Haltech hasn't published detailed help for this table yet, so here's the practical picture. Spraying water, or a water and methanol mix, into the intake cools the charge and makes the engine less prone to knock. Tuners often use that extra margin to run a little more ignition timing, or to avoid pulling timing, while the system is flowing. The Ignition Correction sits within the Water Injection Advanced function for that purpose, next to its fuel correction.
How we approach any timing change tied to water injection:
- Make sure the system is really flowing. Any timing you add relies on the water arriving. A blocked nozzle or empty tank takes that margin away, so wire and set up the system carefully (see water injection advanced wiring).
- Add timing in small steps and watch knock detection and dyno results as you go.
- Keep the base map safe without water, so a system failure means lost power, not a damaged engine.
Planning water injection on your build? Book a free consult and we'll talk through the setup.
