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