Overview
- BMW M, which announced the motorsport‑derived “Ignite” system Thursday, set M3 and M4 production for July 2026 and the M2 for August.
- The setup adds a small pre‑chamber in the cylinder head with its own spark plug and coil that shoots flame through tiny openings at near the speed of sound to light the main charge.
- At lower revs the conventional plug fires first, but at higher revs and loads the pre‑chamber leads to speed up combustion, cut exhaust temperatures, and resist knocking.
- BMW says the gains show up most on track, letting drivers run longer on the same fuel load, while displacement and quoted power for the S58 stay unchanged.
- The engine also gets a higher compression ratio and variable‑geometry turbochargers, and BMW’s 2024‑patented approach echoes pre‑chamber ideas seen in racing, Maserati’s Nettuno V6, and earlier CVCC concepts.