I read once, way back in the 70s I suppose, that to optimize a turbo you needed to run something like 7 to 1 compression and 12-14 psi boost. Maybe I remembered wrong, does that sound right? Would one good dual stage turbo be better? I was thinking twin small ones to help eliminate spool up time and lag.
I'm not talking about a competition engine, just a daily driver pickup that has enough power on tap to pull good when needed.