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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 08-08-2007, 10:42 PM   #421
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Quote:
Originally Posted by Red 90 View Post
I just wanted confirmation if this is better than the stock setup and how much better with regards to spark energy.
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.
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Old 08-09-2007, 12:23 AM   #422
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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.
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Old 08-09-2007, 12:33 AM   #423
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Quote:
Originally Posted by beerslurpy View Post
I'm running the standalone obiwan link. I wouldn't run 18 psi on a link piggy. That is like pulling the pin on a grenade.

What is the story with those GM connectors? Are we still waiting on someone to figure out if they fit? I can't wait to have my car running again. I decided to wait on turning it over until I get the new coils in.

The 1.8 coil system is one giant block of epoxy with no way to disassemble. The plugs are permanently attached. It looks like I'm either going to need a connector of some sort or I'm just going to have to snip into the wires.

Does anyone know where to get a male plug that matches the pattern of the 1.8L coil packs?
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)
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Old 08-09-2007, 01:22 AM   #424
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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.
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Old 08-09-2007, 12:05 PM   #425
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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 [email protected] , 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.
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Old 08-10-2007, 05:13 AM   #426
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Any updates on coils or especially coil connectors?
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Old 08-10-2007, 12:49 PM   #427
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yeah did SOL General pay up or what
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Old 08-10-2007, 02:07 PM   #428
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Yes
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Old 08-10-2007, 03:56 PM   #429
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soooooooper. lets get us some coilz.
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Old 08-11-2007, 01:57 AM   #430
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Quote:
Originally Posted by Ben View Post
For the two people that were interested, if you guys still want to paypal me $40 to build harness for you guys, I will. They will be nicely done, ready to plug in, soldered, heat shrunk, ground wire will have a ring terminal, connections labeled, etc. If you send me your ignitor, I'll open it and solder the leads on to it, like how I did mine. If not, I can solder on some terminal pins.
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
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Old 08-11-2007, 02:47 AM   #431
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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.
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Old 08-11-2007, 03:00 AM   #432
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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.
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Old 08-11-2007, 01:50 PM   #433
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I'm wondering if there's extra wear and tear on teh COP set up running wasted spark?
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Old 08-11-2007, 04:06 PM   #434
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Quote:
Originally Posted by firedog25 View Post
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.
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Old 08-11-2007, 04:21 PM   #435
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Quote:
Originally Posted by lazzer408 View Post
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.
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.
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Old 08-12-2007, 07:12 PM   #436
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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 %).
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Old 08-12-2007, 08:14 PM   #437
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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.
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Old 08-12-2007, 10:30 PM   #438
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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.
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Old 08-12-2007, 11:05 PM   #439
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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.
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Old 08-13-2007, 02:43 AM   #440
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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?

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