Re: Tuners Room...
Bill - An EDIS module would work OK for you, but it'll also run at locked timing unless you use either a Ford EEC computer to send it the necessary, one-wire "Spark Advance Word" (conveniently labelled SAW on a wiring diagram) to control timing advance. You are correct, the 36-1 EDIS wheel and reluctor sensor would need to be mounted on your crank pulley/balancer/whatever.
Honestly, though, I think the EEC / EDIS combo just for ignition would be more parts, and more tuning work, than necessary. To get your own timing curve you'd need to use Tweecer or similar tuning tools to modify the spark tables in the EEC computer. THis alone will cost as much as a basic megasquirt. What I'd do in your position is find myself a set of Ford 4-tower coilpacks, OR a pair of Mitsubishi 4-cyl coilpacks and their mating Ignitors(the hottest OEM coils that were ever made, and easily found in junkyards on Hyundais, Chryslers, Mitsubishi, etc.)... then mount the EDIS wheel and reluctor. Feed the reluctor signal straight into your megasquirt, and have the megasquirt control the ignitors / coils directly. The reason not to use an EDIS ignition module is: they have a fixed RPM rev limit, and you cannot use ignition features with it such as 2-step rev limiting, boost builder, etc.
What we're describing here is exactly what's been set up on Chad Reynolds' "Rusty" wagon. The only difference is that we upgraded from a reluctor sensor, to a GM Crankshaft Positon SEnsor reading the EDIS wheel. Because the GM sensor has built-in electronics to convert the magnetic signal to a square wave output, which is less noise-sensitive. Chad, do you have any pics of your setup online?? Bill should see this.
-scott
Originally posted by BillBallinger Sr
Honestly, though, I think the EEC / EDIS combo just for ignition would be more parts, and more tuning work, than necessary. To get your own timing curve you'd need to use Tweecer or similar tuning tools to modify the spark tables in the EEC computer. THis alone will cost as much as a basic megasquirt. What I'd do in your position is find myself a set of Ford 4-tower coilpacks, OR a pair of Mitsubishi 4-cyl coilpacks and their mating Ignitors(the hottest OEM coils that were ever made, and easily found in junkyards on Hyundais, Chryslers, Mitsubishi, etc.)... then mount the EDIS wheel and reluctor. Feed the reluctor signal straight into your megasquirt, and have the megasquirt control the ignitors / coils directly. The reason not to use an EDIS ignition module is: they have a fixed RPM rev limit, and you cannot use ignition features with it such as 2-step rev limiting, boost builder, etc.
What we're describing here is exactly what's been set up on Chad Reynolds' "Rusty" wagon. The only difference is that we upgraded from a reluctor sensor, to a GM Crankshaft Positon SEnsor reading the EDIS wheel. Because the GM sensor has built-in electronics to convert the magnetic signal to a square wave output, which is less noise-sensitive. Chad, do you have any pics of your setup online?? Bill should see this.
-scott
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