450 doesn't sound too unreasonable for an Evo III 16g. A Schwitzer S200 would put me dead into the 400-500 hp range, but then again that is where it is designed to operate. And can you say lag? Although, technically, this isn't really a 16g, since I'm using the TN external wastegate, whereas the 16g's utilize internally gated turbos. Yes, the turbo shown has the wastegate actuator, but I'm lopping it off when I get the cast piece finished. Also, look at the size of the thing, it's wee bit bigger, it almost spans the block!
Uh oh... which makes me wonder: will the alternator and P/S pump fit now? Hmmm, must go look...
Here we are talking about pump ponies out of a chunk of plastic...