I was looking at the entry level kit made by Trick Turbo and noticed it makes 400-500 hp. I wondered why there was a 100 hp range and what it took to make the 500ish hp. I have an aem water/methanol kit already and was planning on installing that after the turbo kit was done, it's just a single nozzle so nothing too crazy.

 

The amount of boost you run determines the power level.

 

Size of the engine will play a roll too. A 4.8 won't make what a stock 6.0 does with boost.

 

check my build threads. youll be fine with the stage 2 kit.

 

i'm sure an entry level kit will be fine for me until I get the urge to turn up the boost. Truck is a 2002 with a cam and a 5.3 and flex fuel injectors.

 

Like others have mentioned.
The engine size, boost level, cam shaft, tuning are just a few that effect final hp numbers.