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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 03-03-2008, 12:03 AM   #1021
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^ yea its a Megasquirt thing. Here my finished product.

Simple, and it works.
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Old 03-03-2008, 12:03 AM   #1022
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Quote:
Originally Posted by Saml01 View Post
Oh and the dwell settings def play a big role in the warmth of the coils. running 4.0 vs 2.5 was a big difference to the touch, ON A HOT ENGINE.
You wouldn't be able to feel it unless you ran the dwell at 5ms at 7000rpm for 15 minutes and then [email protected] for another 15 minutes. Tooling around town ~3500rpm doesn't count.

Does anyone have a square wave generator with pwm control so they can run those coils at "7000rpm" (30hz wasted/15hz sequential) for awhile and see if 5ms pulse actually makes it too hot? Then compair it to 2.5ms.
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Old 03-03-2008, 01:37 AM   #1023
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Quote:
Originally Posted by lazzer408 View Post
You wouldn't be able to feel it unless you ran the dwell at 5ms at 7000rpm for 15 minutes and then [email protected] for another 15 minutes. Tooling around town ~3500rpm doesn't count.

Does anyone have a square wave generator with pwm control so they can run those coils at "7000rpm" (30hz wasted/15hz sequential) for awhile and see if 5ms pulse actually makes it too hot? Then compair it to 2.5ms.
Anyone who has a MS can do it - at least in MS-II you can run the outputs however you want. Also good for flow testing injectors: Ask for 100 pulses of 3 ms each at 100 ms intervals or whatever. I ran my coils out of the engine at ~7000 rpm and it was impressive, just a constantly buzzing blue light.

Also, 30 hz * 60 sec/min = 1800 rpm.
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Old 03-03-2008, 01:54 AM   #1024
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I did:
7000rpm /2(fourstroke) /2 (batch fire) = 1750min/60 = 29.1hz

EDIT - ok I goofed. It fires once per rev. so 7000/60 = 116hz or 58hz in sequential.

Last edited by lazzer408; 03-03-2008 at 02:06 AM.
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Old 03-03-2008, 11:10 AM   #1025
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So yeaaaa. Those who installed cops, did you have to change your cranking PW's or am I the only one?

Arkmage showed me his, he has a similar setup to mine and they are really really low compared to what I was using with the factory coil.
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Old 03-03-2008, 12:24 PM   #1026
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Quote:
Originally Posted by Saml01 View Post
So yeaaaa. Those who installed cops, did you have to change your cranking PW's or am I the only one?

Arkmage showed me his, he has a similar setup to mine and they are really really low compared to what I was using with the factory coil.
Is your "start PW" measured in ms? If so set it to 2.5ms or whatever your dwell is.
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Old 03-03-2008, 12:39 PM   #1027
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actually, if sam is indeed referring to ignition and not injection pw, you'd want your cranking dwell to be longer than your running dwell because voltage is much lower.
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Old 03-03-2008, 03:12 PM   #1028
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Quote:
Originally Posted by Ben View Post
actually, if sam is indeed referring to ignition and not injection pw, you'd want your cranking dwell to be longer than your running dwell because voltage is much lower.
Injection PW, Im sorry. I should have been much clearer.
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Old 03-03-2008, 03:31 PM   #1029
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I've read through this thread from start to finish twice now. I've been down to my car and think I understand the wiring and what's involved. I think I know what to buy and where to buy it and what cars to look at in junkyards... but:

Can someone (LAZZER, BRAIN, SAM, BEN, etc...) who has been a major contributor to this thread please create a detailed "STICKY" with about 5 posts that takes people STEP-BY-STEP through this thing.

It should include part numbers for all the connectors, where to buy, a list of compatible OEM COP's, a detailed drawing of how EXACTLY to wire the thing up. Where to cut and exactly the lengths to cut everything. Real pics (w/appropriate markers labeled by MS Paint) would be awesome. Exactly what things to change in the various ECU's people will run with them... REALLY dumb it down in a clear and consolidated thread.

This thread is awesome, but it's going on 1100posts now and somebody could do an invaluable service to the community by composing an idiot-proof 1-stop shopping for the rest of us.

