Height Ignition Correction is one of the tables in the Nexus torque management function. As the name says, it applies an ignition correction based on ride height. In practice that means wheelie control: when the front of the car climbs, the ECU can take ignition away to bring it back down, then restore it once the car settles. An uncontrolled wheelie costs time and can damage the suspension or chassis, so this is worth getting right on a hard-launching car.
The ECU needs a height input for the table to do anything, and a laser ride height sensor at the front of the car is the usual choice. See ride height sensors for setting up the input, and our wheelie control article for where to mount it.
Haltech hasn't published detailed help for this table on Nexus yet, so confirm the axis options and units in NSP on your firmware before you build it.
Our starting point is conservative: small corrections first, the height channel and the correction logged on every pass, and more added only where the car still lifts too far. Related tables worth reading: timed ignition correction.
