This is from the AER website:
"MAZDA MZR-R (AER P70)
The all new Mazda MZR-R engine introduced in 2010
represents the state of the art in Turbocharged engine technology. Combining very low mass with a small physical Footprint and
unparallel efficiency the MZR-R is the choice for modern high performance Motorsports."
So much for using any weight or internal specs from the previous incarnations of the MZR-R. The intake plenum was "all new", no telling what else is.
I was looking up the AER P32T twin turbo V8, to see just how "not so much engineering" would be required to morph it into an IndyCar V6.
Not much to see, since about the only bits you could use are maybe the connecting rods,front cover and dry sump pump. New engineering would also include direct injection and possibly changing the compression ratio to make more efficient power production on E100 and at higher boost pressures.
That's a complete clean sheet of paper design. Just like the engines nobody else is building, with the exception of Honda.
Good article from Racecar engineering about the engine, though:
http://www.racecar-engineering.com/a...r-p32t-v8.html