Change spark plugs for 12psi?

[DJLimes]

Going from stock n/a to turbo'd at 12psi, and I remember reading that colder plugs would be ideal. What should I run for my setup? Having some rough starts so they're in need of a change anyways.

[speedracer 2002]

Ngk bpr7es

[sayed ali]

Or ngk bcpr7es

[Q5Quint]

You may need to gap them slightly less than stock if you are running a stock coil, otherwise you will get missing sparks at around 8psi.

[ColdAsLife]

NGK BR7ES is sufficient for your target boost. Once you get closer to 18 lbs then usually BR8ES is recommended by most.