doesn't work that way, first 1/8th is from a standing start, the second 1/8th you are already close to maximum speed so it is a lot quicker.
bingo wayne !!! after the initial launch - especially the first 60 -100 ft - the power band tapers off. by the 1/8th mark the car is in high gear and rolling on the 1 to 1 gear ratio and therefore still accelerating toward maximum r.p.m. once more. greg's formula is close as the stude runs 11.9's in the 1/4.