I've been digging deeper into the coil dwell time and I think I understand what you referred to as Mitsubishi's engineer's design and the problem with what I was planning.
The dwell timing will be off 180 degrees and will cause issues of either discharging while coil is charging up, or coil is charged up and held longer before discharging (which is more wear on coils and can cause coils to fail). Thanks for the warning.

 

I think your over thinking it. The most I have seen anyone modify the stock circuit is to just add a larger fuse. If you wanted to run your own Power wires then you would also need to add a relay, a fuse, and something to trigger it off of, probably the old power wires of the ignition circuit, or if you wanted to get crafty you could wire up some anti-theft. You shouldn't need to do any of this, unless your wires are corroded or harness damaged.

 

From what I've read, if I run power directly, it will fry the coils because it holds the capacity too long and once it overheats enough, coil burns up and we'll get lots of smoke.
I agree to keep it simple since that's been working.

 

I think your thinking of older technology systems that used an ignition module to drive one big *** coil, which would then feed through a distributor to the individual plugs. If you just hooked that coil straight up to power it would overheat and die. The modern systems have basically shrunk down the coil and the ignition module into the package we have now. So what we are calling coils are really much more then that. and they receive a constant current supply to operate.

 

Just realized I read schematic wrong (sorry if I confused anyone with my earlier post). 12V and ground are hooked up continuous. You're right Biggiesacks
So this means I can spread the load on the two COPs. Hmmm
I need to understand how dwell time is controlled on the coil and the physics of how spark is made.

 

UPDATE!: I just watch a video that explains the evo's oem set up and it makes complete sense! Both spark plugs do fire! One spark plug fires from the center electrode to the ground electrode. The energy travels throught the head and fires the spark backwards from the ground electode to the center electrode!! And closes the loop. That just blew my mind!!

Spark goes to cylinder #4 spark plug, travels through head to cylinder #1 spark plug, spark backwards to center electrode, through spark plug wire back to coil!



Erased old discussion to prevent confusion.

 

dwell time is a function of the pulse width of the signal from the ECU.

 

Yes!!! Turns out, when signal from ecu is on, coil is charging up (dwell time). The spark doesn't occur until the signal turns off. My mind is definitely blown away!

Now I'm trying to find the spark circuit. Where does the spark go after it discharges into head?

It looks like spark goes through ecu
Something is wrong with this COP since it only has 2 wires. I'll search and update...

 

The ECU pulls current through the primary and when the primary is fully charged the ecu shuts off the current and the collapsing field induces the voltage spike on the secondary which fires the spark plugs. The dwell time is the time it takes for the field of the primary to build up.

 

Yah thats the OEM system, but with the COP setup its just the one coil per plug.

 

With the COP, spark discharges into head. How does this get back to the secondary coil to close the loop?

 

The secondary is also attached to ground.

 

Thanks. I'll put mine together after rewiring my fuel pump. Has anyone tried cutting the boot to fit the plug over the stock valve cover lip like how the oem boots fit?

 

Do you know exactly where the OEM ground from both connectors are bolted to on our evo? Is it near our ecu?

I'm looking for actual locations on car of red circles:

 

you can see from the diagram you posted that both primary coils ground to "body point 4 and 11"