Spark Plugs to use in a N55 with tune

[turbo v6]

Has anyone compared the performance of OEM spark plugs vs NGK in an N55 that has a tune producing 330+ whp?
At what level if any would it be better to use the NGK's.

[dcaron9999]

Originally Posted by turbo v6

Has anyone compared the performance of OEM spark plugs vs NGK in an N55 that has a tune producing 330+ whp?
At what level if any would it be better to use the NGK's.

Stick with OEM or equivalent. N54 and N55 spark plugs are slightly different.

I run a stage 2 agressive custom tune, and I changed them recently, and stuck with OEM equivalents. Some use cold spark plugs with tuned cars, but I dont think it makes much of a difference, and may even lead to misfires.

With tuned engines, you need to plan for frequent replacement of stock plugs, around every 20-30,000Kms (12,000-20,000Miles). It's easy as a DIY with a proper socket for N54/N55 engines. Plan for a 45-minute job, most of which is spent removing/installing/displacing cowls, cables, and covers ...

[turbo v6]

Just to add to this thread:

What about gapping the OEM spark plugs if needed?

[Dackelone]

Originally Posted by turbo v6

Just to add to this thread:

What about gapping the OEM spark plugs if needed?

Its pretty much impossible to gap the multi electrode spark plugs bmw uses. Just buy new spark plugs from a BMW dealer and be done with it. There is no real performance to be had by changing spark plug manufactures or types.

Dack

[MightyMouseTech]

Originally Posted by Dackelone

Its pretty much impossible to gap the multi electrode spark plugs bmw uses. Just buy new spark plugs from a BMW dealer and be done with it. There is no real performance to be had by changing spark plug manufactures or types.

Dack

Just put in the stock plugs with the stock gap.

[turbo v6]

Also look at this thread by PTF:

http://www.e90post.com/forums/showthread.php?t=1185946

They recommend using N20 plugs, gap "it down to 0.018-0.022" for high boost"