Also, you're not going to fine a well performing aftermarket turbo that spools as well as a stocker. You're always going to have a little more lag than stock but when it hits, hang on for the ride. I'm running an HTT Promax and when I'm fueling hard it will break the tires loose when the turbo finally spools.

 

When is spools is the issue. The only real way to solve that is a fancy VVT or a set of twins where by you can deal with both the low end and the highs with the applicable air flow.

Having a medium sized single will result in exactly what you have experienced. A large single is even worse / better (depending on your view). Smaller and your fueling and boost will be problematic but a combo, watch out.

 

Yep, I've experimented with 3 different turbos and sometimes I wish I would just put my VVT back on but I've got something up my sleeve so the Promax stays on.

 

yup I wish for my stocker back on sometimes also. Those over and under boost codes and limp mode get old quick