I've got the 12psi pulley on my S/C... topping out my boost at 10psi.

I've just ordered NGK Iridium BKR9EIX, what kind of gap should i be running at?

 

I am running same setup. I just ordered the brk9's too. I'm gonna gap them at .38 since they are three steps colder and the two step colder plugs they recommended .40 gap. If anyone has better knowledge we are listening.

 

So I installed the NGK BKR9EIX (3 steps colder) and I have them gapped at 0.38.
They come from NGK gapped at about 0.28... no idea why so close from the manufacturer.

Idle is clean and steady
Acceleration is smooth.

I'd say it's an OK gap setting, have to run dyno after dyno to see if adjustment would be needed.... not it!

 

Let me know what you find out please. Getting plugs tomorrow and can't afford another tune right now. I want to go to the track soon.

 

After a few days of driving... the .38" gap is very stable under various driving conditions.

 

Might even want to be a touch closer.....33

 

Really? Hrm, well it will be a competition between changing the gap and playing SWTOR.

I will try and report back ....