To answer your question, a friend of mine swapped the engiine out of a GSR and had headers, intake, exhaust and beat me at the drag strip by .3-.5, I was still essentially stock then. He also didn't drive very well, and eventually he hit 15.1 @ 92/93. A stock SE won't turn those numbers without significant mods, so you have nothing to be ashamed about.
Oh...in B4 da lok :p
In the future...talk about this stuff like you did it on the track
