Jason, thanks for the information.

I'm currently running COPs on my stock 99 ECU with no issues. I definitely want to do this mod though.

Braineak, I'd be interested in the circuit board if they are being printed (although I'd be even more interested in buying a built product).

Jason

The wiring is an issue. You should connect the COP power and gnd as I described earlier.

Hi Jason,

could you eventually do a little scheme, which wire off the wiring goes where on youre device? (It's because I am a electronical noob - it's like reading chinese for me) Thanks again!

Greets

Jason, I understand you're using an AEM; for those of us with AEMs, is this a mod we should consider doing too?

Thanks

Rafa

If this solves my dwell issue Jason, I may just have to send you a little something something.

Ground of the circuit should be connected to ECU ground, or the ground provided for the factory coilpacks. 12v can be any 12V switched. It won't care.

Do you mean using the Toy COPs? Yes, for high boost.
If you mean the power and gnd wiring for the COPs if you are using the AEM ... that's a yes too.

Hookers and blow? :D

Largest caps I could pick up at Frys was 1000mfd. They're 16V 105C electrolytic. There were 4 on the shelf, so I got all 4; 1 to go across each COP. Best I could do in a pinch.

^ ebay has 10000 but they are not the type you can lay down, and are audio grade. Like 8 bucks. Largest I could find in radioshack were 4700.

LOL Digikey has 10,000 uF / 16V Nichicon HE series for <$2 each:

http://search.digikey.com/scripts/Dk...me=493-1546-ND

LOL plus 5 dollar handling charge and shipping ;)

I bet I could pull one out of an old computer powersupply.

Yeah dammit, $5 shipping.
I think I'll get several and see if people want them at $3 to offset. Everybody wins.

I went and picked up two Nichicon 4700uf at radioshack for 10 bucks, I think they will do.

Well damn,

Thanks for putting all the time into this Jason and posting the schematic.

I'm one of the guys having issues with the COPs and EManage Blue. I know you were able to get COPs running on Bob's EMB equipped '99 so I'm not worried about a circuit working with my '91.

So, basically, I need to find out what the stock dwell is set at for my '91? Assuming I can do that, what changes would I have to make to the circuit for it to run properly with my '91?

Holy shit, why did i just read every post and still have no idea WTF is going on...and i just finished my COP harness.
Hate to sound like Sam, j/k, but seriously, can someone explain this to me in a ESL (English as a Second Language) type of ordeal.
I am running MS standalone on a 94, and my COP harness is a direct PnP into factory harness. Where would i insert this capacitor? Do i need one for each coil, or pair them up, or each on his own? Sorry, but i really do not get this shit, should have stayed on school, i know.
Thanks

If you had a 10000MFD cap you'd install it between the +12V and gnd that runs behind the head to the coils, before each splits to 2 leads. If you had a pair of 4700MFD caps you'd install it one at each paired harness.

Ben, i could do either, i got pretty good with the soldering gun, lol.
I think I may get in on your GB thing and just do the one before it splits. I just was not 100% sure I understand all this. I think i got it now. Thanks!

My miata is a '96 with an AEM F/IC (piggyback). I've got my COP's, not installed yet. After reading this thread it seems as though it would be a good idea to make one of these doo-dads before taking the plunge.

Unfortunatly, im no electrician and don't know what to make of the schematics. Any pointers?

Ignore the schematics, read what Ben said to me, we are pretty much in the same boat when it comes to your question
either buy the 10000MFD or buy two 4700's...that will determine where you will solder this in
I bought the 10000MFD and will put it in the main harness before it splits