they did turbo the k series... you dont need all that crap.. evo has proven that with a 400 ish hp 1.4 running std internals and minimal head work.
read 16v mini forums. and rovertec.
Its a load of S***
i did a big more digging into it and they did a turbo BUT! and i will SAY BUT!! it was Built by lotus/ Caterham and it was a 1.8 Turbo
the 16v mini may have a standered 1.4 turbo but its not a proper turbo k series and the standered engine wasnt designed to take a turbo