Over the years, I have torn apart and assembled hundreds's of engines, many of them were 2.3's. I have seen my fair share of distorted or broken piston skirts and ring lands on 2.3L motors. Usually the customer complaints are "Rod knock coming from the engine" which almost invariably is caused by piston skirts or broken ring lands.
We engineers tend to think of things in our own terms, no wonder we make people crazy. When we look at the statistics on aluminum castings, one of the more important numbers we should take into account are the "Minimum tensile strengths" for a material, which gives us some kind of idea of how much a part can take before it breaks. This is a science, based of facts, not internet conjecture.
Cast pistons in general have about a third of the tensile strength of a Hyper-eutectic piston and about 1/8 of the tensile strength of a forged piston. Simply put, they will yield at a much lower value than a forged piston.
Aluminum, unlike steel has a very limited fatigue life, meaning that it will only resist failure through a limited number of cycles before permanently deforming, or failing. It is just a matter of time until the guys on 4m.net blow their engines sky high.
Can you rev a stock motor to 8,000? Of course you can, but for how long?
For such a small amount of $$ you can ensure the engine runs effectively for the long haul, by purchasing a set of Keith Black hyper-eutectic pistons for a $150.00 and a set of ARP rod bolts as a minimum.
All of that aside, is your stock engine really making its peak HP at 8,000 RPM?
I would be interested in seeing the dyno results.
For an endurance racer with a stock bottom end at 7,000 RPM, I will stick my neck out and say you will last 3-4 hours, before piston failure occurs. Remember load increases by the square of the speed
TVS Supercharged SVO 2.7L
561 ft lb