We shall see when test results come back.

Who did your tune? Are you using the basecal's timing map or did you make one yourself? I'd like to get a copy of your workmap if you don't mind to compair. I'll send you mine. Which reminds me I have to send TurboTim a copy too.

Lazzer408,

I did my own tune using the boostcomp. The basemap for fuel, I found it to not give me good idle resolution with larger injectors. The timing map is sort of a hybrid of taking the FM timing numbers, haltech from a friend of mine and tuning myself. It's an ongoing tune, but no problem I'll send you my tune.

Since I just got home I'm looking at the dwell settings on the stock miata coils, I can't seem to find the toyota ones for the corolla. Mine doesn't seem to have the selection in the wizard. Can you tell if AEM had a difference in the dwell settings. AEM may have done some homework on it. Might be good to know what their stock settings are.

I think i'm gonna cut the wires behind the OEM plug and use some of these weather pack connectors or something similar for a COP PNP harness. That way I can go back to stock if I had to.(god knows why)

Lazzer408,

I updated the wizard and can see the settings. The miata coil dwell settings are quite different from the Scion/tc/ta/echo ones.

http://www.imagestation.com/3842788/3895573541

These are the AEM Miata Settings

http://www.imagestation.com/3842788/3895573524

These are the Scion/tc/ta/echo settings

Sorry, I don't quite know how to attach pictures.

From what I can see, at 14v the miata dwell time is:

100x0.50x35= 1750 microseconds or 1.75 milliseconds

The scion/tc/ta/echo dwell time at 14v is:

195x0.23x30=1345 microseconds or 1.34 milliseconds

I'm not an expert but are these calculations correct? If it is, it means that the stock 1.6L miata dwell time is longer than what's needed for the corolla coils. Granted it doesn't look like it's by a large margin at 14V. However the voltage to dwell time curve is much different as well.

You have to also take this wizard with a grain of salt in that the AEM guys came up with these. I'm not so sure where they got their numbers or how they tested.

Okay, how about this, this forum isn't so densely populated and abused that I can't do this.

Send me images and I'll host them on my image server. I have the bandwidth, in fact my monthly quota barely hits 1% any given month.

mail to firedog25@yahoo.com , I'll host them and send you the link to put into the img tags. If you don't know how to use img tags I'll format them so you can copy and paste.


In the subject of your email put Host for Miataturbo so I don't just delete it as spam.

Any updates on coils or especially coil connectors?

yeah did SOL General pay up or what

Yes

soooooooper. lets get us some coilz.

Ben, I'd be interested in one of these. I can't PM you (10 posts required). Please PM me if I can get you to make one for me. Where do I send an ignitor and what address for PayPal? Thanks, JRM

Sorry for the delay getting back. I'll have the whole batch of 24 ordered by monday. Hopefully tomorrow if my supplier is open.

Red90: If the dwell is .41ms longer then Toyota specs I don't see this being an issue. I played with the dwell settings for awhile just seeing if I could notice any difference in power. Without a dyno it makes it hard but I couldn't tell anything untill I got low enough that it was misfiring under boost. That was very low. I believe in the 50s with AEMs dwell vs. rpm. It's a confusing method they used. As tested the coils seem to have a built in current limit of 10amps. This is a great help to keeping them cool.

Also there's a few stock ecu Miatas running them with no problems. There's actual improvement with those cars just running smoother.

I'd be interested in a harness too if you can do one for a pair of 97 ignition harnesses. I can ship you a coil pack if you need a reference to be sure it fits.

Unless someone knows where I can get a connector I can plug into the factory mazda harness and where I can get a working connector for the coils. I can crimp wires and all that other stuff to connect them.

I'm wondering if there's extra wear and tear on teh COP set up running wasted spark?

There's no mechanical parts to wear. It's electronic.

