spark plugs for supercharged 328

[Murchie]

Hey guys,

I'm looking to change the spark plugs on my newly acquired 328. What plugs do you guys recommend for a supercharged 328is? Or is stock good enough? Also what gap and torque specs? Thanks

[iverson03tj]

i went with oem in my supercharger... no problem... i used ngk brand.. dont use bosch... i initially bought the bosch ones and the car started to act a little funny... rpm would drop sometimes... but it works amazingly with the ngk...

[bmdbley'sBro]

yeah people seem to swear by NGK for FI

Murchie you can always go with a Colder plug if you're getting pinging

[Lang75]

I know with the Nissan Z cars the NGK's are sworn by. The issue with platinums is that they are not designed to run with very high compression or boosted engines. I haven't heard anything on the iridium plugs on boosted engines, but would recommend staying with the standard designed ones.

[iverson03tj]

im not sure but the only reason manufacturers use iridium is because its lasts longer.. which makes there cars less maintenance.... i hear copper is good??? again its words i heard... not proven facts

[Lang75]

When I bought my 328, it had these bosch plugs which had four prongs open centre, the size of the anodes and cathodes were the same as convetional ones as these were not platinum. I replaced mine with iridium after doing some research, and the engine was more responsive, ran smoother, i found myself shifting 500 rpm later under normal driving. So I will recommend them for a NA car, but as mentioned I can't comment on boosted applications.

[SiR]

ngk bk6re


or bk7re if you want one step colder.

[iverson03tj]

http://store.bimmerworld.com/ngk-iri...ugs-p1267.aspx