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Installing an Aftermarket Ignition System

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Old 04-08-2006, 05:07 AM
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Installing an Aftermarket Ignition System

What You Will Need
- Soldering Iron (pencil-type)
- Fine Point Solder
- Wire Strippers
- Heatshrink Tubing (buy a multipack, or size 1.5x the wire diameter)
- 10mm Socket, Ratchet, and 3" or 6" Extension

MSD-6AL Ignition Box Installation
The next order of business is to remove the battery's negative cable as to prevent any suprises while playing with open wires and soldering irons. It's easiest to just remove the battery altogether as it's in the way and you could still accidently have the negative cable come in contact with the battery, thus providing current for the car.

Now, our primary concern is the stock ignition coil. There are three wires leading into the coil itself, two thin blue wires and one heavy black/yellow wire. In the picture below you can see a clear pic of this area. The black/yellow wire is on one plug to the ignition coil along with one thin blue wire and that the other blue wire is on a seperate plug of its own. This heavy black/yellow wire is actually the positive cable for the ignition coil. Our other single blue wire on the other plug is the negative for your stock coil. This leaves us with one other blue wire that's attached to the positive wires plug, and it just so happens to be the Tachometer signal pickup which will soon be attached with the other blue negative wire from the coil.

We recomend cutting these three wires as close to the plug as possible as to provide ample amount of room to work with for the new setup. NOTE: Once cut, there's no turning back. If you think you might want to go back to stock, leave enough slack to splice the two wires (the stock wire and the one in the plug) back together. After your three wires are cut, you need to pull out the 10mm socket and remove the stock ignition coil mounting bolts so that you can free up that space under the hood; remove the ignition coil. Now pull out your wire strippers and strip off about 1/2 of an inch of shielding from each of those three wires; two blue and one black/yellow. Remember, the black/yellow wire is positive and the two blue wires will now be your negative's (one blue is the RPM pickup lead). Mount your new ignition coil in an upright position and you are done with the coil install.

The fun part comes when you get to actually pull the MSD 6AL Box out and set it in the engine bay itself (see below). Keep in mind that the wiring will depend on where you decide to mount your ignition box. Some have mounted their box behind the intake manifold on the firewall, some even in the glovebox inside. I chose to mount mine in a special location though that most would/should not attempt; the stock fuse box area. Wherever you decide to, make sure that you wire the box up in relationship to the items you must connect with for wire length purposes. Location being the subject, you also need to find a place for the ignition coil mounting. Do remember that MSD (and common sense) tells you that this coil should be mounted in an up-right position.

Now that you have the box and coil placed where you want them and mounted, it's time to start soldering and heat shrinking connections. Fortunatly, the wiring is a walk in the park for this install. Your MSD 6AL box has six lengthy wires coming off from it. There should be one orange and one black wire bundled together, a white and red wire, and then your positive and negative (red and black) wires with O-ring type ends on them for your battery mounting. The black and orange wires are perhaps the easiest to install and hook up, so let us start with them. The black will go to the negative side of the new ignition coil, and the orange to the positive (see below). Do remember to take off whatever amount of wire your not going to use from this point onward. For this application, I chose to hack off the provided "spade" connection ends and go with my own O-ring ends so that I can just slide them over the positive and negative posts of the new ignition coil. No matter what you do here, use heatshrink tubing or electrical tape over the spliced connections to keep these free of open wires. Any open lead can cause serious malfunctions in the electrical system if another piece of metal was to ground out with it. Finally, refer back to the three wires that we discussed earlier. Your yellow/black wire will now need to be soldered to the Red wire leading into the box, and the two blue wires need to be soldered in place with the leading white wire that also comes from the box. This will provide the impulse and tachometer signals to your new MSD box.

Everything is about done at this point and you are about ready to fire the car up for it's initial start. Make sure that you do a few things first, however, before connecting the final positive and negative connections to the battery. First, on the side of your MSD 6AL box there's a small black plug that's screwed in place. This is the RPM module. You'll have to remove it and cut the two wires that are looped together; blue and red. These are used for the box to recognize your engines size in cyl. numbers. With those two red and blue wires connected, the box thinks that you have a V8, cutting just the red wire makes it think you have a 6 cyl and finally the blue and red being cut makes it recognize just 4 Cyl's. Once both of these are cut and the plug is once again installed, you should be one step away from reconnecting your battery. The MSD 6AL features a "Soft Touch Rev Limiter" and works off of your desired RPM ignition cut. The 6AL set comes with a 3000, 6000, 7000, and 8000 RPM modules for the side of your box. I chose to use the 6000 RPM one so that I could keep myself from touching that majic "redline" number on the tach. You can almost see my 6000 RPM module on the side of my box in the picture below. Last but not least, you need to provide the box with power. Your O terminal ends on the boxes final wires, red and black, slide easily over the bolts lined up through the battery posts, so place them there and bolt your battery down. Sit back, relax, and get ready for the startup of your new ignition system.
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