You might want to try 38* early like 2200rpm. Did you run it w/ or w/o an air filter? Depending on the elemnet you might pick up a tenth or 2 w/o it. I also think 15lbs for drag radials is low. That might be causing the tire to "cup" Radials don't act like the old bias plys, try a few more lbs of air. I run my hoosier drag radials at 17 (still a WIP) I'd think your car should be in the 1.60 range or better. Don't worry about your "light" just work on your launch and shift points.