what kind/heat range of spark plugs do you use

[bimmerboy08]

I've heard going 2 heat ranges colder is good for a boosted car, but since you guys are the boosted e30 experts I'll ask you. My car runs 8psi boost right now on the recommended heat range plug, but I need to change them out.

[TS87325IS]

Iam still running stock coppers , but have only been boosted for about 2 months and don't daily my e30. but they seem fine still and i am running 7 lbs.

[Danny]

Yep, 2 steps is fine.

[bimmerboy08]

sweet thanks guys

[bimmerboy08]

hey just for anyone searching in the future, I've got part numbers:

for one heat range colder its NGK plug BPR6ES
for two heat ranges colder its NGK plug BPR7ES

bosch doesn't have plugs available for colder heat ranges.

[nando]

I'm planning on running BPR6ES with my stroker (been running OE bosch until now), for turbo I'd probably go for the 2 heatrange colder plugs.

[bimmerboy08]

cool thanks, thats what I ended up ordering!

[Madhatter]

in future its simply better to have a look at the state of your plugs. If they are too cold they will get sooted up and foul, especially if left sit for a period of time while idling. Just keep changing up a range until the plugs clear. Quite often you find you dont need much of a change at all.

[blueapplesoda]

I got tired of changing spark plugs...I dislike coppers.

hotter plugs idle better and help throttle response down low, but get overheated during prolonged abuse.

Stock NGKs would be bpr5es

I am currently using NGK BPR7EIX iridium plugs, 2 steps colder.
for the track, i use BPR8EIX, 3 steps colder

thumb of rule...for every 85-100hp increase, take 1 step colder.