why no gain in et or mph after changing 323 to 373 with 1995 Z28 Camaro A4?

 

If your hooking off the line, maybe you're spinning when the tranny shifts. I play hell keeping the street tires from spinning off the line. It always fishes a little at 1-2 and sometimes (road conditions) 2-3 WOT shifts. Hope that helped.

 

How were the weather conditions during both runs? It would also help if you posted the whole time slip, 60' 1/8th, and 1/4.