TIL my old tuner was basically just turning up the boost and calling it a day
For years, I'd just slap on a bigger turbo and let a local shop do a generic 'stage 2' tune on my 2015 3.5 EcoBoost. It felt fast, but the transmission shifts were harsh and I'd get weird knock readings on hot days. Last month, I finally paid for a custom dyno tune from a specialist in Dallas, and the difference is insane. They spent 4 hours adjusting timing, fuel curves, and shift points individually. Who else has found that a custom tune was the real key, not just the parts?