OH~! but I love NA haha:X-: ..I can give some suggest la ..like if convert H22A ..the power sould b moer than F22B ..but F22B is more lighter than H22A so u can get the more nice front n rear weight ratio... If say turbo..I think need to spent lot money on it to mainten... the 1st trouble is the Heat ~~! N need to mod the piston, con rod, crank shaft, injector, extractor, piping, fuel pump, ECU tuning..n a lots of stuff...but if really add in turbo..the 1st thing I suggest to do is mod the engine block..make it more strength..if u mode piston all that but no mod on the block ..finally will get engine blown too ..so consider la :_: