Buy one good coil, place it in each cyl till there is no missfire.

So I just bought some coils, and connectors, including the 6 pin sumimoto connector on the head for the ignition harness, and I bought 5 feet of 16 conductor wire from grainger (200*F rating on temp should be good enough and petroleum resistant). It's going to get wired up for wasted spark for now and when my stuff comes from TSE get switched to sequential.

Picked up a set off a forum member a couple weeks ago. Fabbed a mounting plate at work. Excited about the upgrade!

https://www.miataturbo.net/attachmen...ine=1341351817

It's been a while, but I swear I have read 95% of this thread. Here is the longish question. I have a set of COPs wired for wasted spark. Not going to use them on the turbo car. Went LS coils due to VVT swap. Can my '97 factory motor run these if wired for wasted spark as the original stuff is? Will I need a dwell reducer and where do I buy/find diagrams? I can wire a bit, but circuits are my weakness. I would like to throw them on the '97 since I have the beacket, COPs, wiring and all.

In for more info. Who sells the brackets?

Looks good!

Pretty sure Trackspeed sells a bracket. You can also make your own with aluminum bar stock and some nuts & bolts, all available at HD/Lowe's.

Cut the blank bracket at work and pressed some studs into it to hold the COP's down with a lock nut on top.

Like mentioned above, Trackspeed makes the bracket for $45 I think. Thought I would save the money for my efforts.

I can confirm 100% that this is the 6 pin sumimoto connector. Now to find the Pin out of it.

Had to make my own pinout. 1 is blue 2 is black/ground which is convoluted wiring 3 is brown 4 is empty 5 is brown w/yellow 6 is black w/white. and the pins are numbered when looking into the connector orange facing you with the clip up such that:
123
654

And now I bought the wrong series of connector for the coils, so I ordered the correct ones, a better crimper, a GM iat for the up coming stand alone conversion, and a bunch of good heat shrink. I've also got to break my no soldering/spade connectors on this car promise because I'll have to reduce all the double/quadruple wires to singles to work in the 6 pin ignition harness connector.

I installed cops almost 2 years ago and no issues to speak of whatsoever, well cop related that is. About a year ago I installed a diypnp before going turbo and havn't had a working tach since. Well, the tach moves but not correctly and falls to 0 under hard acceleration. I always figured I jacked something up with the MS but after some time pulling my hair out trying to fix it I told myself if that was my only problem after going full standalone then I came out ahead. (Had never done anything like that, had to teach myself to solder lol) When tuning I have my laptop so TS shows my tach, and driving around I know the engine enough that I can go by sound so it didn't bother me and haven't given it any thought since.

Recently I was thinking about the tach not working and it dawned on me its probably the cops setup itself. I remembered reading about the caps and resistors when I built my setup but determined I didn't need them and the tach worked fine after installing the cops on the stock ecu. I didn't think there was anything wrong with the cop setup when I installed my MS.

I skimmed over the thread again tonight and if I'm understand this the only reason I havn't had a working tach for a year now is because I don't have one effing 1k resistor? :crx: Does this sound like this could be my problem?

Nope.

Well I'm both disappointed that wouldn't fix it and also relieved it wasn't something that simple I overlooked ha ha. Oh well, this is a discussion for a different thread and time. Continue on with miata COPedness

Just a quick bump to thank everyone in this thread. I've been having a misfire issue and couldn't run more than 10psi without the car falling on its face. I got fed up and decided to do something about it. Since i have a 1990 w/ mspnp that doesnt have an ECU tach output, i opted for the COPS over lsx ignition since they have a tach signal.

Anyways built the harness one day after work here, finally got around to wiring these in today. Misfires completely gone, idles better, motor feels smoother, awesome! I was able to turn up the boost as well, and was playing with 13psi tonight and it feels GOOD. Tomorrow i'm going to a dyno day and will get on the rollers to see what it does, might make it by the drag strip as well for some fun.

hoping for over 200whp. anyways just wanted to let everyone know these are worth the effort, i should have done this years ago.

UPDATE from my previous post. Dynod 242whp/230ftlbs. Will make an updated post in the dyno area once i get the email including the dyno sheet.

w00t

Much thanks to your HUGE help with my timing map of course.

ebay cops
 

Have anyone used these cops before?
99 08 Toyota Corolla Celica Ignition Coil Set of 4 New | eBay

Or am I better off buying used original toyota cops?

They are life time warranty to why not. Lol.

Those look like the exact ones I used. IIRC i paid about 75.00 shipped for all 4 brand new. They work amazingly.

Been looking for an answer however so far no luck. What happens to a coil thats ran at 6 volts instead of 12?

These coils need 2-2.5 ms dwell time however the stock ecu pushes 5ms. What happens if you run them in series 2 by 2 for 5ms?