of people have been using US Impco propane kits, and Ford OZ then had a huge problem with backyard mechanics putting special cams into there 4 liters sixes, and then having massive problems with the sparking system. My background is propane systems on the 1982 141 hp Falcon 250 six, and a propane turbo conversion on a formerly 110 hp Cologne V6. Each of theses came with stock Duraspark systems, but had factory EDIS systems you could retro fit. I did two system set-ups back in 1996, and again in 2000, and I can tell you, a nice distributor is the best idea, or you'll have a legion of other issues to contend with.
Bearing in mind I'm with FSD on the concept that if you are basically competent on ignition, there is no place for EDIS on a log head six. I'd say the advantages are minor if you know how to set up a Motorcraft or DUI distributor, and dollar for dollar, EDIS is spit polishing a log. I'd add that the stock 1973 to 1983 Ford Duraspark is pretty much the best ignItion money can buy, and that for 90 bucks labor, any reworked Duraspark will piddle all over a backyard EDIS set up because when you add another level of complication to ignItion, screw ups are common. So if you running a triple carb six, and you don't know what your doing, an EDIS system will most likely give you the extra rope you needed to hang yourself. That's like me warning a motorcylist that there is a low hanging piano wire with EDIS. It can take you down, and when the system goes down, you need an EEC 5 fault code list to find out what the problem is. So I see EDIS systems as a dangerous portal to trouble for anyone who doesn't understand the basics of ignition.
However, here are the advantages.
Firstly, Because Ford Australia went down this road some time ago with its 4 liter OHC 6, and you can fit a 1998-2002 AU Falcon part to
any 1960 to 1983 log head engine block, and
totally eliminate the distributor using standard Ford Australia Geelong six or Ford USA Cologne V6 engine parts.
Ford OZ actually had serious managment issues with how they went about lost spark...they even had 3 versions of now you see it, now you don't distributor and EEC system changes from 1993 to 1998. It was a turbulent time when one week a Falcon had EEC 5 EDIS, then it reverted to EEC 4 non EDIS, then back to EEC5. If you had a Falcon pickup (X-series ute based on the US Falcon Ranchero chassid), it had four differnet kinds of igntion set up during the 90's.
But the system itself is world class, a step up even on the seriously smart 48 degree adavance GM 3800 system which yields such terrific results in those old 90 degree port efi front drive Buicks.
The second reason for EDIS 6 is for the same reason racing BDA's respond to lost spark ignition...the stock distributor on X-flows and Super charged Log head engines is in a dopey location, and the electronic system just sings when set up right on a high winding engine! When you add an M90 or turbo, inject, or triple carb an X-flow, the factory EDIS stands out if its set up correctly.
Third is that the conversion to waste spark is sooo easy, see Page 1 from 02-04-2007 of KLR 250's 27 page epic on
http://www.xfalcon.com/forum/showthread ... -The-build.
Specifically, the later X, E and A series Fords ( 1994-1996 XG, 1996-1998 XH, 1993-1996EF, 1996-1998 EL, 1998-2003 AU) harmonic balancer parts and triggers bolt right on the non cross flow and x-flow blocks from 1960 to 1993. 33 years and 4 million Aussie Falcons to retrofit, using technology which was rock solid stable and supremely reliable in all 600,000 Falcon 4 litres sixes made from 1993 to 2002.




Fourth and last reasons. Waste spark engines comply with emissions and are easier to tune and keep in tune
if you follow the rules. Like any system, if you can do better with less, then you don't need to go to EDIS. I won't go into all the things that can go wrong with EDIS, though. If you fail to follow the factory Australian or US Ford six system, your gonna be chasing your a*** fixing a plethora of problems, and you have to then consider what your going to do to manage the system. EEC 4, EEC 5, or something else like Megasquirt or an aftermarket system. I'll repeat again, The advent of propane conversions has made understanding EDIS essential for every Kiwi or Aussie mechanic.