TUNEDBYAB
ROLLING ALS · DEVELOPMENT

ME7.5 Rolling Anti-Lag built as a captured RPM target, not a blind cut.

TunedByAB Rolling ALS is still in development and is not currently sold. The current 032HS design captures the engine speed where the driver deliberately holds the spring-loaded cruise RES/+ input, then uses per-map late ignition and staged REDSOL intervention to control RPM while building exhaust energy and boost.

Join the Rolling ALS waitlistCurrent released products
Trigger targetHold RES/+
ControlCaptured RPM + REDSOL 0–4
IgnitionDedicated ALS KFZW/KFZW2 per map

Step 1: capture the rolling RPM target

The driver reaches the desired engine speed in the selected gear and deliberately holds RES/+. The current development branch captures that RPM and retains it as the reference until the trigger is released or a safety path aborts the strategy. This is different from a fixed launch-style limiter because the target is chosen from the actual rolling condition.

Step 2: use dedicated late-ignition tables

When the activation gates are satisfied, Rolling ALS selects a dedicated KFZW/KFZW2 pair for the active multimap profile. There are five ALS ignition pairs in the design, allowing each normal map to have its own Rolling ALS ignition calibration rather than forcing every profile through one global timing table.

Step 3: REDSOL stages 0 through 4

REDSOL is used as a selective cylinder-reduction request. Each map has an editable capture/hold curve that responds to RPM above the captured target. Stage 0 requests no additional cylinder reduction; stages 1 through 4 progressively request at least that number of cylinders reduced. Hysteresis is included so the selected stage does not chatter when RPM sits near a boundary.

The custom request is also bounded by a per-map maximum. The design compares the ALS request with the factory REDSOL request so Rolling ALS does not weaken a stronger OEM intervention that is already active.

RPM and gear aggression

The development architecture includes modifiers that can soften, leave neutral, or add one REDSOL stage based on the captured RPM region and selected gear. That gives calibration control over how aggressively the strategy reacts without replacing the underlying per-map REDSOL curve.

Safety paths are part of the design

Current logic includes clutch and brake handling, engine-speed and vehicle-speed windows, minimum pedal, coolant-temperature gating, modeled EGT protection, maximum target overshoot and optional pressure/boost guards. A safety abort can latch Rolling ALS off until RES/+ is released, which prevents a map-change or abort event from immediately flowing back into ALS operation.

Coming soon, not for sale: static logic validation is not enough for a feature that deliberately changes combustion and turbine energy. Runtime validation of cruise input behavior, REDSOL response, safety gates, temperature behavior and pressure scaling is required before TunedByAB enables customer sales.

Why the waitlist exists

The waitlist gives interested ME7.5 owners a way to hear about the release without turning an unfinished development build into a product. You can optionally include your ECU/software string so demand for different revisions is visible while the feature is being validated.