What it does
Cylinder Correction adds a separate ignition trim table for each cylinder, in degrees. The main ignition table still sets the overall timing; these tables let you nudge individual cylinders up or down from it. Each table can be mapped in up to three dimensions, so a trim can change with RPM and load rather than being a single fixed number. It's off by default.
What it needs
The option only appears when your trigger setup supports full 720° engine synchronization and per-cylinder control. In plain terms, the ECU has to know exactly which cylinder is firing, which usually means a working cam (home) signal alongside the crank trigger. On a wasted-spark or distributor setup without full sync, it won't be available.
When we use it
- A cylinder that consistently knocks first, often because it runs hotter or leaner than the rest.
- Engines with uneven intake runners or cooling, where some cylinders are more knock-prone.
- Fine tuning with individual EGTs, where one cylinder is clearly out of step.
Start with small adjustments, confirm the result with knock detection or EGT logs, and fix mechanical causes first. For the other trims that stack on top of your base table, see ignition corrections, including air temp and coolant temp corrections.
