Forged pistons for high loads

What has long been common in motor racing is increasingly being used in series-produced engines subject to high stresses: forged pistons. These have a finer micro structure than cast pistons with the same alloys. The production process results in greater strength in the lower temperature range. A further advantage is the opportunity for producing lower wall thicknesses—and hence reducing the weight. Boring or milling internal areas of the piston also helps reduce the weight.