I have a 01 Teg Ls. I have an intake, bbk throttle body, skunk2 intake manifold and dc headers. Yet when i went to the track i ran a 16.8. Why??!!! Can some one give me advice?? I also have nos in the car but i'm concerned about the without nos time. Please help Here is my time
R/T -.392
60'- 2.467
330 -7.024
1/8- 10.789
1000- 14.097
1/4- 16.8 @ 82.72

i thought the best r/t is .5 anything faster than that you red light

The mods you have really aren't going to do a whole lot for you. Unless you have your head re-worked the extra air that the throttle body and the intake manifold flow is useless. It's like upgrading the fuel system of a stock motor, it doesn't make power on its own it is a supporting mod. 16's are about right for a mostly stock ls. If you work on your driving ability you could bring the times down a little. I ran 15.8 with my ls when it had just i/e/h.

you want better times? put the oem TB back on and get some Micky Slicks.