I switched back to e30 today and tweaked the tune a bit. I was able to hit 20psi of actual boost and a max of 15.5lbs of airflow. It averaged around 10-12* of timing at WOT so I'm pretty happy with it. I don't think I'm going to get much more performance out of it without more upgrades I don't want to pay for(downpipe, exhaust, intercooler, better intake). Overall it rips for a basically stock car. Only mods are the secondary intake tube and turbo hard pipe, and a cut up air box.