mph or feet?
2.0 60 ft, soft launch with 600 plus horse side oiler. Rebuilt, 500 plus horse. 60 ft time remained the same, 1/4 ET dropped 3 mph and just under a 1/10th of a second.
This pretty much shows what ever horse power you can't put to the ground is wasted except at the end of the 1/4 mile. At the end of the 1/4 is typically where a big block outshines a small block even if there the same cubic inches, now figure that one out!