Are there any newer Ford EDIS modules that can be used and do I need any
 of
 the other parts of the ignition system ?
 The biggest junk yard here doesn't have any cars later than 1996.
 --
 Karibian


 Karibian, 1995 is the last year for the stand alone EDIS system which
 started in 1988 as the replacement for the DIS system. In 1996 the EEC-Iv
 engine computer (60 pin connector) was relaced by the EEC V  (104 pin
 connector) which had the edis function added to the engine computer. For a
 rotary you need a 36 tooth reluctor wheel, two VR (variable reluctance)
 pickups and two EDIS-4 ignition controllers a 4 coil pack (Ford or Accel),
 and the plug wires. mount the VR sensors 7 degrees apart so that one EDIS
 fires 20 degrees BTDC and the other set fires at 27 degrees BTDC, Have a
 slotted hole mounting plate for the VR sensors for +/- 4 degrees on the
 fixed timing. Feed the two EDIS modules on separate breakers for a
 completely redundant ignition. Power will be down some on a single
 ignition.
           The application of these parts is well documented all over the
 internet, you should research this yourself for a better understanding of
 how many teeth before TDC the missing tooth of the 36 tooth sprocket is
 mounted, clearance of the VR sensor, 8000 RPM limit of operation. This is
 a
 very simple reliable system with only a few wires to sort. Thed EDIS 4
 module is available new from autoparts stores for about $37, Accel coils
 packs are about $69 and the VR sensor is about $18 Everything new for a
 redundant 2 rotor  with plug wires is about $240.
       I plan on using a Ford EEC IV system on the four rotor and am using
 the EDIS 8 to get enough trigger signals to match the 80MM MAF sensor and
 eight 19 pound injectors and two EDIS 4 modules to run the ignition
 separately so that the EEC IV computer max RPM function won't reduce the
 ignition timing. Except for an inline potentiometer on the MAF 4.7 volt
 maximum input to allow lean cruise mixture the EEC IV will be all stock
 programming.


 george grimes


Wouldn't this setup have wasted spark on the trailing plugs?  I thought
that
was a no-no.  Maybe I'm visualizing what you're saying wrong.

Everett



Everett,    I am proposing using two of the EDIS controllers , one at 20
degrees and one at 27 degrees BTDC firing two plugs each from the 4 coil
pack. I intend to drill a piece of aluminum barstock  tapped with 4 blind
holes for the waste spark plugs to complete the coil circuit. These will be
the waste spark plugs. There is a signal generated by the EDIS sensing the
field collapse of the coils to verify that the plugs are firing. If a plug
doesn't fire for a few seconds The EEC-IV would let the EDIS run on it's 10
degree BTDC    Since I am using the two ignitions with fixed advance. I am
not using the  variable ignition advance so there is no connection to the
ECU making the check  signal redundant.The waste spark plugs may be
necessary for the tach output from the EDIS  to be correct. The EDIS also
fires 3 times below 1800 RPM and once after that RPM.

george grimes