N54: The best Plugs, Injectors and Coils Thread

CAA

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Sep 13, 2017
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Swapped oem coils back to the car and ignition running with an acceptable timing again:
2_ND_WALBRO_ACTIVATED.png

Not perfect, but more suitable than with the BL coils, even with more IAT:
BL_IGNITION_2.png


Logs made on my car, 6266 only on 98RON, no meth/e85. Same plugs on both logs: NGKs 5992 gapped to 0,022.

The coils do NOT sit correctly straight out of the box. This is NOT a plug and play kit. I too broke my connectors as they did not fit properly. I have fixed all issues and these coils WORK. However, the kit is way over priced for what I received. Anyways, I did some trimming on the coil sleeve to get proper fitment.

Could you show with a pic where is the exactly part of the BL coil you've trimmed?
I thought that my coils has been correctly seated when i was putted them on my car, didn't know that was necessary to put them more deepth through to the plug.
 

JBacon335

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Nov 7, 2016
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I've had issues with the connectors for sure, I've got them electrical taped together as it seemed like they would come apart and I'd get random misfires. Oddly it was only on cylinder 1 and 3. I've been running these since last summer, I never had an issue with them not sitting down on the plugs enough and mine look like your initial install pic
 

SlowE93

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Thats because they are not all the way down. Like I have said before they may work that way but for sure it's not the correct way. This is supposed to be an upgrade to the BMW Ignition coils. BMW would NEVER design an Ignition coil that doesn't fully engage the spark plug.
 
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JBacon335

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My experience was just the connector that goes to the factory wiring harness being an issue, after getting that secure there were no longer any problems. Sorry you weren't in the same boat
 

SlowE93

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Youre missing the point. If you lived close to me I would let you swap 1 of your coils for mine and you would see the difference in fitment. I guarantee you would then pull all your coils and modify them to fit properly.
 
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JBacon335

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interesting. I have a spare from advance auto to play with that I keep in case of emergency. might have to modify it and see what you're saying
 
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ninjacoupe

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Apr 25, 2017
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I'm already considering it lol. what did you trim? the 2 rubber stops on either side of the coil?

I had a few spares and a block head and valve cover. Was just messing around. It is only the little rubber line on the grommet at the top of the coilthat stops it from seating fully down. Hits the valve cover. Easy trim but confirmed it does hold it up about 1/8 of an inch.

I went so far as to cut the metal sleeve on the coil off completely and it made no different. That whole rubber peice can be slid off or trimmed in place.
 

SlowE93

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Interesting. I started out trimming that and didnt change anything. For me it was the sleeve as it has no room deep down into the plug. We use thin wall sockets for a reason. Very tight space down below. Glad it worked out for you with less hassle though.
 

ninjacoupe

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Apr 25, 2017
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I tried it on a head with no valve cover. I actually peeled the metal back and cut to rubber off to where it meets the plug on one coil and it sat exactly the same as the untouched coil. It was tighter but it went all the way down. I even used a small price of clay on top of the plug to see if there was any space. It wasn’t until after I put the valve cover back on t
Hold up. Did you try this and drop it into the head with a sark plug in place ? Or just the head itself ? Because the problem is at the bottom when the plug is in place. Theres no room for the sleeve. At least in my case which all N54 heads should be the same.

I used a stock spark plug in the head for all the testing I did.
 

doublespaces

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Oct 18, 2016
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I can confirm, the metal shield/sleeve requires trimming. I don't think anyone who has this has the coil seated properly on the plug.