well need some serious mods to beat twin cam 16v engine car

 

There are many tried and trusted methods, indianwarrior
Whats your poison..? N\A or forced induction are th simplest....increased capacity is possible, but th gains arent as easy as Boost!
Nissan SR20 engine TB will fit, ranges from 55 to 60mm, stock GTi was 52mm
Suzisport was 55mm, Injectors are easily fitted, Supra and a myriad of other models will fit the company Suzitech can help with modifying ur factory parts for more performance..or are you o\seas? (I`m refering to Australia)
I can refer you, or offer what I know....but I need more info....

 

Erm, i think you`ll find the stock TB for the GTi is 45mm. 52mm is way too big for a 1300cc. The uprated Nissan Throttle bodies you can acquire from people like suzitech are 50mm, thats plenty big enough unless you want to go to the expense of uprating the fuel injectors and boreing out your engine.

Sam

 

Nitrous....... that's all.