COP Unit... Using Chrysler 300 coils

[DSM_IKE]

So i picked up a COP unit from a Guy here who did a really good job fabricating this unit. Down below is a picture of the product, Let me know what you think about using these coil packs.. I hooked it up to test when i bout it and it seemed to work great, he informed me however that i would need to re-gap the plugs to .022


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[DSM_IKE]

or do you guys think i should get some coil packs from a 97+ Mitsubishi Mirage? The Mirage has the same coil packs as the evo 3.

 

[magik95]

I use coils from a intrepid. Seem to work fine, never heard of regaping the plugs to .022.
Did he give you a reason for that?

 

[toofast82]

You do know, to get the most of your COP setup you'll need an ignition box like a MSD DIS-2 or equivalent.
I'm not sure why people deviate from the stock ignition system when its capable of handling so much power and basically trouble free.

 

[big_d]

Is there a reason you went cop? Real good benefits over wires on a stock ignition system...


^^^ beat me to it.

 

[DGajre777]

Those don't look like 300M coils, the bolt pattern isn't right. Here's the one that's on my car with the 300M coils.

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I've never heard of gapping the plugs to 0.022 either, I gap mine to 0.028.

I would wrap all those wires in electrical tape and then use wireloom and electrical tape again or use heat shrink. You will also need to shorten the springs so the spark plug can sit correctly without over-compressing the spring.

 

[TurboAnything]

You do not cut the tops of the boots. They say to cut the springs where the top is near the coil but not the boots. You trim them just above the mold lines on the bottom. And they look to be 2.7 coils.

 

[DSM_IKE]

I use coils from a intrepid. Seem to work fine, never heard of regaping the plugs to .022.
Did he give you a reason for that?

You do know, to get the most of your COP setup you'll need an ignition box like a MSD DIS-2 or equivalent.
I'm not sure why people deviate from the stock ignition system when its capable of handling so much power and basically trouble free.

Those don't look like 300M coils, the bolt pattern isn't right. Here's the one that's on my car with the 300M coils.

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You need to get new spark plug boots and cut them from the TOP not the bottom, like the ones in your picture. You will also need to shorten the springs so the spark plug can sit correctly without over-compressing the spring.

They guy said that he was having issues with misfire until he re gaped his plugs to .022

I understand to get most out of cop is with msd or similar, but until i can afford to get as such this will have to do for now. The main reason i am switching to COP is to eliminate the coils from under the intake mani which in turn will make it easier to daig and replace 1 pack instead of the entire unit if 1 goes bad.

I was planning on going to get new boots already, i have not installed the unit yet and was not going to till i got new boots.

 

[DSM_IKE]

oh yea and the packs were used from a 1999 300. I looked them up at autozone and they match what i have


But another question hasnt been answered yet, what do you guys think about using coil packs from a late 90s mirage?

 

[toofast82]

I understand to get most out of cop is with msd or similar, but until i can afford to get as such this will have to do for now. The main reason i am switching to COP is to eliminate the coils from under the intake mani which in turn will make it easier to daig and replace 1 pack instead of the entire unit if 1 goes bad.

As long as you know you're currently running a weaker ignition system than stock without ignition box, the decision is all yours

I've never had a coil fail on any of my dsms and think diagnosing a potential coil issue is very easy on the stock setup. There's only two separate coils stock versus four on a cop setup

 

[DSM_IKE]

So i need to know why a cop is weaker than a stock ignition system. Can you please inform me why the cop system is worse than stock coil packs.

 

[DGajre777]

http://www.dsmtuners.com/forums/bolt-tech/166642-cop-coil-plug-ignition-merged-1-8-a.html

You do not cut the tops of the boots. They say to cut the springs where the top is near the coil but not the boots. You trim them just above the mold lines on the bottom. And they look to be 2.7 coils.

You're right, I just went through my pics and edited my post. For some reason I thought I cut the boots from top too, but I cut the boots from the bottom and the springs from the top.

