MSD 6A Direct Fire Question
 

So i bought my MSD 6A box and I'm going to wire it up as direct fire. My question is how does it work. You have to piggy back the power wires from one coil to another. Does this fire both leading spark plugs at the same time or what. I'm using this link to wire it up. http://www.mazspeed.com/msd.htm

I'm just confused as to how the plugs are going to fire. I don't think they should fire at the same time as the rotors pass the plugs at different times.

Do you also remove the J109 ignitor from the distributor.

HELP.

Yes it fires both plugs at the same time, I believe the timing difference between them is so close that it acts like a "trailing" fire of sorts before the next face comes around, but I had the same notion when I sat down to honestly think about how the MSD Setup works for the 7s.

Yes you remove the leading ignitor.

Yes it'll run fine :D Plus you get to laugh at peoples faces when they see empty spots on the distributor and plug wires going directly from the coils to plugs and you can challenge people that your car will start and or race without a distributor cap and rotor all together.

I cannot vouge for this last part as I have not done it yet but as I've seen to get the maximum value from the MSD you will want to use an FC coil pack.

To remove the J-109 you unscrew the 2 phillips head screws on opposing corners of the
ignitor. Pull it straight back/off, it plugs in that way.

Use a knife/box cutter to cut around the side of the ignitor, to remove the silver plate. When
you pop it off there will be a microchip looking thing and a bunch of ignitor snot. Rip it all out
of there. Literally. You will be left with 4 tabs. Solder the furthermost tabs together with
some wire and solder the 2 inside tabs together.

Rough MSPaint picture:
http://i44.tinypic.com/bhyttj.jpg

Mount the MSD box. The 2 thick wires go to your battery. Big RED to positive, Big BLACK to
negative.

Next are the ORANGE and BLACK pair. The ORANGE goes to the 2nd gen COIL positive
and the BLACK goes to the 2nd gen COIL negative. DO NOT HAVE THE 2nd GEN IGNITOR
HOOKED IN ANY WAY. You can actually take it off the coil like I did.

Next wires are the PURPLE and GREEN wires. These are your signal wires. Not sure which goes
where, but inside the dizzy are GREEN and RED wires. Hook the RED DIZZY wire to the GREEN
MSD wire. Hook the GREEN DIZZY wire to the PURPLE MSD wire.

OPTIONAL: Hook the white wire from the MSD to a switch, and ground the other end. You can
now flick this switch and turn the car over without spark.

the way they have it wired in the mazspeed, the trailing is stock, so the split stays exactly as it was.

what they DID do, is remove the stock ignitor, replace it with the MSD which can fire 2 coils, so you have one coil for each leading plug.

the trailing coil PHYSICALLY moves, but the wiring didn't change

Well I stopped by my buddies shop Forcefed and he gave me a second gen leading coil pack and a set of mazdaspeed plug wires at no charge. Just have to get my locked dizzy back from the father inlaw and were all set.