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Coil On Plug [Merged 5-7]

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The real reason behind coil on plug is the reduction of vehicle content.
Yes spark plug wires are a weak link but the bigger issue for auto makers is that they cost money.
 
 
C.O.P. would probably be the deal for someone with an aftermarket intake manifold who had to relocate their coil pack.
 
Is this really worth it? I think Im having some ignition problems coming from the coils, either I get a oem replacement coil pack or the coil on plug setup. Any comments? Also, if i buy the dsm link would it be necessary to buy the msd ignition upgrade? Thank you.
 
From all that i've read on this board before, the COP setup is not really needed or very beneficial if you're making less than 500hp. I plan on getting one at some point anyways, just cause i plan on making over 500 someday. plus it looks great. If you've got the money, go ahead. as for the DSM link stuff, i dunno. sorry.
 
The stock DSM ignition can just about be made into a welder. It's one of the things they really did do a good job on. From others on this site, it's good up to around 400 hp. It's just not as pretty as COP setups if you leave the cover off.
 
I am a true DIY'er or maybe just cheap. I wanted to know what is the type of coil/part# used for the Coil on Plugs set up being sold by Buschur, Extreme, and Ebay. Thanks in advance!
 
I've been searching and searching, and I can't find out what kind of coils are used to make these. No one will tell me, so this is like my last resort If I can't find the info on my own? Anyone here know What coils are used on the Coil on plug systems for the Eclipses. I really wanna know? Thanks
 
I thought I had read they used some Chrysler coils, that may have changed.
 
Anyone have it? Feedback? I read somewhere that it sparks less than the OEM?
 
I bought buschur racing's cop for a 1990 dsm but I lost the paper they sent me on how to

install, and they arenot open on saturday so I cant call them and ask.

I have the buschur cop wire diagram that explains the wires that come with their cop unit but I lost the sheet they sent me explaining how the 90 coil was setup.

So does anyone have the wiring diagram for a 1990 coil pack

What color wire control cylinders 1&4, and what color controls 2&3.
What wire is the power source ?
Also what do I do with the 4th wire ?
 
I was thinking of buying the coil-on-plug setup. I was wondering if it really is necessary, if there's really any difference, or am I just buying a cleaner looking under the hood piece? Does it really deliver more spark?
 
yes to all you suggested. its a path of lest resistance. the spark plug wire has a resistance from the coil pack to the spark plugs. the bigger the wire the lest resistance, the smaller the wire more resistance. eliminating the wire deletes resistance and gives direct spark. look back on this web site and see all the post people have asked if going bigger spark plug wire is better than factory spark plug wires. people will state better performance better, fuel economy, etc.... it also looks good for the engine bay(clean). it is not necessary as people in the past and present have gone 10's on spark plug wires, but its one of those things i would wait for last if you got the money and are wondering, "NOW I GOT IT ALL DONE WHAT ELSE CAN I DO?"
 
DC resistance has absolutely no bearing on the issue of plug wires. The impulse from the coil behaves like high frequency AC and travels over the surface of the conductor.
Plug wire manufacturers will quote DC resistance as a selling point because noobs eat it up but it's pure bullshit.

I finished my homemade cop today. I don't expect a thing from it until I get a DIS-2.
It does look neat but that pretty much it.
 
OK 5mm plug wire is just as good as an 8mm plug wire and hotter or colder plugs mean nothing. when building a house try telling an electrician to use smaller gauge wiring its all the same thing. its not going to happen. current is current wether AC or DC. there is a point were you are going too small for the current you are going to need. that is called restriction. yes you can go too big but in this case it is not BS.
 
Restriction and resistance is not the same. Bigger wire does not mean less resistance. Not taking either side here.
 
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