Here is a shot of the PE vs Time table from my GTP. There is one table for base at 12.4, then another table lowers it as a function of time and RPM. You can see how easy it would be to get into the 10.X range on a 1/4 mile run.
08 Silverado - No times yet.
99Z28 - email@example.com. 403 with street tires and launching with the traction control.