i have a bone stock ls motor, a drag 2 kit with 310 injectors and a vortech fmu, and the stock 6 psi spring in the wastgate just ain't gonna cut it, so i am jsut gonna buy a new spring and was wondering what kinda boost can i get out of my ls motor. just you opinions and input is all....

 

it all depends on the turbo size and and how the car is tuned but with the right tuning you can run 12psi on a t3t4oe