COP Coils, which coils? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 05-11-2010, 10:28 PM   #1
Junior Member
Thread Starter
iTrader: (4)
 
Join Date: Jan 2008
Location: Chicago
Posts: 88
Total Cats: 0
Default COP Coils, which coils?

I have been given a set on Ford 4M5G-12A366-BC coils, it looks like they are from a Ford Focus and some Volvo models. They have 2 wire connections, I will post some pictures when the batteries in my camera have charged. Are these suitable? Is there a post somewhere listing coil that can be used?

Thanks

Graham
FastG is offline   Reply With Quote
Old 05-11-2010, 10:34 PM   #2
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

Most of us use the 1ZZ Toyota coils (late model Corolla), which are four wire. I think I've heard of some 3 wires working, but not sure at all on 2 wires.

There is a good COPS write-up in the saved posts section...do these coils you have even physically fit?

Here ya go:

https://www.miataturbo.net/useful-saved-posts-8/upgrading-coil-plugs-all-years-cop-writeup-12704/
gospeed81 is offline   Reply With Quote
Old 05-11-2010, 10:49 PM   #3
Junior Member
iTrader: (3)
 
Join Date: Jun 2008
Location: NJ
Posts: 429
Total Cats: 0
Default

i got the toyota coils off either ebay or craigslist pretty cheap. Seem to fit real nice too, and there's plenty of existing knowledge on this forum about it.

If you're adventurous, good luck w/the coils you have.. i just went w/the crowd
ctxspy is offline   Reply With Quote
Old 05-11-2010, 10:50 PM   #4
Junior Member
Thread Starter
iTrader: (4)
 
Join Date: Jan 2008
Location: Chicago
Posts: 88
Total Cats: 0
Default

Thanks Gospeed, long post, it looks like to 2 wire are a no go. I will have to try and track down some 4 wire.

Thanks

Graham
FastG is offline   Reply With Quote
Old 05-11-2010, 11:02 PM   #5
Elite Member
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

3 wire ones should work too.
JasonC SBB is offline   Reply With Quote
Old 05-12-2010, 02:40 AM   #6
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

2 wire coils will work if you add the BIP373 transistor. Using two-wire coils, you will never fry them (a common problem with Miata coils), as the only part that may be burnt is the BIP transistor,, which is mighty tough, and should it get burnt, is cheap and easy to replace.

Dimitris
Reverant is offline   Reply With Quote
Old 05-12-2010, 10:44 AM   #7
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Those should work well for you, so long as you add the appropriate ignition modules. For a MegaSquirt ECU, you'll need (4) of these:
http://www.diyautotune.com/catalog/b...kit-p-230.html
or for a DIYPNP, you'll need (4) of these:
http://www.diyautotune.com/catalog/d...kit-p-387.html

Then you can run sequential ignition if you have the right hardware and enough outputs, or you can run them "wasted spark" with just spark outputs A and B by pairing them together.
Ben is offline   Reply With Quote
Old 05-12-2010, 12:34 PM   #8
Elite Member
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

To minimize electrical noise interference generated by such a setup, the 2 wires that lead to each COP should be twisted together.

The circuit with the BIP should have a largish capacitor (say 1,000 uF / 16V, low ESR type) across the 12V line which goes to the COP, and the GND or E pin of the BIP, with short traces or wires.

Better yet if you mount the BIP and capacitor near each COP. Then you twist the 12V and GND pairs, and mount a capacitors near the valve cover.
JasonC SBB is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
01-05 Fab9 PNP COPs (used) FrankB Miata parts for sale/trade 6 09-30-2015 12:48 PM
Koni 1150 Coilover Kit drumman83 Suspension, Brakes, Drivetrain 2 09-25-2015 08:03 PM
Reasonable source for NB coils. mx5-kiwi Race Prep 10 09-20-2015 08:31 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:56 PM.