NGK did an excelent job on a write up for tech info on spark plugs

here's the link: http://www.ngksparkplugs.com/techinfo/spar...1000&country=US

the only question I have now is, what is better for a turbo DSM, NGK-R or NGK Iridium???? I have heard both arguments, but are still undecided... I know that buscher is running 8's on NGK-R....

I have been told that Platinum is bad for turbo applications because the spark will "blow out" but haven't heard the same about Iridium until yesterday....

has anyone had experience with this????

please reply

BPR7ES is the plug you should use. Who told you Buschur was using 8's? I run 7's in the race car and I just recently tried 8's. The 8's have a weaker spark and if you are running rich they will foul easily. The 8's can be tuned to work, but I would stick with the 7's if I were you.

I don't know anything about the iridium plugs.

allright, i'm definetly out of my league here. I have to run to work, other wise i'd do some quick searching.
But, i believe I was told that you should use 7's only once you're either making a certain amount of hp or have some certain mods. I can't remember it correctly.

But just to play the devils advocate and wait for some clarification.
thanks.

I'm running 7's and im sure my car is running rich, lean, whatever, at different rpms... Never had any problems

I've run BPR7ES and BPR8ES's, both gapped to .28. I had no problems with either, but for the most part I've been running better on the 7s.

sorry for the confusion guys, I was talking about 8 and 9 sec runs not spark plug model.....

the Tech people at NGK swear up and down that platinum is ok to use in boosted applications, but I was always told that this is bad...
They also said that they sponsor a car on a pro drag circuit running 50 lbs of boost and iridium is the only thing that will stay lit.....