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Old 05-28-2008, 09:24 AM   #1
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Default COPs with MS2

Hello all,

I'm building my MS2 right now but didn't assemble any of the ignition circuitry yet. I'm wondering if someone has some clarification or instructions on what to build for COP ignition. I understand I only need 4 trigger signals from the CPU, no need for drivers but I need a schematic to build the circuit.

Also, I have the 4-1 cas from a BP mazda protege and I noticed that it is the one to use, not the 4-2 miata cas. Can anyone enlighten me?

Thank you
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Old 05-28-2008, 01:27 PM   #2
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Also, what is the part number for the corolla plugs some of you are using? Are there any other COPs that fit the BP?

Are they 12V or 5V powered? switching ground?

Also, to run COPs on the BP, is the CAS 4-1 sensor enough or do I need another cranck sensor?

Thanks
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Old 05-28-2008, 01:34 PM   #3
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Part numbers (and everything else) listed here: https://www.miataturbo.net/forum/showthread.php?t=12704

For full sequential operation, the 4-1 CAS ought to work. Details here: http://www.msextra.com/ms2extra/MS2-Extra_4_1.htm

Coil driver info here: http://www.msextra.com/ms2extra/MS2-...n.htm#copsetup

The coils themselves are powered by +12, and require a +5v active-high signal to fire, so setup the MS wiring accordingly.
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Old 05-28-2008, 01:54 PM   #4
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Great, I will continue reading on this. I'll post more questions as I go.

Thank you for your great help.
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