he is new. only 2 posts.
always search, there are threads in here that are already jam packed with useful info.
codyace did this build thread and its all you need.
zerothread?id=213470
for an SR20 the best bet is the Garrett gt2871r .64 or .86.garrett t3/t4 and gt30 are also good.
go to garrett's website and read their turbo 101 basics article. then you'll learn about trim, A/R and what turbos work best with what motor.
you'll also need bigger fuel injectors, better cams, and an ecu. research research research. it costs dough.