Once you get into the 12's (high/low) with mph over 120, tyres are the clincher...
On street tyres (ie. falken azenis st115 - which are ), the best I've run is 12.3 @ 124mph - with a 2.35 60ft...
Going by the fact that for each 0.1 sec at the 60ft line you should be able to make up 0.2 sec at the other end, a 1.85 sec 60ft time (in theory) should be worth a full second at the other end of the track.
The thing you've got to remember, is think about how quick 0.1 of a second is. It's about the same amount of time as it takes to blink!
The cheapest way to get an 11 sec 1/4 with the smallest amount of power, is a set of 90/10's in the front, 70/30's in the back, a 4000rpm high-stall, slicks and a set of front-runners!
Cheers,
matt