I've always shifted at 5800-6000

My car ran 13.45@102 three years ago with only a O/R X and welded in Flowmasters, a shifter and drop-in K&N......nothing else......that's even OEM Gatorbacks. A year later it ran 12.89@104 on drag radials and a few more mods...still shifting at 5800-600. Works good for me:banana:
Jay