Has anyone "upgraded" thier stock evo8 coils to the stock 1g dsm coil/igniter package? Im having ign missfire problems arond 27psi with a gt35r, and regapping the plugs isn't consistent enough to rely on IMHO.

Any advice someone can give?

 

Ok, I belive this is how im going to wire it up:

stock evo8 coil wiring, each plug has 3 wires: ground, switched 12V, and a signal wire.

Im planning on using the 91-99 DSM power transitor and coil packs.

The power transistor has 7 wires:
12V in connect to one of the white/red 12V switched wires from evo8
Ground connect to one of the black ground wires from evo8 harness
Tach out not connected
coil 1 in connect to black/green singal 1 wire from evo 8
coil 1 out connect to coil a
coil 2 in connect to other black/green signal 2 wire from evo8
coil 2 out connect to coil B

stock DSM coil has 3 wires. power, signal A, Signal B. Can take the power from the other white/red switched 12V power wire for the second stock evo8 coil.

I think this should work fine for wiring, please correct me if Im wrong somewhere.

Im not sure of the software setup though. The dwell maps and settings are completely different between the 1300 DSM EMS and 1313 Evo8 EMS. I would assume the dwell maps from the 1300 box shouldbe used, but Im not sure about the "teeth settings" in the option box, as I think this applies to the cam/crank sensor that is still the stock evo8 parts.

any advise on the software setup? I have looked over some of the CDI installs and they seem similar, but I haven't come accross any info on dwell or any other software changes in the EMS pro software that need to be made.

 

Well, I got the DSM coil and igniter wired up tonight, and the car started up just like normal. I used 1990 year dsm parts, as that's what I had the wiring plug for.



wiring was simple. 2 signal, one ground, one power wire to hook up. I actually merged the 2 ground and 2 power wires from the stock evo8 coils into 1 rather than leave them unhooked.



I have not made permanant brackets to hold the ign parts, finished the wire routing nicely, or tested it under load, but Im just glad it started and ran fine.


I just copied the 2 dwell maps from the 1300 base cal into my evo calibration, but left the 3 option settings as 1313 default.

Will post pics and results ASAP.

 

I'd love to know the results dude

 

That's awesome. I'm glad it ended up working out for ya, especially on the first try. I would think you would want the 1300's options for the coil dwell setting since you are using the same ignitor, coils, etc. from that car, but you could always test the difference.

 

Ok, cool. First wot attempt had some missfires at 25psi. But I had the 3 options for dwell min, max, and dwell teeth set to the evo8 defaults. I changed them over the the dsm defaults, no more missfires at all. The car runs and drives just like normal. I ran as high as 27psi (still on pumpgas, I just backed the timing down a bit) with not a single pop or fart.

the plugs were still gapped at .020, Im going to put in fresh BPR7ES's gapped to .028 and see if it will still run 26-27psi with the large gap. If so, Ill consider this a success.

 

soo this plus the HKS DLI-2 would be the ultimate setup?

 

Hmm...I remember suggesting this...like 3 months ago. Glad to see it works!

DSM coils typically don't need ANY ignition help until WELL beyond 500hp.

 

I made my own Coil On Plug set-up with the same DSM PTU (1993 model 7 pin)and Chrysler 300C coils, Toyota connectors for the coils and an MSD DIS-2 (on stock Evo ECU w/ Dynoflash).
Everything works, only problem I have is I get misses when I'm at light throttle and rpms are above 3000 (the multiple spark feature ends around 3000 rpms, because the capacitor can't charge fast enough). It's in closed loop. I think it could be a dwell issue or a lean condition in this load site. I've experimented with plug types (Denso and NGK) and gap (from .020 to .035).
I currently have them set at .032 (NGKs).
I'm boosting to 25psi (stock turbo) and have water/methanol injection (pushing a 15% water/fuel ratio).
It pulls hard all the way to 8000. It's just this low load above 3000 that causes a miss. (It also throws the P0300 code when it misses for more than 10 seconds).
I know the MSD unit is good ( I switch out an AEM C2DI and it did the same thing).
The coils are good too.
I'm not overly concerned because an AEM EMS is next on my list, but I'd like to figure it out.
Anybody have suggestions.

 

Went to dragstrip tonight to test new ignition:



I conclude that stock evo8 coils suck a nut! I put old 1990 dsm coils and 1990 dsm igniter on the evo8, regapped the plugs wider from .020 to .028, and can nowl run 30psi of boost without missfires. Great how 13year older technology works better. Atleast it was a free mod.

 

I thought i would have mis-firing at high rpm too but to my surprise, I got no miss on stock evo ignition.

I am boosting at 30 to 32psi to redline[(8000 to 8500rpm)-edited] on both my dyno & road tuning with no miss.

After that i put on the HKS Twin power with my splitifire ignition cables & do a couple of runs. I am not surprise that still no misfire but mid to redline pull is much much tigher (butt-feel). Engine sounds vibrant (hehe)...But the throttle really feel much much lighter...

I am on NGK racing plugs heat ranged 9 - edited.

 

Gotta bring this thread back

Anyone know what spark plug wires would work best?

 

There is a thread on coil dwell for evo 8 coil packs. With some proper tweeking you will not need to switch to 1G coil packs. Just a FYI.

https://www.evolutionm.net/forums/ae...eak-spark.html