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Old 03-17-2009, 04:17 AM   #1
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Default 01+ COPS with MS?

I'm wondering if anyone runs a MS with COPS on a 2001+. Searched but didn't find useful results.
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Old 03-17-2009, 10:02 AM   #2
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y8s. his is an '01 right?
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Old 03-17-2009, 10:16 AM   #3
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Schematically, they're no different from the '96+ coils as far as the OEM wiring is concerned. I see no reason why they wouldn't work, albeit the dwell profile might want to be re-examined, as the core & windings appear physically more compact.
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Old 03-17-2009, 10:36 AM   #4
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Quote:
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Schematically, they're no different from the '96+ coils as far as the OEM wiring is concerned. I see no reason why they wouldn't work, albeit the dwell profile might want to be re-examined, as the core & windings appear physically more compact.
I'm glad we have people like you on the forum with a remarkable technical comprehension so dumbasses like myself can have nice things and still be certifiably retarded.
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Old 03-17-2009, 05:18 PM   #5
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I'm glad we have people like you on the forum with a remarkable technical comprehension so dumbasses like myself can have nice things and still be certifiably retarded.
Seconded. I want Joe to have my babies.
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Old 03-17-2009, 05:32 PM   #6
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I'm glad we have people like you on the forum with a remarkable technical comprehension so dumbasses like myself can have nice things and still be certifiably retarded.
+1 .... I feel the same way about Paul.
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Old 03-17-2009, 10:07 PM   #7
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???

I can understand a little when folks go gaga over the complicated stuff, but this is easy ****. You look at the FSM wiring diagram for 03-05, and each coil has a +12 feed from the "engine" fuse, a ground wire, and a trigger line from the ECU that's +5 active-high. Exactly the same as all the other Miatas from '95.5 onward when they eliminated the tach wire and moved it to the ECU. The newer coils are packaged differently, but from from looking at the wiring diagram you'd never know they weren't the same part.
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Old 03-18-2009, 12:13 AM   #8
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evan, your ****'s an MSM isn't it?

item 1: the favorite toyot cops dont fit into the VVT valve cover. one has to change.

item 2: the MSM has a different valve cover. measure the spark plug holes. the COPs are .956 give or take. I'd want a full .040 larger than that just in case. call it 1 inch. if they're a little smaller it's probably fine.
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Old 03-18-2009, 01:39 AM   #9
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evan, your ****'s an MSM isn't it?
Yes. Thank you for not holding that against me.

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measure the spark plug holes.
Will do. Any excuse to use my digital calipers...
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Old 03-18-2009, 01:43 AM   #10
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Hold the phone ... I'm confused already. If 95.5 - 2005 are the same wiring for COPS, then why does Savington (here: https://www.miataturbo.net/forum/t20437/) offer different versions from various post-95 cars?
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Old 03-18-2009, 01:08 PM   #11
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Can you post a more specific link (like, to a particular message)? I skimmed through the thread but didn't see any wiring diagrams. They did change the connector in '03. From '96-'02, they used the same 4 position connector as '94-'95 but with only three wires in it. The '03+ coils went to a smaller three position connector. There is no apparent difference however in the signal levels, the wiring, etc. IOW- they're mechanically different, but electrically identical.

I'm sure there are some fitment differences in the bracket to hold the COP as well. '99-'00 had the cam sensor at the front of the head, '01+ moved it to the back. Plus there was the switch from the rear-mount coils to the CNPs, which would have required another mechanical change to the valve cover.
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Old 03-27-2009, 07:33 PM   #12
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Quote:
Originally Posted by y8s View Post
item 1: the favorite toyot cops dont fit into the VVT valve cover. one has to change.

item 2: the MSM has a different valve cover. measure the spark plug holes. the COPs are .956 give or take. I'd want a full .040 larger than that just in case. call it 1 inch. if they're a little smaller it's probably fine.
Finally measured today. Couldn't get an exact read because I had to approach the hole at a vertical angle. Hole diameter is approximately .935, so apparently the COPS you mentioned will not fit. So, would I have to change the valve cover? Hate to give up that nice MSM krinkle-coat red with the "turbo" lettering on it .... but performance comes first ....
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Old 03-27-2009, 08:01 PM   #13
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i used a 1" flap wheel and went to town.

or you could find smaller COPs.
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Old 03-28-2009, 05:43 AM   #14
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****. I have my Toyota COPs sitting right here, I never knew that they don't fit. What part of the pencil doesn't fit? Is the girth of the pencil bigger than the hole's diameter? (I tried really hard to write this down without this being another quote on someone else's sig, but alas, I failed miserably).

Jim
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Old 03-28-2009, 11:19 AM   #15
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this is how far:



more
miata photos - a set on Flickr
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Old 03-29-2009, 04:51 AM   #16
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So how did you get them to fit? Did you trim the cylinder head holes?

Jim
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Old 03-29-2009, 11:31 AM   #17
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I just want to say that I am not helping on this project. EK, you're on your own.
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Old 03-29-2009, 01:08 PM   #18
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Quote:
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So how did you get them to fit? Did you trim the cylinder head holes?

Jim
lots of verbal abuse. swearing at it.

and while I did that, I killed time by running a small head porting drum sander in the holes.
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Old 04-02-2009, 03:25 AM   #19
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Anyone find skinnier COPs yet?
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Old 04-02-2009, 09:55 AM   #20
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Gotta get the young ones before all the coffee and donuts take their toll.
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