The tuning is more for adjusting how the engine responds at certain engine loads, power delivery etc.. if more power is made I'll take it. I'm still getting tuned and already have -1sec 0-60 time vs stock tune.
So your CX5 goes 0-60 mph in 7.0 seconds or less purely because of ECM/engine tuning? What was your baseline run and with what device did you use to measure it with? What was the elevation and was it level? Did you test it in both directions and average it out and not just take the best one?
You realize that the European version with 189 ft-lb of torque and 189 HP with a 14-1 compression ratio only makes 4 ft-ib and 5 HP more respectively than your 2.5 Skyactiv with a 13-1 compression ratio and that the European engine needs 93 octane fuel. Most publications specify a 0-60 time in the 7.0-7.5 second time with a lighter Mazda 6 using the more powerful European Skyactiv 2.5 liter gasoline engine.
I hope you're careful Chris because adding more ignition timing on a high compression engine like the Skyactiv 2.5 has got to be pushing the limit of the internal strength of the parts. I'm assuming this but it wouldn't surprise me if Mazda made the internal reciprocating parts of the Skyactiv engine light duty in order to shave/save weight. They're reliable under normal duty but start increasing cylinder pressures beyond what Mazda designed them for and things could start breaking after a few thousand miles. I've seen this happen before with other makes.