So this is kind of a dead thread. Even though the AP is still not out. The question is valid. I do not know the answer. But to be honest I used to gap my plugs on my boosted S2000 with a steak knife. ha. They would last a week and then I would try another gap size. But get ahold of Bap Geon or your local dealership. Google em or something. Either should be able to tell you the stock gap and the plug temp for the stock plug. I would start with one stage colder. Then start adjusting the gap smaller and smaller until you start to hear knock. Then go wider. Its irrespsonsible at best, hahaha. But thats how you learn I guess. As for will it be beneficial. No, if you are trying to squeeze five HP out of your car with the AP, then dont chance your engine with Plugs. Once you up the boost a decent amount and get a better fuel system then you should start playing with the plugs. But colder plugs will foul out quicker in daily stop and go traffic. Just some points to think about.
