[Shane@DBPerformance]

Tom, running 20psi with no FMIC on a turbo that puts out blazing hot isn't the best thing. You really have no idea if it's knocking or not. Not hitting fuel cut means absolutely nothing. Fuel cut doesn't save your motor from knock, detonation, running too lean, blowing up, damage, or just about anything at all.

Contrary to what a lot of these guys are saying, you can probably run the 680cc injectors with your turbo and an AFC and have the car idle and run okay. They are however, much larger than what you need. Running big injectors does not mean you can run more boost safely or anything. Usually you want the closest injector size suited to the power you are going to make. 450s are good to about 300whp, 550s are good to about 400whp. You will have a better chance of getting a good tune out of smaller injectors. More importantly, I wouldn't even bother running to high of boost or getting it tuned until you a FMIC. It's probably knocking like crazy if you are running high boost with no FMIC on the shit ass gas they have out there.