Got a turbo or supercharged monster under the hood? Then listen up—your spark plug gap needs some serious attention. Forced induction engines pack crazy cylinder pressure, so a tighter gap is your new BFF. Too wide, and you’ll be cursing misfires as boost climbs. Here’s the cheat sheet: stick to 0.028"–0.032" for 15 PSI or less, and shrink it down to 0.018"–0.022" when you’re pushing higher boost levels.

Bigger gaps mean bigger sparks (cool, right?), but don’t get greedy—go too wide, and your engine will sputter like a grumpy cat. Start wide, then gap down gradually until your ride purrs smoothly. It’s all about finding that sweet spot for max power without the drama!