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Discussion Starter · #1 ·
Hi There,


I have all was want to try out the new OKD Okada/Plasma Direct coil on our E60 M5 and I did some research online and on the forum to see if anyone has try this set up before, and see like there is no article about the subject regarding the product. So I decide to order a set and some new spark plugs to see is the product going to make any difference on the car, and on the pass weekend I have the opportunity to install the new setup and I’m quite happy with it and decide to share my experience with you guys. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
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Here is my install process on changing the spark plugs and the coil and I know there is people out there can do it faster then I’m but it takes me 4 to 5 hr from start to finish. You need to take off both intake air box to make more room to work and both cabin filter housing & plastic cover need to come off to get to the back two screw of the strut tower brace, then take the front two screw off and remove the strut tower brace off completely. After that you can get to the water reservoir tank on the driver side. To remove the reservoir tank, there are two screws holding the tank and one connector with 2 wires that need to be disconnect, but leave all the water connection untouched and then flip the whole water tank toward the front driver side head light to have enough room to work on the coil and plug. To remove the plug & coil, you need to take the plastic plug & coil covers off first by carefully pulling up from both end then the plastic cover will come off from the valve cover (Note: The plastic cover is hold in by two rubber o ring). Once the cover is off you can see 5 coils on each bank. To remove the coil, you need to flip the top locking cover up from the tip of the coil then remove the coil connector and after that you can pull the coil off and remove the spark plug. The last two plugs and coil is the hardest, there is not a lot of room to work with and it going to take some time to get them off. After all 10 cylinders are done then you can put everything back in the reverse order.

As for the plug, it’s going to cost you about $35 to $40 each from BMW and you need to torque them down @ 23 Nm.

The Okada/Plasma Direct coil for the E60 M5 has 4 times more spark energy than stock coils and also generates an ultra fast multi spark discharge of 10 sparks up to highest RPM.The spark amperage is increased 100%, allowing the spark to reach many more molecules and therefore accelerate the ignition and combustion process, and the unit is plug and play no cutting of wire and it cost about $2,300 to $2,700 depends on where you get them.

After the install of the new OKD coil with the OEM spark plugs, the engine seem to idol smoother and the RPM came up quicker. You can even hear the engine sound stronger then before. I know people are going to argue because the new spark plug in the car and that is why the car feels difference and run batter. But since I install both units at the same time, I can only tell you what the car is doing with the new setup. Who Knows??? Because of new plugs or new coil or even both????<o:p></o:p>
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Now after three days of driving with the new set up, the car did run stronger then before and the RPM came up quicker, I even notice I need to go through the gears more often the before. The car feels stronger in both P400 & P500 mode and I know my current setup with the addition of the coil, it did make a difference on my car and even the exhaust fume smell cleaner, less of that unburned fuel smell.

I’m very happy with the purchase and I think the OKD coil is a good plug and play product. Despised the cost different to the OEM coil, you’re going to squeeze out that extra HP out of you N/A V10, and you can tell your wife that is a maintains item on the car, and you have to have it to save gas!<o:p></o:p>
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Good write up. Personally I never heard about OKD... I guess these are for "better fuel mileage" rather than adding HPs. I may be wrong. it seems you are the first member with OKD product....
 

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STM, do you feel any difference in performance with the OKD coils? I'm planning to replace the coil on my e92 m3.
 

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It looks like you have RPI scoops going into Dinan airboxes and maybe Dinan MAFs. How do you like the combination?
 

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Discussion Starter · #6 ·
Hi Guys,
Sorry for the late update, last week someone broke in to my SUV and stole my laptop and some other stuff, and it cost me a lot of trouble from work and everything else. But any way I’m back and like to give some update on the M5 and answer some question for the fellow M5 brothers. The car still running strong and have no problem what so every and the engine is running cleaner than before, and the unburned fuel smell is not that noticeable. I’m very HAPPY with the upgrade!!!!!!!
As for the question from:

Miguex: Thanks for reading on my write up, and YES I HAVE TO TELL THE WIFE THAT THE MILEAGE GOT BETTER OR WISE SHE IS GOING KILL ME!

Clyde: Thanks for reading, and I guess you and I are doing the same thing on that weekend and I hope you are not think like I am when I was working on the car, “I’m getting to old for this and my back hurt”!!!

Gasterus: I did feel the difference in performance with the OKD coils, and I think it should be a good upgrade for your E92 M3. After the coils install on my M5, the car feel stronger and smoother when the engine is running high RPM. I personally think our N/A engine needs all the help it can get to achieve max performance. I used to work on turbo Mitsubishi Eclipse GSX and 3000GT VR4 all day long and some Honda / Acura too, and every time when I try to get more power out of them it all fall under the same fundamentals. More air in to the engine = need more fuel = need more spark = good AR = Power. Especially with the N/A engine we have, every little upgrade will help on the performance and we need to get as much air in to the engine as possible and a good spark to ignite that fuel mixture to get good HP!!!!!!!!!!!! Man I miss my turbo car!!!!!!

Mike Krieger: Yes I do have the Dinan air intake system and MAF upgrade with the RPI scoops. I think the combination work great with the car and the scoops help on getting more air in to the air box. I know RPI has done a lot of testing on the block off plate for the M5 and it seem like they are trying to create more intake pressure by blocking the bottom intake duck and only use the front intake duck as the primary intake source. As for my setup I did not us the block off plate from them, but I have use two 2.5”ID silicon coupling with the 90 degree bend that I install inside of my lower in take duck to capture more air flow from both direction/front & bottom. With this set up I have increase intake air pressure inside the air box and force more air in to the engine. I have talk to Steve Diana about this set up when I got my custom header make and install at their facility in Mogan Hill and Steve think is will get couple extras HP out of the engine but with the trade off of less air going to the brake for cooling. I have this set up for more than 7 months now and I have no problem with the brake and I drive the car every day.

I hope this write up have answer some question for people that are looking for upgrade ignition system for the S85 and hope the picture is going to help for board member on changing their own spark plug in the future and thanks for reading.

P.S MAN I WISH BMW MAKE A V10 TWIN TURBO M5!!!! BUT SEEM LIKE IS TOO LATE NOW~~~~~~
 

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STM5 Great post! very helpful... I wonder if you have noticed more MPG? since fuel is being burned more efficiently... cheers!
 

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Discussion Starter · #8 ·
Hi JB's M5,
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As far as I can tell the MPG did not go up, but the car feel more smooth at idles and faster acceleration all around. I have Dinan customer header and complete exhaust with no CAT, and I have notice before the coil install my exhaust smell rich at idles, and after the coil install the smell has gone. <o:p></o:p>
 

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Thanks STM5, I was just curious on the MPG...
 
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