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. As you increase boost and power on the N54 you’re increasing cylinder combustion pressures. That leads to more heat than the N54 OEM Bosch spark plugs were designed to handle. In turn that may cause pre-ignition and spark plug overheating. Not good. However, going too cold can cause spark plugs to foul faster than normal. This is because colder plugs may remove too much heat and not successfully burn off deposits. Even then it’s best to run the factory gaps and adjust as necessary if you start noticing misfires or other issues. Some people instantly recommend gapping down to 0.022″, 0.020″ or 0.018″. We think it’s too aggressive for most, but there are some general guidelines. Here’s a rough breakdown: For the above-referenced vehicles, BMW of North America, LLC (“BMW NA”) is extending the limited warranty for the fuel injectors to:

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 aren’t exhaustive lists, but a few common BMW spark plugs. Champion are OEM on many newer BMW engines. Bosch and NGK are also common OEM spark plugs for BMW. N54 1-Step & 2-Step Colder Spark Plugs 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. For a B58 Engine with a Stage 1 or Stage 2 tune, you will need the Genuine BMW B58 High Power Stage 1/2 Spark PlugsWhen installing the plugs with Precision Raceworks coils on the N55 engine, we recommend setting the gap down to 0.022" Please note – power numbers below are rough estimates of where we like each spark plug. For example, some run OEM N54 spark plugs above 400whp without issue while others like to run the NGK 2-step colder spark plugs even at 350-400whp. If your current spark plug setup has been working then there’s not much reason or benefit to changing things. However, if you’re planning to add more power then it is usually a good idea to start considering higher quality, colder spark plugs. The ceramic insulation for the ground electrode on the 97506 is 5mm wide inside the steel shaft, versus 3.8mm for the 95770. I am boosting up as much as 21 – 22 PSI as I don’t care if the turbos go out because I am planning to go larger. Below we’ll list a few of the best spark plugs for the BMW N54 engine. Many of these are highly proven spark plugs. However, there are other good options that people have success with. As such, this isn’t an exhaustive list of all plugs for the N54 engine. These are simply products we recommend based on personal experience running these on our 2007 335i, 2008 135i, and 2008 535i.

I'm going to try to be as brief as possible but there are several related things I wish to bring up relative to plugs. I've done reading on Spoolstreet as well as other forum threads, with some success, but nonetheless ...It’s important to have the right spark plug setup on your modded N54 engine. They’re pretty simple parts but play a major role in proper engine operation. With many different considerations it can be challenging to determine the best setup for your BMW. Determining the right N54 spark plugs and gapping isn’t a perfect science, but there are general guidelines to follow. Ultimately, there aren’t perfect answers to any of these questions and sometimes it requires some experimenting. Following the general guidelines won’t hurt, though. We’ve found a lot of these guidelines work well on most N54 spark plugs. I am running full intake/exhaust, including FMIC, and diverter valves and am catless. I am running a BMS WMI kit with dual nozzle BC 10 Chargepipe injection. 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.

None of this information applies to the OEM Bosch 3-prong spark plugs. These should not be gapped. Once you reach the need to gap spark plugs you should be running 1-step or 2-step colder single prong plugs, anyways. These include the N55 OEM Bosch plugs and NGK 1 & 2-Step colder. Why Gap Spark Plugs? All spark plugs remove some heat from the plug tip and transfer that heat to the engine cylinder head. Colder spark plugs are faster and more efficient at transferring heat away from the spark plug tip. Basically when you hear cold plug it means the spark plug transfers heat away from the tip rapidly. Hot plugs are slower at transferring the heat, which means the firing tip remains hotter.

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Gapping spark plugs is another common topic for good reason. It’s important to have a good spark plug gap for many reasons. Too large a gap can cause misfire issues while too small a gap can reduce air-fuel burn efficiency. So, what is the right gap for N54 spark plugs? Let’s jump in and discuss the importance of spark plug gaps and recommendations for the 135i, 335i, and 535i. 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? 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.