I have a question about boosting my GSR, is the stock compression okay for boost only about 8-9 psi. I'm just not sure if I should get lower CR pistons to safely boost?

 

Millions of people have done it!!! Just do a compression test and boost that bitch!!! It's all in the tune....

 

Which turbo's are best for only about 250-275whp on a B18C1, I think a T3/T4 is a bit too big. Any smaller that still use the t3/t4 style flange for the DP?

 

People use anything from a small t3 to a holset.. Depending on the person..

 

Go .57 trim T3/T04E with .63 AR stage 3 turbine.

 

Thats the turbo im runningas of now... Just watch what turbo you buy. theres alot of fakes and poorly made turbos out there..

 

 

I want something that's internally wastegated.

 

You can get internal wastegate adapters for the Ford style housings used on the "aftermarket" Garretts from Fords.

 

I ran a .57 trim T3/To4E with .48 AR stage 2 turbine on a B18B1 and LOVED it. Spooled super quick and i never had a problem with it dying out up high. I really liked the midrange powerband and part throttle boost.