Drag strip vs. Street Strip

[Wren57]

Ive been wondering this for a while and cant really figure it out... why is my car fast on the street but sucks ass at the drag strip? On the street I can hang with 14second cars, but am 16seconds at the track... this just doesnt make sense... does it have to do with track preparation more than anything? ie: removing spare, deflating tires, etc? Im sure theres a simple answer but I cant see it. And no dont say Im jumping the light on the street cause I normally start a little behind my "opponent" because I want to make sure they are racing before I go... that and I have an auto tranny ... Anyways... any help would be appreciated... thanks