|08-02-2013 02:38 PM|
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!
|07-26-2013 10:26 PM|
|Hardline||I am running VW/Audi 4 pin coils on mine. Full Sequential as well. How, might you ask? Megasquirt3|
|07-21-2013 12:21 PM|
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.
|07-21-2013 12:00 AM|
|jdmzx5||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|
|07-20-2013 05:54 PM|
I did a quick google search and only saw one person even make mention of drivers burning up with this setup. They said that if the draw was too large that they could burn up.... However as shown above as long as the coils you are using require less current draw I don't see the issue.
You say that there are no benefits to converting... I find that odd as every manufacturer has now moved to using some sort of COP ignition setup. Sure converting to COP and using the wasted spark system is complete BS. I despise wasted spark setups personally. I will be using my MS3 with smart coils soon enough. I just happened to have these coils sitting around from another build and figured that I would give them a shot.
Cut up an old coil I had sitting around to use the connector and maintain the stock wire harness connector.
Still have to get some wire covers and get rid of the stock coil bracket.... kind of ugly sitting there on it's own.
|07-20-2013 04:50 PM|
5+ years on a COP setup, about 50,000 miles.
I'll call BS on burning up anything.
|07-20-2013 04:26 PM|
This is what I used to figure out my current draw.
Stock EDIS 4 coil pack;
I = 12V / 0.7 ohm
I = 17.14 amps to fire a coil
my Denso pencil coils;
I = 12v / 1.8 ohms
I = 6.67 amps to fire a coil
So it would take 13.34 amps to fire the 2 pencil coils. That is still less than the stock single coil draw
So does this look right?
|07-20-2013 03:15 PM|
The pcm drivers will burn up due to excessive draw from the cop setup. You would have to change to a megasquirt setup. There are no advantages to a cop over edis. The edis system
Draw is equivalent to two cop coils. Four would be twice the draw.
|07-20-2013 02:57 PM|
The PCM/ECU or the EDIS module?
Could you please pass on some technical info along with your warning? What is it exactly that burns out the drivers?
I tested the resistance and the current draw with the coils that I am using and didn't see anything that would cause a circuit/driver to burn up.
|07-20-2013 02:03 PM|
|jdmzx5||Hey guys just want to warn you not to convert to cop, you will burn the coil drivers in the pcm.|
|This thread has more than 10 replies. Click here to review the whole thread.|