definitely bought the wrong car but if you feel very attached to it and feel the need to do this ... cheapest way is a remote mount turbo system as there is a crap load of room in the muffler area and plenty of space in the hatch for a nice water injection system and a separate oil pump and tank for the turbo (its the better way to do this Vs. running it off the engines oil system) ... extra injector with a megasquirt or greddy emanage to run it tapped off the stock fuel rail schrader valve (the valve thread is 4 AN, use a schrader valve removal tool to make it a open line) ...

then just keep that water tank full and run low boost on a nicely sized turbo to hit those high numbers ... run out of water, say bye to motor ... unless you lower compression or retard the timing.