racintang

With the MSD box, all I would have to do is to run the corrolating wires straight to the coils: correct. Pos - Neg

Would I remove the old coil wires since they run to the distributor or would I run them all together?

Rx7carl

I believe that, but will it fire them with enough power to give a row of good sparks under the high pressure of a combustion chamber?

Rx7carl

Modify? I see no reason to do so? What are you wanting? If they are not to your liking, get the spring kit and tune it out to your liking. If you want mech secondaries, just go get a 4150 double pumper.

Rx7carl

The MSD has stand alone wiring for the coil. On an 80 you have a seperate ign module so it should be easy to disconnect the leading trigger from the igniter and use it to trigger the MSD. BTW, MSD has all their instructions online at their website.

Heres another DIY on this

http://www.mazspeed.com/msd.htm

813KR$

I am looking into air bleeds and have realized that my 600 doesnt have adjustable air bleeds. Iam wanting to find out if and how to tap my air bleeds, because I think I need to richen my top end?

I think it is on Paul Yaws web site, about the msd box being able to push many coils at once, he said he talked to the msd tech people? They said something like "Hell yea it would push a row of coils"?

Rx7carl

Ah, Well your carb is a 4160 model right? I'd suggest you get a metering block kit for the secondaries so you can change the fuel jets to do your richening/tuning. Dont start ****** with the bleeds just yet. Your sec "jets" may be the key to your problem. And they arent replaceable on a standard 4160.


Yea, well I dont believe everything I read. And unfortunately I ran out of tires last time out on a track day, and that was one thing we were experimenting with. Only had time to go from MSD in direct fire leading mode to stock. I plan to test all possible setups, but that takes time and a good plan for a test day. Along with good rubber LOL.

racintang

My last question I promise.
I was reading the directions on the mazspeed web site and I just wanted to be sure. I connect the green and purple wire from the MSD box straight to the leading ignitor and replace it back into the distributor.

Rx7carl

No, you dont use the igniter with the MSD. It works better by being triggered off the mag in the dizzy.

Quote:
THIS IS VERY IMPORTANT!!
Hook the GREEN wire on the MSD to the RED wire on the distributor and
Hook the PURPLE wire on the MSD to the GREEN wire on the distributor.

racintang

So remove the ignitor all together

13B4port

i jsut put my MSD and blaster coil on yesterday. read this article. it's how i did it and it works great
http://personal.riverusers.com/~yawpower/ignition.html

V8kilr

Putting an msd box on the secondaries is counter productive, the spark occures more towards the top then the bottom of the rotor, this gives a slight force in the reverse direction the rotor is currently spinning, but because most of air and fuel are towards the bottom of the rotor face the primary spark has more pushing force then the secondary, the secondary spark is only there to help complete the burn of the primary spark obviously for multiple reasons, I'm sure it helps out a bit with emmisions as well.
Disconnect your secondary coil and go dyno, wont notice much difference.

The msd is not where the problem would be, it would be in the coild since they actually store and discharge the actuall spark energy, much like a capacitive discharge system, but because you are running two of them now instead of one you took care of that problem, I'm pretty sure the msd box just helps to keep a solid stronge voltage and lets not forget it throws out multiple spark signals hence the name "msd = multiple spark discharge"


Ran my car well past redline, just ask jeremy from here how fast and far my redline went. I dont think I could get it to stop on redline if I wanted to. The needle would jump so fast once it hit 6k I couldnt stop it before 7k, it would usally hit about 8k before I would shift.

V8kilr

the msd box is now your ignitor

V8kilr

OH YEAH

!!!!!!!! DO NOT MOUNT YOUR MSD COILS IN THE STOCK LOCATIONS OR SIDEWAYS AT ALL !!!!!!!!!!!!!

I got pics if you want to see what happens when you do

813KR$

Let me see some pics, I have always mounted my blasters side ways with out any problems? What happens?

Rx7carl: I already have my metering block. Iam currently running, no choke, 62's in the primaries and 65's in the secs. With a 1'' spacer under the carb.

813KR$

Does any one know, if it is possible to hook up the stock tach to the MSD box? If so, how? What wire goes to the MSD box?

racintang

there is a small plug hole in the side of the MSD box you plug it into

purple82

I've had them sideways for a couple of years. MSD suggests not mounting this way but they don't forbid it. What happened to you?

Sk8r_dude

what do you guys think about the jacobs rotary pack and coils?

813KR$

Racingtang: I know where the wire for the tach goes onto the box, but what wire is supposed to be connected for the stock tach?

Purple82: I have also had my Blasters sideways for years and my brother? wassup with that?

V8kilr

Well nothing too bad, I will have to dig them up and take some pics, the bottom side of the coils are damaged.

Looks like they have been burned and they no longer put out a good spark, the stock coils fire better.

My car runs like **** with the bad msd coils now so I put the stockers back in and it runs fine, until I get some blaster SS coils.

V8kilr

Better then the msd setup but more costly

V8kilr

the stock tach still connects to the neg terminal on your trailing coil.

read my post above this one for second q

813KR$

So if I run a wire from the MSD box to the neg side of my trailing coil, should the tach work alright? Doesnt sound good to me? I currently have the neg on the trailing coil hooked up and have no tach? Dont know why, because the tach worked fine before the direct fire install?

racintang

I'm sorry but I am new to alot of this rotary stuff. I did not pick up alot of the pictures for some reason or another. The dizzy is the distributor correct. I will wire the MSD box directly to the distributor wires, correct. The black boxes in the distributor are the mag pick ups correct. I just don't want to screw this up.

813KR$

Check out the Paul Yaw site it explains everything.

http://personal.riverusers.com/~yawpower/ignition.html