My coil dwell calc's are wrong. I logged the dwell and it doesn't match my calculations. In logging my dwell time, it shows 3.5ms and going down after about 4400rpm. You should probably log the dwell times with your Toyota setting to see what they are. Compare that to what Jason has shown for optimal dwell times.

Your right there are a few people running this right now with stock ecu. I'd still be wary as the stock ECU's dwell times are different. I can't confirm... but I believe the 1.6L ecu sends a dwell time of 5ms and I believe the 1.8L NA coils is less. Given that the optimal dwell times for the toyota coil is around 2.1ms.

One weird thinga bout the AEM dwell curves, is that a "coil dwell factor" of 50 results in a dwell time, in mS, of % divided by 10.

So a dwell factor of 50 and 35%, yields 3.5 mS.

If your dwell needs to be between 1 mS and 10 mS, a dwell factor of 50 is convenient. ('%' will be between 10 and 100 %).

Hey, did we ever settle on what connectors fit best with the plugs? I want to start making a harness so that I am ready to go when they get here.

I'm gonna have to double check the wiring on my COP setup. I'm getting a very short stumble(like a misfire) once and a while. Not a big problem, but possibly a concern.

Yeah, Lazzer found them. Look a page or so back, he lists the part number. They are very expensive though--appx $25 PER coil for the plug and pins.

I am going to solder wires directly to the COPS like Joe Perez did.

How about on the miata end of the wire harness? Unlike the 1.6L guys, my coils don't have any wires on the coil side of the harness. The plug goes directly into the coilpack.

See? Anyone know what I could get to plug in there?

http://i11.tinypic.com/5y8jm2d.jpg

beerslurpy: Since this is a conversion just cut the miata harness. Leave 4" on the Miata's coil plugs just incase you ever want to go back. Just to note. If you follow the wires from the Miata's coil plug back into the harness a few inches you'll find they all connect together except for the triggers. In other words there's only 5 wires you'll need from the Miata. If you want, open the harness and find where they tie together. You can tap the 5 wires (cut insulation, twist, solder, tape) and leave the oem connectors there.

rut roh. Where you been Sean? I tried calling you a few times. What are the plugs looking like?

Dunno if it's already been asked, but do the Toyota coils seal the tunnel like a set of plug wires do? You know, to keep water and random junk out?

To some extent. The rubber seal does contact the valve cover but is not molded to fit as well as it might fit the 1ZZFE. I personally don't let water and random junk get on my motor. :gay:

I knew whatever response I got would have that sort of disclaimer in it... :inout:

Thanks for the prompt response!

Red90:
I don't see the dwell being a huge issue. I goofed with it quite a bit and it seems to either ignite the mix or not. I couldn't feel any change in performance when I cranked up the dwell. There is a science to it and I won't argue a long hot spark is good for power. What we need is the guy who tested them, Jason?, to run them for a few hours with excessive dwell at excessive RPM and see how hot they get. Or even run it till it blows out to test the limits. (I'll send him one of TurboTims for that testing....j/k). He noted the current limit was 10a which is more then enough to warm up those little coils IF the dwell was excessively long. So how about it Jason? You want to abuse some coils for awhile?

[QUOTE=kotomile;139736]I knew whatever response I got would have that sort of disclaimer in it... :inout:QUOTE]

Ah you know us well. :bigtu:

I should tell you that I had recently painted my valve cover after welding on the stand-offs for bolting the COPs down. When I removed them there was a full circle from where the COP seal was in full contect with the valve cover. I guess I could have let it dry a bit longer.

that's good news. I think I might try this.

lazzer, back on one of the early pages (I just read 1-7 all at once. Yes, I'm bored.) you say "tie the power wires together" and "tie the grounds together". I assume you're saying the COPs share a common ground and common power wire?

Uh right now I only have 6 wires at the connectors. I think my year lacks the RPM signal.

I realize that, but electronics are subject to wear and tear as well. That's why computer components go bad over time.

Also, any MS guys running this yet? I plan on going MS and if sequntial fire can be achieved that would be neat.

