WHAT KIND OF LS1 are you racing?
i have a stock 2000 WS6 with the A4 auto. and stock at 1,800 above sea level it runs 13.2 and 13.3 all day. i never did anything to this car.
this car also has the stock 3:23 gears and aluminum drive shaft.and the WS6 has a different cam then the regular z-28...