NGK Iridium IX part number? BKR7EIX-11 I'm assuming?
 

EDIT: went ahead and ordered the BKR7EIX from sparkplugs.com instead and got two day shipping so i can have them before this weekend when i hopefully will dyno. any suggestions on how I should gap them, since the spark is so much better than copper under high cylinder pressure conditions (that throws my current gap out the window most likely) or just start out big (like .040) and start dropping the gap if I start to have problems? this will be without KB Boost-A-Spark for now until after I get this trans built btw.


Just wondering if anyone has any other opinions on this. I'm trying to buy some NGK Iridiums on ebay right now, and since the proper copper PN for our car is BKR5E-11 (or 7E-11 in my case) I am going to assume that BKR7EIX-11 is what I'm going to want? They have BKR5EIX-11 listed for most nissans, and then a bunch of other funky part numbers that don't look anything like our part numbers for other cars.

i would think that .038 would be a better starting place than .040

where are they gapped to right now? less than .03x?

didn't mardi get 2 step colder platniums?

How much boost are you running, Neal?

right now I've got 2 step colder coppers, gapped to .032 if my memory serves me correctly. I'm running 14.5psi right now, cranking it up to 16ish is likely in the next month or two. probably no higher than that without my own WBO2 or J&S or race gas.

Nealoc187,

So what is the part # for 2 step colder plugs. I need to order some.

Thanks

For 2 step colder coppers its bkr7e (the -11 on the end just tells what the gap is, which you can change yourself), for 2 step colder iridiums its bkr7eix.

http://sparkplugs.com/more_info.asp?AAIA=&pid=15057

I just want to make sure these are the right ones right?

Thanks

Those are the ones I ordered. I don't know if those are the correct ones that's why I posted the question. Common sense tells me they are the right ones but no one who's using them has said for sure. I guess if my motor blows me to the moon I will know they are the wrong ones, but I suspect they are the correct ones.