When torque management is set up to control engine RPM, the ECU compares actual engine speed to the Engine RPM Target. If the engine runs ahead of that target, for example when the tires start to spin, the ECU reduces torque to pull it back.
Engine RPM control has two tables for that job. The Engine RPM Ignition Correction table pulls timing, and the Engine RPM Percentage Cut table cuts a share of firing events. In general, timing retard is the gentler way to shed torque, while a percentage cut takes torque away more aggressively and is felt and heard more.
How we approach it
- Get the RPM target right first. If the target is wrong, the cut just fights a bad plan.
- Lean on timing retard for small corrections, and add cut carefully where retard alone isn't enough.
- Build up the cut percentage in small steps, and check logs after every pass for how often it acts and how the car reacts.
If you're also controlling driveshaft RPM, see the matching driveshaft RPM percentage cut table. Setting up torque management for the first time? Book a free consultation and we'll help you plan it.
