your time is pretty good for an auto. You are running closer to a high 18 sec. 1/4 mile. Dont launch by throwing it out of neutral into drive unless you are wanting to buy a new one. Practice launching in a parking lot or empty road by holding down the brake and giving it gas. You want to see how high your revs are when the brakes give. That will be about where you want to launch at. Practice this so you can do it fast because you dont want to burn up your converter. Good luck, let us know how it goes.
2001 sangria zx3, best 1/4 time 15.70 @ 85mph. Now have an 04' Pontiac GTO w/LS1