I actually ran better 1/4 mile times when I moved the nozzle from right above my TB (on a Zetec) to back by my airbox.
I know that's not really an option for the Duratec, but something to think about.
It also seemed to help roll the nitrous on versus a sudden hit.

Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST Pre98 Zetec - Some Mods