The cranks are high nickel nodular iron. Besides, I think the one in 484 is a forged stroker. Doesn't matter tho. Who else is building these?
Most of the cranks are cast Arma steel - stronger than forged (or nodular) iron. There are a few nodular early 472 cranks, but the steel cranks are both stronger and more common. There is no such thing as a forged crank for a BB Caddy (stock or aftermarket). The stock cranks are all cast, and the aftermarket cranks are all billet.
The 484 that was in the streamliner and the 484 that was the test engine in Flash both had junkyard 472 cranks (steel, not nodular).
I think these stories about cadillac 500s making 2 to 3000 hp must be with a billet steel crank. I'd never try more then 1250 on the cast crank.
Bloodviking, cad 500 builder
They aren't stories. CadCo has built more than half a dozen multi-1000-HP engines with stock cranks (2 of which were stroked stock 500 cranks, that also didn't fail). There are at least as many in the world that CadCo didn't build (mostly, if not all, built with CadCo parts and advice - though that's kind of a given, since Caddy engines at that level need at least a few parts that nobody else has ever sold). I've never actually seen anyone break a stock crank with power (unless it was stroked wrong). The main reason for using Chromoly cranks, is because CadCo has 4.6" and 4.75" stroke Chromoly cranks on the shelf, more inches make more power (if you have enough airflow to use them), and the chromoly crank stroker kits are actually quite a bit cheaper than stroked stock cranks (in CID gained per dollar spent).
Just adding facts for clarification - both of these comments are reasonable assumptions, but some people will read them as fact, and we don't want new folks getting the wrong idea.