Yes, I know there has been a mild amount of pain and "why don't you sack up and do it yourself" and I understand that. But please, somebody have mercy on the Arts majors on the forum and make it easy for us. I mean really easy. I'd do it for you if I was the first to try something (my new seat doesn't count).

I'll be going to the junkyard this weekend to bag me some COP's, so if you could have the writeup done by then, that would be great. And I'm gonna need you to come in on Saturday to fix those TPS reports. OK, great.
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Old 03-03-2008, 03:45 PM   #1030
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Scott did that long ago. It's in the archives.
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Old 03-03-2008, 03:47 PM   #1031
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Old 03-03-2008, 03:53 PM   #1032
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I feel so dumb I'm not going to even edit my request above.

I searched and didn't find that thing. I did a title search for COP and read them all and I never found that thread....

AHA, upon further investigaion, I am vindicated. He actually spelled out "Coil on Plug" in the title of that thread. Well, that will teach him... make me show my *** and ask for help and it was there all the time... stupid Braineak...
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Old 03-03-2008, 03:58 PM   #1033
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Is the diagram for the 1.6 correct? I know there has been some discussion that Lazzer's original drawing had the triggers wrong.
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Old 03-03-2008, 04:21 PM   #1034
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This is what I think, based on 0 evidence
If you're going to cut the connector off the car's harness, then follow the diagram. If you're going to hollow out an ignitor and use that for the plug, then reverse the triggers.
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Old 03-03-2008, 04:36 PM   #1035
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I'm using an old ignitor. I'll use the factory wiring diagram to make sure I get it right.
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Old 03-03-2008, 05:13 PM   #1036
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Quote:
Originally Posted by Ben View Post
This is what I think, based on 0 evidence
If you're going to cut the connector off the car's harness, then follow the diagram. If you're going to hollow out an ignitor and use that for the plug, then reverse the triggers.
I think you're dyslexic or something....i installed cops with both methods, same diagram. no issues.
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Old 03-03-2008, 05:58 PM   #1037
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I've done several of em, same result
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Old 03-03-2008, 09:34 PM   #1038
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I hope im the only unlucky one here. To get my **** started just now I had to roll back all my cranking PW's - 3.5 @ 40 and 3.3 @ 60, cut down my ASE - starts at 40 works its way down by 5 and reduce its total time to 5 seconds, and increase my warmup.

Some weird **** is going on with these. They require less fuel to start the engine, then more to keep it running during warmup. But once its warm they are golden.

I am gonna try another cold start tomorrow night and let you guys know the results. Im still lost why something with a more powerful spark needs less fuel to get going, considering most of you, from what I understand, are swapping them in with no modifactions to anything fuel related.
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Old 03-05-2008, 08:49 AM   #1039
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Little update on my 1,6 NB COP conversion:

In post Nr. 712
https://www.miataturbo.net/forum/showpost.php?p=170441&postcount=712
in this thread I described my way of doing the harness and special harness connector on the 1,6 NB (special because I suppose the 1,8 hasn't got this connector) - and that I got no spark.

Well, after a while of lost confidence and I made a last try. I soldered a big ground wire to the harness ground wires, plugged all in - and it runs. (Maybe I should have listened to Ben who told me several times to try a good separate ground... )
Another possibility is - I just unplugged my EMB and had just the OEM ECU plugged in. Has anyone running the COP with EMB or (more important now for me) EMU? Is it possible, that the EMB or EMU is changing the trigger too much?

Just one more question according the mounting bracket for the coils. If I just plug the coils in - they sit flush with the cam cover. If I make a mounting plate (Braineack style) the coils will be sitting about 0.3 inch higher - do they still reach to the contact of the plugs?


It looks like it would be possible to turn Nr. 1 and 3 about 180 degrees and bolt Nr. 1 and 4 to the original cam cover bolts and make a small bracket for Nr. 2&3. Anyone tried this?


Thanks!
It's running!
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Old 03-05-2008, 03:18 PM   #1040
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Did you have to do anything to your cranking pw's?
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