How the table works
The Launch Control Ignition Advance table is an 8x8, 3D table. Whenever launch control is active, it takes over completely as the ignition base table. Two things matter:
- The values are real timing, not a trim. If a cell says 10, the engine runs 10 degrees, not the base map plus or minus 10.
- It only applies during launch. As soon as launch control switches off, your normal ignition map is back in charge.
How we shape it
Think of the table in two zones.
- Away from the launch point: fill these cells with timing close to what your base map runs, so the engine revs cleanly up to the launch rpm.
- At your launch rpm and load: use retarded timing. Late ignition means the charge is still burning as the exhaust valve opens, so energy goes into the exhaust as heat and pressure instead of into the crank. That spools the turbo while the engine makes little actual power, which is exactly what you want while you're stationary.
Start with modest retard and add more only while watching exhaust temperatures and boost in your logs. Heavy retard builds boost quickly, but it's hard on exhaust valves, manifolds and turbos, so don't hold it longer than you have to.
Related: End RPM, Fuel Correction, Launch Control Wiring and how launch control works.
