Where it fits
Torque management on a Nexus can compare engine speed to an Engine RPM Target. When the engine gets ahead of that target, usually because the tires have broken loose, the ECU takes power away until it's back on track.
The Engine RPM Ignition Correction table is the timing side of that response. Pulling ignition timing reduces torque smoothly, without the harsh feel of cutting cylinders. Its companion, the Engine RPM Percentage Cut, removes power by cutting instead, which is more aggressive.
How we approach it
Haltech hasn't published detailed help text for this table yet, so check its axes in your version of NSP before tuning.
- Get the RPM target right first, from logs of runs that hooked up well.
- Start with small timing corrections and increase them only where the car still spins.
- Watch exhaust temperature. Heavy retard sends heat into the exhaust and turbo.
- Log engine RPM, target and the applied correction together after every pass.
Using a driveshaft speed sensor instead? The driveshaft RPM ignition correction works the same way. Setting up torque management for the first time? Book a free consultation.
