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I just "finished" (are these projects ever truly finished?) installing
an EDIS ignition system with a Megajolt (MJLJ/E) controller with the hard rev
limiter. The rev limiter is probably overkill for my use, but it can't
hurt.
I purchased the Megajolt controller from Autosport Labs
and got the EDIS-8, coil packs, stock Ford coil pack bracket along with
a 36-1 trigger wheel (which I didn't use) from a seller on eBay.
EDIS stuff is pretty common there, or at your local auto
dismantler. The Ford EDIS coil packs use a non-standard plug wire
connector, and I got them from Boost Engineering.
First thing after acquiring all the parts was to design a bracket for
the VR sensor and have it made up. It is shown in the photo below. The
material is 1/4" mild steel. The mounting holes are 3/8" diameter and
4" apart on centers. This matches the lower bolt holes on the timing cover.
The overall depth (distance from the timing cover to the front of the
mounting plate) is 1".
Then I had to figure out a way to get a 36-1 trigger wheel on this big
lump of iron. I could have had a little machining done and mounted the
Ford trigger wheel on the back side of the crank pulley, but I came up with a
different solution to this challenge. I bought a new vibration damper
from the nice folks at Summit Racing and had my fabrication shop
(Proto-Fab in Sparks, Nevada) cut 36 notches in the circumference. I
would remove the necessary tooth to get the correct 36-1 configuration
later. This tooth has already been removed in this photo. I could
have had them do this on the original factory damper, but I didn't want
to have the car down for that long. The photo below shows the VR sensor
bracket and the toothed damper both. The notch that is missing from
one corner of the bracket was a mistake, you don't have to do this. Note that after
you remove the tooth, the vibration damper will be slightly out of
balance. Either add some weight to the side that had the missing tooth
(if convenient) or drill out an equivalent amount of metal on the
opposite side.
The photo below shows the parts (before painting) mounted on a spare 440 block. The Yellow
line marks the tooth that had the 0° timing mark on it, and in this
photo it is aligned with the 0° BTDC mark on the timing tab. The red
line marks the position of the VR sensor when the crankshaft is at TDC
on #1 cylinder. Oddly enough, these are exactly 5 teeth apart, so the
tooth with the yellow mark is the one
that gets removed. If you don't want to remove the tooth that has the
timing mark on it, you can move the VR sensor one way or the other by
one tooth so that the removed tooth gets to be one side or the other of
the timing mark tooth. I won't tell you what stupid mistake I made
doing this! Do it this way, not the way I did it! I found that 8
thicknesses of Blue Painter's Tape is just about 1mm. so I put 3 pieces
of tape on the VR sensor when marking the position for the mounting
holes. This gets the sensor plenty close enough to the toothed damper.
The EDIS-8 module was mounted behind the grille in the area where the
old MoPar ignition module and alternator regulator used to be. I just
drilled and tapped the sheet metal for the 10-32 mounting screws. This
is on the starboard side of the car, just inboard from the headlights.
This is where the two coil packs need to find a home. Not a whole lot
of room here! Note the decapitated distributor. This needs to be here
to keep the oil pump drive gear in place. I plan to have Proto-Fab make
a dummy distributor stub to do this.
This is NOT a priority. I have since fabricated my own aluminium
dummy distributor stub.
These next two photos show the mounting points I chose to use for the coil pack bracket. The RED arrows point to the mounting holes.
The next two photos show the mounting bracket I made from the old Ford
bracket and some strap steel. Don't rag on my welding job... it was the
first time I ever used a wire welder. And it works!
These next two show the coil pack bracket in place.
And below is a shot of the coil packs snug in their new home.
And finally, a shot of the MegaJolt MJLJ/E unit in its nice cool glove box.
Yeah, a bit of a job, and more involved than absolutely necessary, but
it fits and everything is solid.
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