[Turbo99]

Aluminum-intensive construction extends to the pistons, which are manufactured as cast aluminum polymer coated oil cooled pistons, with a fully floating wristpin, and these pistons are considerably lighter than conventional pistons. Less weight means less reciprocating mass in the engine, which in turn means less inertia and greater operating efficiency. Moreover, the V-6 VVT pistons are crafted with a number of features that enhance durability and reduce noise and harshness, including a high-tech polymer coating and floating wrist pins. The V-6 VVT engine family was developed with pressure-actuated oil squirters in all applications. Three jet assemblies in the block hold a pair of oil-squirting nozzles that drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, which in turn allows the engine to produce more power without reducing long-term durability. The extra layer of oil on the cylinder walls and wristpin further dampens noise emanating from the pistons.


I think the bold will be your down fall. Cast will fail on an extended run of boost. Maybe not the first time but it will kill the ring landings.