The problem has been when adding FI or changing charging systems. There have been countless people/companies that have tried turbo systems, twin charged systems, etc, but they just haven't been very successful. Some have made it work, but they are one off systems that are almost impossible to duplicate and/or cost a fortune. And most of them have never really gotten it to run consistently.

The one thing that has seemed to work is actually swapping engines and engine management systems. Instead of looking to change the charging system, I would look to swap motors. You say, "whoooooooaaaaaaaaa, talk about expensive!!!!" Wrong. I would bet that you could actually do it cheaper. You can find an engine from a salvaged vehicle that is very cheap, in near perfect condition, with very low mileage. I would bet the SLK55 engine would fit in the Crossfire bay with few modifications. This engine could easily make 450 to 500hp.