As luck would have it. My Mistral pipe and Mistral "spoofer" were delivered today. Of course, I immediately put the pipe on, which added about a bazillion mental horsepower, because is sounds glorious. Took it for a quick spin and could definitely feel the difference (but that could due to the mental HP). It popped on deceleration, and was a little more shaky at idle. Then I plugged in the "spoofer" and took it for the same little spin. Popping was far less, but not gone, and the idle was improved.
I did some "post-purchase" research and it seems the "Beetle" maps are the way to go. So I will try GuzziDiag at some point soon. FWIW, I figured I could trust Mistral to sell a viable plug-and-play solution with their pipe. If the Beetle map is better, than I invested a little money in first-hand experience.
Like the saying goes: "In my life I spent a lot of money on beer and motorcycles. The rest, I just wasted."
So... to keep this on point for this topic... Doesn't the electronic engine management have a lot to do with getting the most power out of an engine? I mean, if Harley is actually trying for low-end torque, I assume they would also optimize the ECU for that - vs a midrange motor.