what spark plugs are good for a BUILT b16 running high boost and what gap? not sure how much boost i will be running until it gets tuned but probably around 20lbs...

 

I wouldn't suggest running any boost until it's tuned...

NGK R5671A-8 gapped at .025-.028 should work fine.

http://www.phearable.net/shoppingcar...rbo-p-254.html

 

could i run it on the old tune for break in? it was actually tuned before the build...i just went from 450 cc injectors to 1000cc and just cams and all internals but i dont wanna break it in right on the dyno ya know...but anyways i just wanna get new plugs cause of the fresh build might as well replace the plugs too. i was thinking the denso iridium plugs-2 steps colder???

 

Without a wideband, I wouldn't recommend it.

 

Don't run an un-tuned motor. I've done it a couple of times. The bad consequences don't immediately show up, but the damage is there. Even if you tune it later, the damage will still exist. Don't do it. Get it tuned.