[s13dan]

im not a big drag person but ill tell you what i have seen or experienced.
A stock suspension S13, Mostly stock redtop, with decent street tires can pull a solid 2.0 60 foot.

Most people i have seen with a Kaaz 16 plate and supension, and DR's can pull 1.8 60' pretty easy and 1.7 is very possible. Again with a mostly stock SR.

I was pulling 2.0's and running 13.70's
Simular S13 with a mostly stock SR, kaaz pulled 1.7 60' and ran 12.40's
The exact set up i dunno. But this shows what small changes can do as far as drag racing. This thread could be very useful if there was enough info shared.

Three tenths off your 60' and it will make a dramatic overall difference in 1/4 miles times.