So, pins 10 and 12 are actually coil - pins then?

And pin 4 seems to have no use for me. Correct?

Here's the wiring diagrams that I used:
http://www.megasquirt.info/ms2/EDIS.htm

scroll down and the diode circuit to hook up the tach is there too.

When I first hooked up the tach circuit as shown, it worked as long as I had a meter connected to where the three diodes are connected together. When I removed the meter the tach misbehaved. Adding the resistor fixed it.

tim
_________________
1973 '02 w/megasquirt-II and COP EDIS ignition

http://www.hbci.com/~tskwiot/2002.html

The wiring diagram is really straight forward. I've built my harness, I used some coax braid and ran two wires in it for the saw/pip wires as well as the VR sensor. Can't wait to get things test fitted in the car. Where did you install the coilpack?

Just kidding -- but I only had the coilpack on for a few hours in order to connect my timing light and verify the VR sensor position. It was bolted up in front of the washer bottle/above the charcoal can.

I'm running late model BMW coil-per-plug coils:



test fitting on a spare motor:



tim
_________________
1973 '02 w/megasquirt-II and COP EDIS ignition

http://www.hbci.com/~tskwiot/2002.html

How do you determine where the missing tooth ends up @ tdc? I'm still reading. How are you wiring the coil-per-plug coils? I was thinking of doing the same thing :)

missing tooth at sensor goes 90 degrees before TDC on #1 (all documented in the ms info).

As for the COP details, here's a post from MSEFI (search on my ID timmn for more):

I used coils that are on most 6/8/12cyl late model BMWs from late 2002 on up, such as a 2003 745i. Worldpac carried them last spring, but they seem to be out at the moment.

BMW part number 12131712219, list is about $31 each.

They have a triangular connector. The top terminal is secondary ground, lower left terminal is +12Vin, and the lower right terminal connects to the EDIS coil driver.

You can either use two EDIS modules, or connect two coils in series and use one EDIS module. I'm doing the latter and it has worked great since last spring.

Here's a pic of the coils and the bracked that I fabbed up:

http://www.hbci.com/~tskwiot/2002_files/COPtest3.jpg

installed and on the road:

http://www.hbci.com/~tskwiot/2002_files/COPmotor.jpg

HTH,

Tim Skwiot
Winona, MN
MS2 => 1973 bmw 2002
http://www.hbci.com/~tskwiot/2002.html (needs to be updated!!)
_________________
1973 '02 w/megasquirt-II and COP EDIS ignition

http://www.hbci.com/~tskwiot/2002.html

TimMN wrote:

missing tooth at sensor goes 90 degrees before TDC on #1 (all documented in the ms info).

TIm, thanks i'll have to get a degree wheel and make sure I get that right :) I thought it was 90 degrees, but wasn't totally sure.

In regards to the individual coil per cylinder thing, AWESOME info. thanks Makes sense to me really. Nice fab job on that bracket.

Ciao,

Karel/slash02

Tim, your EDIS setup looks very nice. 2.5 questions:

1a. Do you have dimensions for the pickup sensor bracket you fabricated?

1b. Any other advice in fabricating a similar bracket and/or attaching the 36-1 wheel to the standard M10 pulley?

2. Did the transition to EDIS make a noticeable difference in performance and/or drivability?

Thanks,
Robert

1a. it is pretty simple, just a piece of flat aluminum with a slight bend that attaches to the two water pump bolts. The bend just lines up the sensor with the center of the wheel. It is pretty slight, just a few degrees. Bracket is 1/8" aluminum. There is a pic below which shows it pretty good.

1b. See below.

2. Yep, it runs much better. Much better/smoother performance, but especially at idle, and you can use the ignition map shape to help stabilize the idle speed. Better part throttle cruise - can jack in much more advance to eliminate 'trailer-hitching' and get waaay better highway mileage. I'm getting about 30MPG at 75 MPH now. And much more accurate and stable timing across the board, but especially at high RPM. I haven't done any high RPM performance measurement to quanitify power gains, but it sure feels better.

The COP coils are not required to get these benefits, the ford coilpack will give you all of this. I did the COP thing for the cool factor, and because I want to play with some advanced ignition ideas in the future.

*Wheel fabrication process*

I used a EDIS wheel from an early '90s Ford Escort with the 1.9L SPFI engine. I got the entire front pulley from the junkyard. The toothed wheel is the largest diameter part. I put it in a large vise so it was only supported by the toothed wheel at the top of the vise. Then I tapped the center part a few times with a hammer and it came right off.

I bead blasted the 2002 front pulley to get it good and clean, then made a 'dam' from duct tape around the outside diameter of the big front-most (on the engine) groove.

Fill the area around the middle groove with J.B. weld, let it harden, remove tape:



Chuck it up in your neighbor's lathe and turn it down to the EDIS toothed wheel inner diameter, centered over the middle '02 pulley groove. There's a drawing on the megasquirt site of the EDIS wheel dimensions somewhere. J.B. weld machines like butter, any small machine shop can do this for you if you don't know someone with a lathe. It machines so easy, I'm sure a better MacGyver than I can figure out a way to do it without a lathe.



Wheel and pulley ready for assembly:



And assembled:



I buttered up the mounting area with some more JB weld, and assembled the toothed wheel. Then I added another fillet of JB weld on the 'back' side of the pulley.

And mounted to the engine:



The pulley was painted before assembling it to the car for good. I also added timing marks to the pulley for TDC, since my front cover has a pointer on it still.


HTH,

Tim
_________________
1973 '02 w/megasquirt-II and COP EDIS ignition

http://www.hbci.com/~tskwiot/2002.html