The word hypereutectic gets its name from the aluminum alloy used during the manufacturing process. What this means is that an over-stressed cast piston can fail more quickly.Īn option that many consider slightly better for performance applications than cast pistons are hypereutectics. Ductility is a solid material's ability to deform under tensile stress. The major drawback to running cast pistons is that the cast aluminum is limited in its ductility. This enables long ring-land and skirt life, as well as the ability to retain tighter side wall-clearances for quiet operation. Cast pistons also offer excellent wear and thermal characteristics. This near net shape minimizes the overall finish-machining that is required, reducing its cost. Cast tooling is generally designed to produce a near net casting. Casting a piston has a few advantages over forging when manufacturing. During the casting process, the melted aluminum alloy is poured into a mold that when cooled after filling, results in a piston-like "blank" being made. A cast piston is built just like it's named. We've all heard these nomenclatures applied to pistons, but what does it mean-what's the difference? The difference is found in the way that the piston is actually made. IC9964 replaces IC9928.The two most popular ways that a piston is manufactured, either results in a cast or forged piston. Advertised piston weight 450 grams, 132 gram wrist pin.Wrist pins and spiral lock rings 1/16 x 1/16 x 3/16.Accumulator groove to help eliminate flutter and maximize ring seal.Skirts machined by UEM's unique in house built cnc machines.
Mini grooves allow an overheated pistons to transfer heat to the wall.In addition, the use of 4032 aluminum decreases the friction created during engine operation, this results in extended piston life and reduced wear. FHR pistons are 11% silicon which means they can be installed with tighter piston to wall clearance. This gives engine builders the flexibility to machine the dome to their desired compression ratio. Many of the FHR dome pistons feature a solid dome. FHR pistons have valve reliefs that are formed into the piston as the forging blank is pressed into the die. Icon's FHR (Formed Head Relief) pistons deliver quality on a budget.
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