Test and Tune Nite help

Many street cars underperform by ignition timing alone. Too many people have their timing set and let it run. A guy at our local dragway had a challenger with a 383 auto. He ran a high 15. We advanced the timing (bump the dist up) and the car went 14.9's the very next run. So many people leave E.T.'s all over by not tuning, testing, tweaking. I advise when messing with timing, go one way or the other by 3-5 degrees and see how the car responds. Goes faster, bump it another couple of degrees. etc