2013 Iron 883 hi flow ac

Been running the fuel Pak with Vance and Hines short shots. After numerous attempts could not get the 1/4 throttle flat spot fixed. Later I removed the baffles and used the Fuel Pak settings per VH. Spent weeks trying to get it to run right and still had the flat spot. So out of the blue I used FP-4939 settings. This is used for side shots standard baffle. It worked like a champ. Throttle is smooth through the RPM range with no hesitation. So if you have the same issue I did give it a try. And yes I'm saving for a better tuner.