First off, you can hit high 15's stock gutted, 1/4 tank of gas, right weather conditions, precision timing, and if your somewhat experienced. Unless your consistent and rather good, you won't do it all the time.

Also, it is possible to do a head swap from a 1.6L vtec and as some others pointed out, porting polishing the bajibus out of it will get you in low 15's. 14's I doubt...not unless your running a turbo and you don't mind risking your clutch and head