Lately we have really been doing a deep Dive into these INDIAN Chiefs, the Engineers at Indian certainly like to do things differently to the Engineers at Harley Davidson (we are more experienced with their work).
The way they have set up the ECU Strategies for the INDIAN Chiefs took some development time to get to grips with but once you've got your head around it they do become quite satisfying to tune.

The Common problem with both Harleys and Indians is that they are V-Twin Engines with a shared Intake Manifold. The issue with this from a tuning stand point is that both cylinders do not receive the same airflow, therefore the will have different Fuel Requirements.
Hence why we tune both cylinders individually on a V-Twin Engine and this is also how we're able to get our tunes to be so smooth and crisp to quick throttle movement.

One of the other areas we are able to make great improvements with these INDIAN's is in the Torque Control Mapping. The Factory Engineers have set up Calculated Torque Mapping based on the Engine Size, Throttle Position, Volumetric Efficiency and More.. but when you change your Intake, Exhaust or Camshaft you are changing some of these data points. What this means is that without adjusting the Maximum Torque Output Tables within the ECU the bike will maintain the factory torque limits by closing the throttle blade.
In the dyno graph shown (on the right) you can see the effects adjusting these torque limits from 4500rpm to 5300rpm. making nearly 20Hp difference when compared to STOCK.