I like to know if there's is a wise way to upgrade my 4D56 Turbo Intercooler (100 hp/245 Nm) engine ? If the answer is yes here's the questions about what kind of modifications should I take to get the significant - reliable result :
1. Upgrade the stock (Garrett TD04) turbo charger with a bigger one ? If yes I need the type of the bigger turbo that recommended for 4D56; or/and
2. Porting & Polish the valve, cylinder; or/and
3. Upgrade the exhaust; or/and
4. Install Water Methanol Injection (Snow Performance); or/and
5. Can I change the head with Common Rail DI-D ?
6. My 4D56T came with mechanical injection, can it change with electronic injection so I can use Dastek unichip ?

Thanks for the advice guys, I really need it.... <img src="/forums/images/graemlins/cheers.gif" alt="" />