Re: HOW TO: AEM CDI Install (pics)

[trinydex]

http://forums.evolutionm.net/showthread.php?t=116144&highlight=aem+cdi

Here are a few pics of the ignition system I built. It includes a AEM C2DI, 4 MSD Blaster SS Coils, and a set of Taylor 10mm plug wires for a DSM. I had to re-locate the battery in the trunk as I used the Buschur Mini Battery tray to hold the CDI. I went to the hardware store and picked up some miscellaneous hardware and a small sheet of aluminum, to mount a tray to hold the coils above the CDI. I am not currently finished with the fabrication as I would like to put a thicker tray in to hold the Coils and mount it a little higher and more level. I will be sourcing a place locally to make the trays, so it will look a ton better.

Also, the original positive source for the battery is still present and connectected to a 4 gauge wire to the battery in the trunk. This will be changed to have power distribution block mounted out of the way like the one for the ground wires.

http://www.socalevo.net/gallery/albums/userpics/10991/normal_mURI_temp_9801900a.jpg

http://www.socalevo.net/gallery/albums/userpics/10991/normal_mURI_temp_971e5226.jpg

http://www.socalevo.net/gallery/albums/userpics/10991/normal_mURI_temp_963ff9c1.jpg


Here's a diagram for installing it with the AEM c2di and in wasted spark mode. Pay no attention to the ignitor, run the c2di directly to the ecu.

http://www.socalevo.net/gallery/albums/userpics/10991/normal_evoaemc2dihookup1dd.jpg


This is a blast from the past. The wiring diagram is in post #31 above. I have since switched to a M&W Pro 14 ignition box, as the original AEM C2di's had issues on one of our race cars and I didn't want to wire in a dsm ignitor, 2 ignitors in my case as I am running a true sequential ignition setup with no wasted spark.

[trinydex]

http://forums.evolutionm.net/showthread.php?t=205435&highlight=coil




I made a quick diagram to help people figure out how to setup a COP setup. This is a very cheap and very effective way to fix any ignition problems you have. Hope this helps, Im tired too so it should be correct but if someone finds something wrong with it let me know and Ill fix it. I do not have the actual ignitor or harness with me so I am going off the colors that I found on the net... they may not be accurate but should be.

http://www.socalevo.net/gallery/albums/userpics/10991/normal_evo-cop.jpg



And if you want to simply use just the DSM ignitor and coils you can skip all the wiring going to the coils, just leave the DSM wiring from the ignitor to the coils and it will work fine (You will need the 4 spark plug wires as well). That would be the cheap way to fix any ignition problems (Junkyard out the DSM stuff for $20).

Both of these ignitions are proven to hold at least 35psi w/ a 150 shot of nitrous with no other ignition amplifier. For a $20 ignition you cant complain :)


If you are going to use the DSM Coilpack these are the wires coming out of it:

Black with white stripe = Power (12v switched)
Red = Coil pack 1 trigger wire
White = Coil pack 2 trigger wire

Of course if the harness is still together the ignitor will already be plugged into the coils and you wont need to worry about them. If that is the case you will just use 4 wires from the ignitor:

power, ground, coil 1 in, coil 2 in and splice them to the stock Evo harness


I just installed the DSM Coils and ignitor in mine. Everything went pretty straight forward. The ignitor on the DSM is labeled also so there shouldnt be any confusion on which wire goes where. I didnt have the actual harness so I just soldered all the wires in thier spot and then filled the rest of the connector space with hot glue. Worked perfectly, I can't wait to see what my car does with decent ignition!


You won't be dissapointed, Just be sure to use the right dwell settings as below. You will notice that the stock AEM startup cals have incorrect values on them from what I could tell.

Coil Dwell Factor 30
Dwell Max 1.00 teeth
Dwell Min 0.10 teeth

I run NGKBPRES plugs without changing the gap so (.026 or .028) with no misfire issues any longer.


Not exactly like the DSM ones were made with performance in mind either :)

The Chysler coils are what most of the COP setups use.

Now to support your idea though, I could not get the Chrysler coils to work very well. The DSM coils went in fine and worked well on pump gas (Never got race gas to test how good they are before I switched to the COP setup). For some reason the COP way is making a very strange thing happen... its almost like it hits a rev limiter of some sort when I hit around 5.5k and 20psi... the car just quits accelerating, hold the RPM almost constant and the boost doesnt go any higher... Very very strange. I will take it back off and double check all my wiring. I also didnt make a plate to hold the COP so the coils just kinda rest on each plug. Ill make some way to hold them on better and try them again.

Does anyone have experience with these coils without an ignition amp? The DSM way seemed to just work perfectly but these ones arent... I am hoping its just some wiring mishap because they look much cooler than the stock DSM coils :)


The coils not being bolted down may have a problem with it definately.. they just kinda sit ontop of the plugs.

Are the settings you gave earlier for the DSM coils or the Chysler coils? I ran the car with the DSM coils and used the stock DSM settings as well as the Evo settings with no problems. The Chrysler coils I tried the Stock Evo settings, stock DSM settings (Just for the kick of it) and the Dodge Viper settings. None of which helped anything.

And no, I have not tested the connections at all. I just wanted to test out to make sure everything worked (Hence the reason for no plate to bolt them down). I was also probably drunk so I may not have done the best job. Im gonna re-check everything and do it again and see if I can use the stock coil cover to hold all the coils down for now. The car is now sitting at my new house that I am moving to which I wont be there for another week or so though... Ill find out then :) Id like to get the ignition done so I can work on fixing my boost spike so I can run the car and make one decent pass for once at decent boost. Im planning on doing that on the 9th. Too many things going on at the same time :)