this will be raced once a month prolly. But most part street car, but i want unlimited horsepower. I want to build around the turbo. LS motor w/ manley rods arias 9.6:1 c/r pistons, stock bore and a T04- 60-1 turbo, what will the spool times be like vs. the hybrid turbo, and what is the difference when they both ahve full boost. What are the power differnces in the turbo and at different psi's...say for instance both turbo on 12psi on a stock ls motor wit my set-up 9.6:1 pistons and manley rods. how much more powerr will the t4 make over the hybrid at 12psi and high boost such as 20+psi

 

Go with the T3/60-1. The T4 hot side will give too much lag on the lower red line of the LS engine. I know guys making 500whp and some more with a T3 hot side.

 

t3/t4 for only 12 psi , a straight t4 is overkill for your set up.