I would liked to have tackled this project already, but have had other delays.

Once my MS is fully tuned to my liking, I will be running these on sequential fire.

In less then 2 weeks hopefully.

Yes.

This explanation is by far the easiest IMHO. Makes it sound easy.

So when am I going to get my coils? Tracking number would be fantastic too. :)

Seconded on the tracking numbers.

Oh and for 97 it looks like there is no tach line so you end up with:

3 wires per coil on the COP side.
-1 each of trigger, power and ground per plug

4 wires on the miata harness side
-2x trigger, one from each factory ign harness
-1x +12v
-1x ground

I have the GM parts on the way and I have the aluminum for the bracket to hold the COPs in place. When the coils get here, I am going to drill it, find some appropriate sized bolts and some spacers.

I haven't even got my tracking number yet but the order was placed. Everybody's coils will go out the same day so I'll post all the tracking numbers here. Or is that a bad idea because the addresses might be shown.

Better PM the tracking number IMO.

Not that I care if you guys drop by :gay:

UPS only lists the city it is going to. They won't be able to find out where anyone lives. Otherwise thieves could just troll the tracking system looking for packages taht are being dropped locally to steal them.

Lazzer you got my PM about the address change?

I work at ups, Ill make sure *I* get all the coils haha.

SOL yes I did.

Everyone else I'm using your Paypal addresses right?

Yes.

sure

I must have gotten a different coilset. On mine, there's about 3/8" space betwixt coil and valve cover when fully seated. On a 1.6 engine.

Post a pic of your coils, the part numbers, and the instalation. Sean has a 1.6 and the coils I recomended and ordered fit fine on both the 1.6 and 1.8.

biggest DIY thread ever

Yes.

it said in my paypal to use my paypal address. "yes"

Joining this discussion. Great idea here. I tried the Chrysler/AEM TwinFire amplifier COP system once. Worked okay until the AEM box fried itself. Took it off and run OEM coils again. This COP idea seems to be much less maintenance and in keeping with the KISS theory.

Only thing is I don't want to cut into the factory ignition harness again after the last debacle. I noticed an image of a connector on a previous page. That looks like it may fit the OEM coil connectors going to the 1.8l coils on my engine. I'd really like to find a connector that I could PnP with so I don't have to cut the 1.8l ignition harness again.

I already bought a set of 1ZZ coils off ebay. Just want to find a connector for the OEM ignition coil connectors before jumping on this project.

Just finished my PnP harness for mine. Still wish I had the toyta cop connectors... but i made do.

http://www.imagestation.com/picture/...e/e81823f7.jpg
http://www.imagestation.com/picture/...7/e81823ef.jpg
http://www.imagestation.com/picture/...d/e81823e4.jpg

I'll test it all out, once I figure how I want to mount it.

Looks good. To bad I can't just disassemble an ignitor to do that for my '99.

Hey-what a good idea :D

hey-I mentioned it weeks ago...

Looks good Splitime. You welding on stand-offs now?

How did you make the bit that plugs into the miata ecu harness? Also, how come yours is only one plug instead of a pair of plugs?

It looks like a gutted ignitor with the wires coing out of teh back from a hole.

Looks like it will be neat.

Congrats.:bigtu:

Incredibly clean - very nice job!

Jeff

Now if only it worked 100% :p. I got car up on them first try, idle smooth, didn't test beyond that.

But... no tach. I have all 4 tach outputs merging and then merged with the 2 center wires on the ignitor....

I"m so close.

I'm trying to come up with a less permanent way. My GTX valve cover is in good condition... and I don't really want to refinish it.

Will the plugs not just sit on the spark plugs? Or do they not clip onto the plug like most plug wires do?

no they'll come off when you're driving. they fit on the plugs, but not as snugly as plug wires do.

dave, I find your tach issue odd. I'm planning on isolating all the tach outs from each other with diodes. perhaps that's an issue.