What is the best spark plug for daily Ka-T 370-480hp?

[mikesloud]

What is some part numbers for NGK that you guys running in your setups for 14-22psi? I have some NGK PFR6-11 that I got from nissan house.

I am ready to buy some sevens if you guys recommend it and what exact part numbers.

[virus77]

ngk - bkre7eix

iridium sevens

[fiznat]

^^ thats what I use, gapped to .025"

[Structure240sx]

i have just used copper ngk bkr7es-11 since i have been turboing. they actually last a decent amount of time, not bad for $10. i wonder what gains if any i would get from iridiums

[Jeff240sx]

i have just used copper ngk bkr7es-11 since i have been turboing. they actually last a decent amount of time, not bad for $10. i wonder what gains if any i would get from iridiums

The idea is that the plug has a fine tip on it, and electricity spreads itself out over the width of the tip. So.. it's a concentrated spark, and harder to blow out. You wouldn't really gain power, I don't think. It'd be more like... gaining efficiency. You can de-gap from the coppers a bit, and gain a more complete combustion. This results in a slight power increase.. but really, nothing worth mentioning.-Jeff

[fiznat]

oops, I guess I didnt read carefully enough. I use the copper ones as well, BKR7E-11. Much cheaper than iridiums and they work just fine....

[Checkered-Member]

I hear good things about the HKS iridium heat 6...part number 5408-S30i

They are so cold they make Siberia look like Hawaii

[koukiKA240]

I use BKR6E-11 gapped to .032 i didnt think it was a good idea to go much smaller than that but i still have some spark issues in boost. I think ill try .025 before the next autoX.~Sam

[Jookmasta]

copper is just fine; one set of iridiums is equivalent to three sets of copper ones when you look at the price. i havent heard a nite and day difference with iridiums either