Why add or remove axis points?
Axis points are the breakpoints of a table: the RPM columns and load rows the ECU interpolates between. Put them where the engine changes behavior and your tune gets more precise. Common reasons to add one are a sharp torque change around where a turbo comes on boost, or a resonance point in the RPM range. Common reasons to delete one are a crowded region where cells barely differ, or freeing up room so you can add a point somewhere more useful.
Adding a point with Ins
- Select the table and press Ins.
- In the dialog, choose whether you're adding a row or a column and type the axis value you want.
- Confirm. The new row or column appears in the right place, and its cells are filled by interpolating between the neighbors on either side.
Because the new cells are interpolated, adding a point doesn't change how the engine runs at that moment. It only gives you a new place to tune. Check the new cells in your logs and adjust them once you have data.
Every table has a maximum number of axis points. When you've hit it, the insert and delete icons turn gray, and you'll need to remove a point before you can add another.
Removing a point with Del
Select a cell in the row or column you want gone and press Del. The dialog asks whether to delete the selected row(s) or column(s). After deleting, the ECU interpolates straight across the gap, so look at the surrounding cells and make sure the transition still makes sense.
The Axes Setup page (F3)
For anything beyond a single point, press F3 to open Axes Setup. It lets you:
- Edit many row and column breakpoints at once, just like editing table cells
- Insert and delete axis points
- Change which ECU channel drives each axis
- Turn individual axes on or off
- Save and load axis channels and breakpoints
The page also shows the Maximum Length, which is how many points that axis can hold.
Saving an axis layout you like makes it easy to apply the same breakpoints to related tables, so your fuel and ignition maps line up cell for cell.
Related table skills
See modifying tuning tables, selecting tuning tables and the copy through feature for the rest of the table editing toolkit.
