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Old 07-21-2013, 11:21 AM   #31
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Originally Posted by jdmzx5 View Post
I have been told by engineering that it's a risk to burn the drivers, and pcm prices are high. Also I've replaced many pcms with failed drivers due to bad coils and high resistance power circuits to the coils. The factory setup fires one coil, then when the field collapses, the other coil fires, the system Fires multiple sparks below 2500 rpm, and the rest is waste on compression and exhaust. What is your reasoning for disliking waste spark? Getting rid of it won't free up power
Ok so then in this instance my COP setup fires 2 coils at one instance. However, it still requires less amperage to fire them both than it does to fire the stock single coil. I still don't see how the drivers are going to burn up with my setup? From computer to spark pug tip it has less resistance than the stock setup did.

I have two spare PCM's here that I bought for under $100 at the local scrap yard... not sure where you are getting your prices, unless you are a tech @ a dealership replacing them with brand new units?

Why don't I like wasted spark,
I don't see the need to waste spark on the exhaust stroke. I would rather fire my coils once per 720 of engine rotation then twice. Seems like it would be much easier on the system to have them only fire once. Then all these worries about overheating or burning drivers and other system components would be cut in half.
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Old 07-26-2013, 09:26 PM   #32
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I am running VW/Audi 4 pin coils on mine. Full Sequential as well. How, might you ask? Megasquirt3
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Old 08-02-2013, 01:38 PM   #33
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Would much rather be running smart coils fully sequential as well. I have 2 sets of Honda K series 3 wire smart coils that I will end up using when I finally decide to swap in my ITB's and tune with my MS3. ;)

For now I'm just playing with stuff I have laying around the garage!
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Old 02-19-2014, 03:39 PM   #34
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Finally got around to mocking up a set of my Honda K series coils with the aluminum valve cover and spare cylinder head. Took me a little while to get everything lined up, cut out and drilled on the cover plate.... Thankfully first one worked out.



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Old 02-19-2014, 03:56 PM   #35
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Way too tall.
Buy shorter boots and you can get them to sit flush.
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Old 02-19-2014, 04:05 PM   #36
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I'm not 100% but I think these are a fixed length coil. The boots are only 0.5" tall. Besides, the 1/2" extra length will help keep the ignitor and coil cool. Once the individual throttles and air box are installed you won't even notice them.

Cost me $50! I'm not really looking to put a lot of money into this build...... The engine management will be the most expensive part. Everything else will be in the rat rod tradition of throwing available parts at it and if they don't fit, you make them fit....
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Old 02-19-2014, 07:13 PM   #37
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Quote:
Originally Posted by jdmzx5 View Post
I have been told by engineering that it's a risk to burn the drivers, and pcm prices are high. Also I've replaced many pcms with failed drivers due to bad coils and high resistance power circuits to the coils. The factory setup fires one coil, then when the field collapses, the other coil fires, the system Fires multiple sparks below 2500 rpm, and the rest is waste on compression and exhaust. What is your reasoning for disliking waste spark? Getting rid of it won't free up power
There has been a lot of guys do this over the years , its all for looks and wont hurt anything in the ECU , no performance gains come from adding the COP

Tom
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Old 02-19-2014, 11:13 PM   #38
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There has been a lot of guys do this over the years , its all for looks and wont hurt anything in the ECU , no performance gains come from adding the COP

Tom
If there are no gains to a COP system. Why is it that pretty much every auto manufacturer switched to fully sequential ignition with a coil on plug per cylinder? I will agree that there really are no gains to be had going COP on a wasted spark system and a stock or ROM/flash tuned ECU.

Wasted spark and single CDI coils are old tech. Individual coils are for more than just looks. Specially when you have an EMS that will allow you to make use of them and individually tune them for better emissions and power per cylinder.
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Old 02-19-2014, 11:13 PM   #39
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It's an added bonus that they look really cool.
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Old 02-19-2014, 11:23 PM   #40
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Quote:
Originally Posted by GhostTribute View Post
If there are no gains to a COP system. Why is it that pretty much every auto manufacturer switched to fully sequential ignition with a coil on plug per cylinder? I will agree that there really are no gains to be had going COP on a wasted spark system and a stock or ROM/flash tuned ECU.

Wasted spark and single CDI coils are old tech. Individual coils are for more than just looks. Specially when you have an EMS that will allow you to make use of them and individually tune them for better emissions and power per cylinder.


Emissions plane and simple.
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