 

[big john 2 g]

nice look good need some help guys i gust got a set of new Mitsubishi OEM Rocker Arm for my 95 dsm 2 g and the hole ware the lifter gos is a lot smaller than the old ones need help ### thank you

 

[DSM_IKE]

^^ Thats completely off subject. ^^

 

[LambdaJoker]

As long as you know you're currently running a weaker ignition system than stock without ignition box, the decision is all yours

Care to elaborate more on this? Why is an ignition box needed?
I'm ASSuming that without an ignition box, perhaps i have a weaker spark?

I am currently running a COP with 300m cops without an ignition box, but thats how i bought the car. I never bothered converting back to the stock ignition system since i never seemed to have an issue with the COP since spark is always there and my car starts right up (well when it's not on jackstands broke down).

 

[DGajre777]

Care to elaborate more on this? Why is an ignition box needed?
I'm ASSuming that without an ignition box, perhaps i have a weaker spark?

I am currently running a COP with 300m cops without an ignition box, but thats how i bought the car. I never bothered converting back to the stock ignition system since i never seemed to have an issue with the COP since spark is always there and my car starts right up (well when it's not on jackstands broke down).

An ignition box is needed when you starting increasing HP. For a stock/300ish HP range, you don't need an ignition box on COPs. I have the JMFab plate with 300M coils WITHOUT an ignition box, but if/when I need to upgrade I can hook them up to an ignition box. I personally got tired of replacing spark plug wires every 2 years and went with COPs that I picked up from a junk yard for $20. The most expensive part of the project was the JMFab plate.

Everyone has opinions on COPs. Some people look at COPs as a waste of money when you could be spending the money on something else, while others think you are replacing the good stock ignition system with a weaker one. COPs work fine on DSMs, until you hit a certain point. After this point, you'll need an ignition box to make them work, but if you kept your stock ignition system you won't need a box. Hence the "weaker spark" theory. The common misconception is that everyone is building 400+ WHP DSMs.

There's also the theory that less "energy" is wasted since the coils are closer to the plugs, even thought the COP Coils may not be as powerful as the stock ignition system coils. Everything is speculation at this point, and will continue to be until someone has some concrete numbers and data to back up theories, but we do know that the stock ignition system is being used on some very high HP cars and they work very well.

 

[donniekak]

So i need to know why a cop is weaker than a stock ignition system. Can you please inform me why the cop system is worse than stock coil packs.

The DSM ignition is wasted spark. The stock system uses a transistor to discharge a coil, that goes to two plugs. When you go COP you are running two coils off of each transistor, outside of their design parameters.

 

[LambdaJoker]

An ignition box is needed when you starting increasing HP. For a stock/300ish HP range, you don't need an ignition box on COPs. I have the JMFab plate with 300M coils WITHOUT an ignition box, but if/when I need to upgrade I can hook them up to an ignition box. I personally got tired of replacing spark plug wires every 2 years and went with COPs that I picked up from a junk yard for $20. The most expensive part of the project was the JMFab plate.

Everyone has opinions on COPs. Some people look at COPs as a waste of money when you could be spending the money on something else, while others think you are replacing the good stock ignition system with a weaker one. COPs work fine on DSMs, until you hit a certain point. After this point, you'll need an ignition box to make them work, but if you kept your stock ignition system you won't need a box. Hence the "weaker spark" theory. The common misconception is that everyone is building 400+ WHP DSMs.

There's also the theory that less "energy" is wasted since the coils are closer to the plugs, even thought the COP Coils may not be as powerful as the stock ignition system coils. Everything is speculation at this point, and will continue to be until someone has some concrete numbers and data to back up theories, but we do know that the stock ignition system is being used on some very high HP cars and they work very well.

alright, so since my dsm isn't close to 300 hp yet, my cops work fine. so before getting more power out of my dsm, ill get an ignition box. thanks for the info. i dont want to go back to my stock ignition system, since i like how much cleaner my engine bay looks with the cops.