The short answer is no. A few years back, I was involved in some testing that involved motor research. The lab I was involved with, was staffed with a handful of engineers and researchers, one formerly worked as a tribologist and manufacturing engineer for several large auto makers, Ford being one of them and was also involved with other various engine manufacturing plants.
On occasion we would go to lunch together. I talked with him at length about casting processes and I learned a bit from him. I asked him the same question that a lot of folks on the internet have, regarding material changes being selectively added or deleted from various casting processes. He said the cost of continually changing material composition to suit small changes in a production environment would be absurd, cost prohibitive and highly unnecessary, adding to delays in production and set-up. He was also very clear about foundry work being a constantly evolving process. It is.
Someone on the internet, quite a few years back, began propagating the rumor, that turbo blocks were built in a special production facility, which supposedly was able to re-fine the crystalline structure of their iron “at will” with the further addition of nickel and a lower balance of silica. These turned out to be nothing more than rumors, likely propagated by people wanting to artificially stimulate prices or something of that nature. It is a rumor that has persisted ever since, despite many efforts to bring the truth forward. In general, newer castings are usually much better, as all sorts of technologies and control measures have been added over the years, to the process of iron casting. Subsequently manufactures have been able to keep vehicle weights in balance with ever increasing items added to vehicles.
The questions that people should be asking are;
What are the areas I need to be concerned with and why?
What is an engine block truss or girdle and where can I get one?
Why should I be concerned with crankshaft flex?
What did Jack Roush and Dan Esslinger do to the center main bearings, to keep them from failing in their Trans Am racing engines?
TVS Supercharged SVO 2.7L
561 ft lb