FFS you seriously need to do maybe 10 minutes of research before speaking on a subject. You continue to prove over and over again your "20 years" of experience is about as useful as zero years of experience. I don't believe I should see any oil or carbon on the spark plug crush washer or head spark plug mating surface. This would seem to indicate that the plug washers are not sealed, correct? deeper into the chamber is a country mile inside of a combustion chamber, and short of getting in the way of the spray pattern, would seem to be a good thing. Laser Iridium spark plugs provide superior ignitability and long service life. The smallest tip diameter available ensures slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions.

I should be in the 475 – 500 WHP range so I am just curious if you would recommend deviating from the recommendations above considering the WMI setup. However, they’re still generally good guidelines to follow. The more boost and heat you generate the more heat you need to move away from the firing tips. There isn’t much need or reason to go overkill and get too cold of a spark plug, either. The following is a specific list of our spark plug preferences: While colder options may exist the 1-step and 2-step colder spark plugs are the most common choice on the N54. Among the two most popular are the NGK 97968 1-step colder and NGK 97506 2-step colder. These are generally good options even for 600-700+whp builds, which is why we don’t fully agree with the 75-100 horsepower rule. Okay its gotten to that point where the influx of newcomers to the platform is rapidly rising and there are several common questions that get asked repeatedly and this will focus on a few maintenance items. For the sanity of the veterans to the platform, it is nice to have threads like these to reference. This post will hopefully answer some of those questions and I will update this as much as possible as information evolves. Lets get to it: Please debate, disagree, call me stupid ... ... I'd like the possibility of getting a bit smarter on all of this. And I'd like my timing corrections to drop - I'm pretty sure my setup is at fault.Can you speak on the impacts of running WMI and how that relates to the spark plug setup? Does WMI sufficiently cool the engine enough to make up for a full 1 step colder? What about gap sizing? When installing the plugs with Precision Raceworks coils on the N55 engine, we recommend setting the gap down to 0.022" For the above-referenced vehicles, BMW of North America, LLC (“BMW NA”) is extending the limited warranty for the fuel injectors to: NGK is the brand leader in the UK spark plug market and are the world’s biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals’ choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world.

For a customer to request reimbursement for a “qualifying customer-pay repair” performed either by an authorized BMW center or independent repair shop located in the United States (including Puerto Rico), please have him/her submit his/her reimbursement request “online” at www.BMW-RP.com .These plugs are suggested for most turbo BMW motors including the N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications. Which spark plug is right for each person, engine, mods, tuning, etc can vary a lot. That’s why we put some larger and overlapping power levels above. It’s not like all OEM spark plugs are going to start having endless issues right at 375-400whp. Likewise, 2-step colder spark plugs are probably OK even at 400whp.

There should be NO carbon or oil on the crush washer or the head seating area, yet I have it on multi-install 95770s all torque to spec. I would love someone to debate this as well. I don't know if anyone is paying attention to their plugs - but the 95770 have use once double wall aluminum crush washers. I would love someone to debate this. Mine have been in and out several times in 7k miles and I think that's an issue. These plugs are suggested for most turbo BMW motors including the N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications. Note BMW B58 uses a different NGK part found here.

What’s your experience with N54 spark plugs & gapping? What do you run and what are your mods, boost, & power? Often specified as original equipment, NGK Laser Iridium spark plugs are the best combination of performance and longevity.