Well, you could also get a dyno done with an AFR gauge reading, to see as well. As that is a cheaper option to determine how rich it is. However, that will only let you finally know, and let you know what a possible next step could be. If your tune is making your engine run day in the 9's AFR's, then you can expect to gain a good deal of power. Moving it up to the 11's. You'll never know without some that data aquisition though. Or.....be acceptant and live in happy ignorant bliss. That isn't the case because you have for years had this annoyance for making you question why.