there's the 60' foot I was looking for... 1.8 is pretty good...so 13.4 might be your time without a whole lot of room to improve...maybe faster shifting and a slightly better launch could bring you into a 13.3 or 13.29 or somthing
either way, 13.4 is really good
also...what is the car you ran against that got the 13.6 @ 103?