Mahle Steel Diesel Pistons

Forged diesel pistons are best suited for dedicated drag and pulling vehicles.

Mahle steel diesel pistons.

The diesel racing engines were equipped with steel pistons from mahle just like today s engines. And with good reason. Mahle motorsports in general will run tighter tolerances than our competition. New development from mahle allows steel pistons to be used in powerful passenger car engines.

Strength and design flexibility still make the performance forged piston a favorite for competition. The powerpak pistons are made from either 4032 aluminum alloy to allow for tighter cylinder to wall clearances and improved temperature stability or 2618 alloy to allow for increased detonation resistance. This advantage makes steel pistons viable even for engines with lower stresses. Although the performance forged pistons are stronger the lack of a steel top ring groove in the forging will result in a limited lifecycle for street applications.

Stuttgart february 04 2019 a new production process from mahle with maximum design freedom for the piston gallery permits the way for the use of steel pistons in powerful passenger car diesel engines. Injection pressures of up to 2 200 bar mean pressures of up to 31 bar peak pressures of up to 210 bar specific power output of up to 100 kw per liter and ever lower exhaust gas emissions these are the current requirements for modern passenger car diesel engines. The special laser welding process used allows for a kidney shaped cross section of the piston gallery. So eroding isn t an issue with these steel parts.

A new production process from mahle with maximum design freedom for the piston gallery permits the way for the use of steel pistons in powerful passenger car diesel engines. The mahle motorsportpowerpak kit is our high volume shelf stock program developed for high performance enthusiasts and sportsman class racers. Since the pistons are of a similar material as the cylinder both have similar growth characteristics.