Spark plug gap

On older MSDs like 6A, the engine would stutter on the limiter. The Digital 6 wont do that, the engine runs smooth on the limit. When I stage on the 2 Step, its smooth. That's why you wont notice as easy when you hit limiter at high limit. But it showed on the chassis dyno though. Lost 41HP from 5700 to 5800, but rev limit was set to 6200. The motor wouldnt rev above 5800 at all.