I am currently wokring on a b18b lsvtec and was wondering how to figure what kind of turbo i need. I know a gt35r but what trim and a/r do i need to get. my goal is 600hp and am not sure of how to figure out what trim and a/r i need. the motor will have an 84mm bore if that helps.
Thanks for the help

 

Start looking at other turbos besides the GT35R for that power, you don't need to run it at its maximum to do that. Also try to read and research about turbochargers a bit more.