You really think that every zetec vct left the factory with exactly 125 hp. Its a motor not an exact science some respond differently to mods look at all thee different computer codes we have to deal with. Well documented up here how some like chips more than others
If air density and tempreture made no difference nitrous would still be only at the dentists office.
If I have learned anything about motors in the 31 years since I rebuilt my first one its that some run better than others so get used to it
As for the atx I'm running Trick shift synthetic no quick fix but it helps
and the ect.. mods believe it or not I dont care but 122 fwh is what I have