Originally Posted by Illegal Machine
If his best time in a GTO (LS1 OR LS2) was only a 12.9 with a 100 shot, then his car is broken.
STOCK those cars have been known to pull a high 12.
Having owned a GTO and seen MANY at the track I can tell you I have NEVER seen one run a high 12 stock. I have seen MANY run low 14's and high 13's with a 97-102 trap. Those cars are expensive to mod and HEAVY. They do not respond very well to mods. My Ls1 GTO ran a best of
13.6@99 with headers/exhaust and tune. Not very good numbers in my opinion.