The manifold_efficiency_table is important when tuning a piston engine. Unfortunately Manifold Efficiency is not included in the Engine debugger. The engine_mechanical_efficiency_table and engine_friction_table can both be edited in the AE as well as other pertinent engine tuning tables. Please include this missing parameter (Manifold Efficiency) in the AE Engine debug window.
I use the AE extensively I just don't save and resync. I edit my CFG, save it in my external editor, resync using the AE, and confirm my change within the AE. You can't use that process with Manifold Efficiency as it is not included in the debugger.