well if its white smoke it could be a blown headgasket, or could be a blown turbo, i had both these things go out and i had white smoke commin out as well in my 98 gsx. or if its not to much smoke it could be oil in ur intercooler pipes and it could be gettin sucked into ur turbo. does the smoke come out only when u build boost? is there more smoke when ur in higher gears? sounds like this might be ur problem. talk to the BROTHERS on here and they run some good rates to do this shit. and im sure someone has a used turbo lying around they could sell to u if thats the problem. idk my .02