Mahle Steel Diesel Pistons

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.

Mahle steel diesel pistons.

That means engine builders may not need extra clearance required with an aluminum piston. Forged diesel pistons are best suited for dedicated drag and pulling vehicles. The special laser welding process used allows for a kidney shaped cross section of the piston gallery. The diesel racing engines were equipped with steel pistons from mahle just like today s engines.

And with good reason. Since the pistons are of a similar material as the cylinder both have similar growth characteristics. 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. Strength and design flexibility still make the performance forged piston a favorite for competition.

Steel pistons are not only stronger but also consume less fuel than aluminum pistons. Mahle motorsports in general will run tighter tolerances than our competition. So eroding isn t an issue with these steel parts. New development from mahle allows steel pistons to be used in powerful passenger car engines.

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. 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.