I recently bought a 2000 z28 with the ls1 an i think it has been programmed. does any1 know what kinda times a stock ls1 with sum kind of cheap muffler on it should run in a 1/4 mile? thanks for your help

 

With the best drivers:

Auto: 13.7@102
Manual: 13.5@104

Just approxiamations.

 

I bought my 2000 in August of 03' w/24K original miles. It was fairly loaded, no leather and had 2.73 gears. Completely stock I managed to go 13.46 @ 104 on the stock RS-A's. I ran a slew of 13.5 passes that night as well.

You should be in the 13.4 - 13.6 range w/o any problems.