Ok i have a few questions about turbos and tuning. 1. What does the a/f ratio and trim size on the turbo and compressor mean? 2. How important is it to tune it on a dyno? And is it as nesccesary to tune if you're using an FMU?? 3. What would i need to do to run 7-9 psi or 10-12 psi on a d16z6??