Go to your local drag strip and datalog your runs, make small changes until acceleration rate stops increasing, racers been doing it for years way before dyno was invented and it still works.
Local drag strip is like 300 miles round trip, lol. Forget that.
I have an active tune on top of a flash. I don't think I can save my trims from the active tune logging because my flash is locked. Tried once, and it didn't pull up any data. Maybe did something wrong in the order that I did things, very possible.
I'm considering playing around with an unrestricted and unlocked map, and then street tune it. Pain in the ass for sure, but I think my current locked flash has more done to it then just fueling, and I have no idea how to properly tune, so I would just let the active tune get my fueling down to target AFR.
There is a chance I might go to a dyno, but I have so much other things I would rather spend money on.