Here's another example of dyno-tuning. This time with European 250 which is fuel-injected. This allows for much, much easier, faster and more precise adjustments at dyno-shop. You just adjust 3D maps on factory ECU in 30-seconds with couple clicks of mouse instead of spending half an hour pulling carbs, swapping jets, needles, needle shims, adjusting pilot screws and putting carbs back in. Imagine doing that 10x in a row in single day! On certain turbo cars, I've done as many as 30 dyno-runs in day to dial them in at multiple boost levels.
You also have much more precision with smaller adjustments with EFI. Factory ECU maps aren't bad but still too rich from factory. Besides leaning out mixtures for more power, you can also optimise mixture flat across entire RPM-range for maximum-power at 13.5:1 AFR. With zero physical mods at all, it's possible to get +15% increase in power from just fine-tuning ECU maps alone!
