give me the advantages and disadvantages

 

most of the turbos that are internally wastegated are small......for instance my 18g....i would def recommend a externally wategated turbo if i was you......but that also depends on the amount of horsepower you are trying to make.....

how much are you trying for.....i've done a lot of searching a lot of people like the gt 28.....bb and spools fast as hell external and probably just what you are looking for......